The DeHaviland Comet: The First Passenger Jet 

Fun or not so fun fact the comet can be very deadly Also do a megaproject on the B-29

Please make a video about Bar Lev Line, costing around $300 million in 1973.

Do something else besides a plane man I would really appreciate that

Simon, I love your videos. Keep up the hard work, and Happy Thanksgiving to you and your family!

You may want to correct the title, it's supposed to be "de Havilland Comet."

Agreed. Simon has too few channels!

@@starsoffyre Hes clearly been slacking

Planeographies? Skyprojects?

@@chacecrowell planeographics

Aerographics

Unfortunately the only thing learned from the Comet Disaster was that aircraft manufacturers could no longer be trusted to conduct their own crash investigations. The Comet remains the worst jet airliner in history

Chow Mein gobblers should be aware. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*

German Autobahn!

*Eisenhower Interstate System

I'm with this would love to see this Simon

If an entire city in the middle of nowhere was only a side project I don't think the interstate would qualify anymore

Absolutely. If the Interstate interests you, check out the documentary 'Divided Highways' (1997), and the book it was based off.

Reminds me of another commercial airliner that had problems was the Lockheed Electra. However, it went on serving the Navy as a P3 subchaser for decades.

Correct. In fact the engines being located in the wing roots made it very well suited to sub hunting as you didn't have engines hanging below the wings upsetting the various sensors.

No, the Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.

@@sandervanderkammen9230 I learn. Thank you.

Chow Mein gobblers should be aware. Nimrod work started before 1954 at Dehavilland. The Dehavilland team, wherever they were, were responsible for all Nimrod work. The Nimrod is a Comet. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*

The main outcome from The Battle oh Ha[ton Roads was that is a few short hours all the world's navies became obsolete. And had the Monitor fired full shot rounds the C.S.S. Virginia would have probably been sent to the bottom.

@@garfieldsmith332 That and the fact that the Monitor had so many technological advances that were quickly adopted. Below water marine heads, mechanical ventilation, mechanically rotating turret, just to name a few.

@@joshuahudson5336 Yep. And it gave is name to a whole class of ships. A lot of designs were called "Monitors" after that. "Tough little ship".

I love the nimrod, one of my favourite aircraft.

Nice to see this comment, it was one of my Great-grandfather's projects, he became chairman of Hawker Siddeley having worked at deHavilland before the merger!

The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.

​@@johnhiggins9484*Hey Johnny boy!* *Please name a single British company that still makes commercial jet aircraft in the UK?*

​@@sandervanderkammen9230 ​@sandervanderkammen9230 We feel we can clear up some misunderztandungz. It's always very important to note the relevant facts obviously. *_Muncherz Krappenz DiktorBummer KARZEESTAN Jurkzxoffenzstadt Aonelynewasz & co - they should all note with much awe and great wonder._* ***** *How come they can't answer simple questions - why is that?* ***** *_DID SOMEBODY ACTUALLY SAY SOMEWHERE THAT THERE'S AIRLINER ASSEMBLY LINES OR SIMILAR IN THE UK OR IRELAND OR THAT Airbus or BOW-WING is actually British? (B-47 wings on many occasions folded up in flight or dropped off while parked)._* Of course Brazil makes very good airliners & Brazil is 100th down list along with Indonesia for wealth per capita. *Norway Holland Denmark Ireland Belgium - Top 20 wealth per capita - Don't make airliners - its as simple as that.* BAe Systems & RR combined now do more Airbus work than Germany on an absolute basis & significantly more work than that on a per capita basis. Per capita for the home nation BAe Systems is the world's largest defence contractor. _BAe systems announced the recent £4 Billion takeover of Colorado based US based Ball Aerospace._ *BAE systems now does a significantly higher value of work for Airbus than it did when it was a major Airbus shareholder before 2005.* *_RR now owns US Engine maker Allison for example which does classified Aerospace work for the US Govt._* The UK has more important stuff to do these days. _Routine simple passenger aircraft airframe assembly is becoming more of a 3rd world / trailer park area thing._ EG - *_The DH Comet - world's first high altitude capable pressurised passenger cabin jet airliner in regular service, world's first jet airliner aircraft to cross the Atlantic, worlds first jet airliner aircraft to complete a global circumnavigation flight series._* *They might try to sensibly answer this question - why do they believe that BAE Systems & RR (aero engines etc) & other companies, for example should be doing anything other than what they currently do & where do they get the idea from that the DH Comet had any affect at all on the progression UK aerospace sector.* *Anybody currently flying on a widebody airliner stands a good chance of being on an aircraft powered by RR gas turbine aero engines built in England.* 📯📯📯📯 *The New RR Trent Ultrafan* *Built In England* *_World's Largest (see T&Cs)_* *_Gas Turbine Aero Engine_* 📯📯📯📯 👍Manufactured by the people on a small island with less than 1% of the world's population.👍 *_A typical but small glimpse of what goes on in the very internationally orientated British aerospace sector._* - Boeing Apache Attack Helicopter. AH-64: *75 UK suppliers,* 7% UK content, global fleet of 1280+ aircraft. *F35B more than 130 UK Suppliers, more than 30% UK content.* *_F35A & F35C more than 130 UK Suppliers, more than 15% UK content._* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 extra points._ Which country has the *World's Highest Combined Per Capita* *Nuclear / Defence / Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S.* _Toodle_ -PIP- *Old* *_C H A P._* The next line is blank intentionally. The Cue Code below doesn't work. .ci c.viix. .cvi.. vc v..v.iicvx. .. cci. .cci viv. .x.. x.i..x x.ic.c.c V. ​​​​​@

This sounded like a cool thing...so I searched to see if anyone had done it. Turns out this channel did it 4 days ago :D I wonder if he saw this comment.

@@Gazmus Well I did spam this comment ever single episode, so 3 times a week for about 4 months so quite likely. He has a team of writers go through the comments and given how many topics and the filming time it usually takes about that long from your suggestion I guess, plus depends on how many thumbs up you get.

I started this video expecting a mention, and totally forgot until I saw this.

The Nimrod is not related.

@@Markle2k I thought the Nimrod was based on the Comet. Where does the Nimrod come from?

The Nimrod was developed from the de Havilland Comet by Hawker Siddeley. The modification of the de Havilland Comet design was extensive. So while they are related, perhaps not closely enough for a mention and possibly not relevant to the history of cvilian aviation.

I guess it means more to "geeks" who already know, not necessarily his full audience.

Yes they do give a sleek look, however, that prevents the Comet from being able to accept high bypass engines unlike the underwing engine design of the 707. But I think it was really big news when this thing first flew twice as fast and much higher than the prop jobs. Probably the next time that happened was the Concorde.

@@wrightmf Yes it's always a risk to integrate things. Elegance isn't always the most important virtue. Accommodating ever wider engines remains a problem to this day; it was the start of the chain of events that got the 737-max into trouble.

Excellent comments, the answer is the design of the engines in the wing were ultimately responsible for several major runway excursions. Based on a British aerodynamic theory that later proved completely wrong, wind tunnel tests did not account for angle of attack at take-off. The flawed placement of the engine inlets in the wings leading edge caused a disruption of air flow into the engines causing loss of thrust, AND disrupted flow over the wing causing loss of lift at the critical rotation angle. Comet 4 required extensive modifications to the wings and inlets and take-off performance was reduced to mitigate the effects that could not be fixed. No other manufacturers have ever used this design.

@@sandervanderkammen9230 Wow! Thank you. After all this time (2 years) someone has an answer. And your answer completely makes sense to me. Even though the inlet arrangement isn't the issue, modern twin jet airliners have a takeoff procedure in place to avoid the same problem. As the takeoff roll begins, the pilot pushes the throttles to only a partial setting. Then a short time later the throttles are push up all the way to takeoff power. The reason is that at the initial slow speed, if one engines output failed, while the other spun up to full thrust, the pilots would not be able to keep the plane on the runway. Only after they've confirmed that both engines output have reached a certain level (usually 40%) do they apply full power. There are instruments that display this information to the pilots. I do not know if the procedure is 40% for all twin jets, but it will be similar. Thanks again for the answer.

@@bob2161 Not exactly, it is an aerodynamic issue, not related to the engines themselves. If you look carefully at the engine inlets on the Comet 1 and compare them to the Comet 4 you will see some significant re-engineering, the 4 has much larger inlets which are angled downwards below leading edge line. They help reduce the problem but do not solve it completely, the new inlets are less efficent and create more drag.

@@bob2161 The Comet 4 was also redesigned with improve wings, flaps and hydraulic flight controls to reduce the angle of attack at rotation and prevent pilots from accidententally over-rotating if the plane doesn't lift-off at the proper V-speed. The Comet 4 requires a longer temperature/altitude/GTOW distatance and the new engines provide more thrust to weight ratio performance at TO.

@@sandervanderkammen9230 i understood that it wasn't the engines themselves. It was due to the shape of the original inlets. When the angle of attack was wrong, the inlet would restrict the airflow to the engine. This would cause an interruption of power from the engine. If/when this happens on one side of the plane, but not the other, an asymmetrical thrust condition is created. At low airspeeds and/or high angles of attack, there wouldn't be enough control authority to keep the plane from yawing towards the compromised engine. This would indeed cause an "Uncommanded excursion from the desired flight profile". It isn't the same problem I described with the modern twin jets, but it produces the same symptoms, and ultimate outcome.

Tragic engineering blunder, the engine placement was a fatal flaw.

​@@sandervanderkammen9230 ​​​@sandervanderkammen9230 Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The engine positioning had some advantages & were of course not a flaw of any type. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... . ... .. ... ... . ... .... Ivcxivcxivcxcx iivxvivcxiccxxcc

Maybe an ease of maintenance flaw.

​It was a flaw that caused several crashes. ​@@android584

The ship which humiliated the Royal Navy gunboats trying to chase it, being the first steam turbine-powered seagoing vessel.

Lindybeige has a really good documentary on that: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vrZ5IE-1GJ4.html

At least 3 crashed due to the placement of the engines, the Comet 4 required major corrections to fix this fatal flaw in the Comets original design.

​@@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. The engine position was not a flaw & caused no crashes. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxmcvxxcc

Boeing, Douglas, Junkers and Lockheed were all manufacturing pressurized passenger airliners prior to the Comet Disaster... What we learned was that DeHaviland was a poorly managed company that was decades behind in aircraft design and construction technology.

The Comet Disaster is the worst engineering failure in aviation history...its and example of what happens when a company tries to save weight and cost at the expense of safety... it's called criminal negligence today.

Chow Mein gobblers should be aware. *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% Boeing 707 USA *20%* Lockheed Electra USA *29%*

​@@sandervanderkammen9230 ​@sandervanderkammen9230 ​@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . ... . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcxcvc xcxiivxccxvcvccv vivcxiccvccvxxcc

Indeed. I was on the set for a couple of days. It was fun walking around the 'towns' they'd constructed.

The Nimrods were new aircraft manufactured by Hawker-Siddeley.

@@sandervanderkammen9230 I never knew that, cheers. They also flew the Vulcan, Victor and Shackleton right over the playground on approach to Woodford Aerodrome. We saw many prototype variants of Nimrod with different R.A.D.A.R domes.

@@sandervanderkammen9230 The main body was from the Comet ! I worked at FRA and when the aircraft were striped down you could see where there had changed the windows from the square ones !

@@RJM1011 Not true, only the prototype of the Nimrod was built from a unsold Comet 4C. The Comet 4C was a completely redesigned aircraft and none were ever built with square windows. It seems you have your facts confused here.

​@@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, prototype Nimrod work started at Dehavilland in 1953. Nearly all changes from the Comet 1 to Comet 4 were simply previously scheduled improvements that had nothing to do with any claimed relevant incidents. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxiccvccvxxcc

Material properties weren't nearly as well understood as they are today.

Kind of. They understood the raw strength benefits of a round window, but ease of manufacturing favoured a square for the Comet. What they didn't appreciate was how much the strength falls off with fatigue.

The B-29 wasn't a completely pressurised aircraft. By the same token some P.R. Spitfires and Mosquitos were pressurised. Pressurising a complete airframe for 40,000' is a whole different ball game.

DH were doing all metal airframe construction aircraft & pressurised cabin aircraft & building jet engines for many years before the Comet. They also knew all there was to know about metal fatigue at the time & carried out an extensive & protracted programme of testing & proving before the first Comet prototype flew. They were also fully up to speed in all matters related to pressure vessels & any stress concentrations due to cutouts such as windows doors & hatches. Nobody had done an airliner with an 8 psi pressurised full fuselage length passenger cabin before the Comet.

You flew on the completely new, redesigned Comet 4. All the Comet 1 aircraft had their airworthiness certification permanently revoked, they never carried commercial passenger in regular service after 1954 and were eventually all scrapped or used in testing.

​@@sandervanderkammen9230 ​ ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... .. .. ... .... ... ..... . Ivcxivcxivcx xcxiivxvccv vivcxiccxxcc

Metal fatigue was in fact well-known and understood before the Comet Disaster... Boeing, Junkers, Douglas and Lockheed were building pressurized passenger airliners years before the Comet Disaster.

Come on Simon you have to do it Sean Bean died there

And I'll shut up about it!

Sadly Arecibo will be demolished soon.

Not true, although some cracks originated from the corners of the navigation port and passenger windows. It was the bad fuselage skins, lack of rip-stop doubler joints and shoddy workmanship in the riveting that actually caused the catastrophic structure failures...

The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.

The Boeing 707 was the plane that revolutionized aircraft travel... the Comet Disaster remains a shameful chapter in aviation history.

​​@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* Bow-wing (see b-47 wing folding incidents) is the result of global economics & a large & well protected domestic airliner market. The 707 happened to be much larger & thus required a thicker stressed skin for flying stress loads. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcx xcxiivxccxvccv vivcxiccvccvxxcc.

At a high altitude the front end of this plane would fall apart. Also the plane had square passenger windows.

@@johnbockelie3899 the shape of the windows is not why they exploded... just the source of some of the initial cracks.

​@@sandervanderkammen9230 ​​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awe & extreme wonder. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, Nimrod work started at De Havilland in 1953. The committee did not find hundreds of fatal flaws or evidence of design defects, structural defects, defective materials or shoddy workmanship. Ripstop provision was included. Claimed incidents did not involve cracks starting from window corners. The engine & engine intake position had advantages, were not flaws or fatal flaws & were not the cause of any incidents involving any Comet or Nimrod aircraft. Nearly all changes before the Comet 4 were just in case or were previously scheduled improvements. Bow-wing & the 707 story (see b-47 wing folding incidents) is the result of global economics & the well protected & very large domestic US airliner market & active support from the UK with for instance proposed Competing airliners from Vickers & DH being blocked. The 707 was of course a much larger aircraft which as a stressed skin metal airframe aircraft would require a thicker skin anyway. They got lucky at the time essentially. Bow-wing is the result of the large & well protected US domestic airliner market The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* This line left not blank intentionally. . .... . ... .. . . ... .. ... .... .... ............ ..... . Ivcxivcxiv cxcxcvccbccc xcxiivxccxv ccvvcvvvvvv vivcxiccvccvxxccvvv.

BOEING was building modern all metal pressurized passenger airliners a decade earlier... when DeHaviland was still building WOOD biplanes.

@John Higgins But the Mosquito was not a durable or safe aircraft... in fact there are no original Mosquitos in airworthy condition due to their fragile wooden structure does not age well.

​​@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* De Havilland built many all metal construction airframe aircraft & pressurised aircraft & of course were building jet engines many years before the Comet. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ixivcx. xcxiivx

IIRC the film is called 'No Highway in the Sky'. It's based on a novel by Nevil Shute, who was an aeronautical engineer as well as an author.

@@simonbeaird7436 d’oh.....my bad

One of my favourite films

Boeing 737 Max anyone?

@@PenzancePete The Max is back... The Comet 1 had its airworthiness certification was permanently revoked.

@@sandervanderkammen9230 It was not permanently revoked it was suspended till the 1 airframes were upgraded to Comet 2 sepcs.

@@matthewq4b Sorry, but that is incorrect. The Comet 1s airworthiness certification was in fact permanently revoked. No Comet 1s ever returned to commercial passenger service.

@@matthewq4b Comet 2s only saw service with the RAF or for testing under a restricted temporary airworthiness status with a very restricted number of airframe service hours before they too were forced to be scrapped due to metal fatigue.

Have a like on this comment then lol

@@Sh_rib Ah cheers bruv. one love👍

The Hawker Siddley HS.801 Nimrod is not a Comet, it has a completely different type certification and shares nothing in common with the early failed airliner design.

Well, technically you could be correct, but the fins that i used to build used the same jigs for Comet and Nimrod.

@@techauthor324 True, much of the tooling and fixtures were recycled and repurposed by Hawker Siddley, much of the de Havilland tooling was still NRW or like new as production of the Comet ceased after just 114 total airframes.

Boeing, Douglas, Lockheed and Junkers were decades ahead of DeHaviland in pressurized cabins and riveted aluminum airframes... You realize that DeHaviland was still building WOOD biplanes like the Dragon Rapide in the late 1940s... Even the Vampire and Venom were still made of *WOOD!!!!*

@@sandervanderkammen9230 G'day Sander, I think there is a slight misunderstanding on your part. I did not denigrate Boeing, Lockheed or Douglas nor was that my intention. The Mk 1 DH Comet being the first of its type and conceived during WW2 was ground-breaking technology 'almost' a decade ahead of its time. Supermarine experimented with flush riveting during the height of the Schneider Trophy's popularity, pre-WW2. Howard Hughes did similar 'flush jobs' on 2 of his racing planes, yes, pre-WW2. The Mk 1 Comet's main flaw was using, basically, conventional metal skin technology in an aircraft never before put under the stresses of continual cycles and their concomitant vibration issues brought about by the jet technology of the time. It's demonstrable and a fact that many British aeronautical and other technical innovations were passed on to the US (gratis) because Churchill, even before he was PM and at the Admiralty, was willing to go to any lengths to draw the US into WW2. This process began before the war, like British proximity fuse technology. There's no room here to go into the long list, however, when it came to British jet technology the Brits keenly handed over all they had on Sir Frank Whittle's jet engine inventions. The US military then 'gladly' invited British scientists and technologists to the US. By the time various British teams arrived in the US to work on different projects; the same military leaders made certain that laws were passed that forbade them from sharing any of 'their' military technology, even with Allies. The Brits were told, quite clearly to go home. This happened again when a certain team of British scientists, instrumental in new atomic fission theories were also told to go home even though they had been officially invited. True, some Brits did work on the Manhattan project but only at the insistence of Prof. Oppenheimer. Back to jets. It is also demonstrable that the early US attempts of replicating the successes of the British Gloster Meteor or the ME-262 were pitiful; their prototypes were slow, had low ceilings, poor ranges and handling. The notorious US Operation Paperclip didn't exclusively poach German rocket scientists but also jet propulsion experts, among other disciplines. Finally, with respect, you seem fixated on aircraft composed wholly or partially with "WOOD!!!!" [sic]. Did the DH Mosquito, perhaps the most valuable, versatile and fastest prop. wooden, aircraft to see service in WW2 escape your memory? The ME-262, by the way, had one major flaw: Adolf Hitler. He stupidly insisted it be made into a bomber. I'm an Australian 'republican' so I'm in no way defending the Brits. I am, also, a military historian and ex-air force member, primarily concerned with corroborated facts. (I have copies of official documents that back up over 80 percent of statements here. There would be more if I had time to spend on this reply.) American aviation has achieved magnificent technological advances. So, I have no axe to grind there either. My apologies if anything I said in my post confused you. Cheers, BH P.S. I forgot to mention that during WW2 the British developed some truly terrible aircraft that did little more than slaughter keen, young RAF and Allied aircrews that deserved much better protection and quality control in their brave defence of Britain and democracy. My good mate and author, Michael Veitch has written three excellent books of interviews with British, Australian and New Zealand survivors of the air war over Europe. Those unlucky enough not to fly Hurricanes, Spitfires, Mosquitoes or Lancasters yet survived somehow, attest to the shocking designs and qualities of a large proportion of aircraft available to RAF and Allied Air Force aircrews. BH

@@BillHalliwell his silence is deafening

Yep. There was a rush by DH to get into the air first. I believe the CF-102 was a superior aircraft. A tad slower but all round better and safer.

@@garfieldsmith332 It was simply NOT even close to the sophistication of the Comet. There simply isn't one part in all the thousands of pieces that approached the genius of the Comet engineering. The Comet was the archetype commercial jetliner and still looks the part 70 years later. The 102 looks like a DC4 with an engine upgrade.

@@martinda7446 🤔, yeah about that engineering. The poor souls on those three Comets lost within 12 months would disagree with that assessment.

Don't forget the Nene Viking with two R-R Nene engines and Tay Viscount with R-R Tay jets...

@@martinda7446 I do not think the Comet looks that great. Similar engine configuration to the C-102. I would rather fly in a DC-4 with and engine upgrade back then.

The Hawker Siddley HS.801 Nimrod is not a Comet, it is an completely different design and shares no parts or structures in common. Both aircraft were plagued by metal fatigue problems

Good comment. Insufficient skin thickness, lack of doubler joints and bad riveting was the ultimate cause of the catastrophic structure failures.

It wasn't bad riveting but with how the rivet holes were made. The holes were punched by the rivet. If they had drilled the holes or used another method it would have worked. Another video indicated they tested the airframe but did one test first which covered up the second problem. If they had used separate airframes in testing the problem would have shown up.

​@@MulticsfanThe workmanship and techniques were both found to be well below standards of the day, inspection was also inadequate.

​@@sandervanderkammen9230 ​@sandervanderkammen9230 ​@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivvcvvcx xcxiivxccxvccv vivcxiccvc cvxxcc

The Comet Disaster was the worst engineering failure in commercial aviation history. The construction of pressurized passenger airliners was not new, it was well-known and understood by the leading manufacturers. DeHaviland lagged decades behind, they were still producing biplane airliners made out of WOOD and fabric!!!!

@@sandervanderkammen9230 yes but what it wasn't well known and understood was the behaviour of cracks when they are under fatigue and THIS was what caused the accidents not just the pressurisation.

@John Higgins You don't get it do you? DeHaviland was decades behind in aircraft construction techniques. It had very little experience with building aircraft structures out of aluminum and almost no experience at all in safe use of metal riveted joints. The Comet was clearly beyond the technical ability of the company to design and produce..

@@asiesjefa1758 Apparently you do not understand... DeHaviland was more than a decade behind in transport aircraft design and construction. Metal fatigue was in fact well-known and understood. The Boeing 307 and 377, the Douglas DC4 and DC6, The Lockheed Constellation were all flying with pressurized metal airframe structures. long before the _Comet Disaster._ The Comet remains a shameful example of incompetence and criminal negligence in the aircraft industry.

@@sandervanderkammen9230 I'm just quoting what my university professor of this particular field says and yes, maybe it was known that cracks could spread with fatigue but it wasn't well-known as you assure because if so they would have tried to avoid high stress states (idk how it is said in English that) and they didn't.

planes get most views

Can there be such a thing as too many plane videos 😅

And I'm here for it

Lockheed and de Havilland could not be more different, Lockheed is hugely successful and supplies the RAFs most advanced jet fighter... while d-H was destroyed by the _Comet Disaster_ and no longer exists.

@@sandervanderkammen9230 it’s like no one wanted to buy the Nimrod where even though the Electra had early problems it flew on for years. I flew in one a few times going to Dutch Harbor in the 1990s. Lockheed was already building other military aircraft like the C-130. Then but the 60s they had the C-141. I flew in a 141 once from Maine to the Azores. I flew quite a bit in P-3 as an avionics tech. I even went to a Nimrod base in SW England in 1974.

​​@@sandervanderkammen9230 ​​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awe & extreme wonder. *UPDATE MORE BREAKING NEWS ETC* The Comet was designed with military use in mind, Nimrod work started at De Havilland in 1953. The committee did not find hundreds of fatal flaws or evidence of design defects, structural defects, defective materials or shoddy workmanship. Ripstop provision was included. Claimed incidents did not involve cracks starting from window corners. The engine & engine intake position had advantages, were not flaws or fatal flaws & were not the cause of any incidents involving any Comet or Nimrod aircraft. Nearly all changes before the Comet 4 were just in case or were previously scheduled improvements. Bow-wing & the 707 story (see b-47 wing folding incidents) is the result of global economics & the well protected & very large domestic US airliner market & active support from the UK with for instance proposed Competing airliners from Vickers & DH being blocked. The 707 was of course a much larger aircraft which as a stressed skin metal airframe aircraft would require a thicker skin anyway. They got lucky at the time essentially. Bow-wing is the result of the large & well protected US domestic airliner market The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* This line left not blank intentionally. . .... . ... .. . . ... .. ... .... .... ............ ..... . Ivcxivcxivxcv cxcxcvccbxcvcvx xcxiivxccxvcv ccvvcvvvxcx vivcxiccvccvxxccvvv.

Riveting aluminum was well-known and understood in the aircraft industry before the Comet Disaster... DeHaviland never got the memo, they were still building biplanes made out of WOOD and FABRIC in 1949!!!

@@sandervanderkammen9230 Yes I agree... I'm an aircraft maintenance engineer so I have a background in the subject. What made this different was lack of a knowledge when it came to the pressurizing of the fuselage in combination with the style of rivetting. We are taught even with solid rivets not to allow burrs to remain when drilling as this is a point where cracks can propagate from. This form of rivetting was fine on low performance unpressurized aircraft, but an absolute no go on these jets. The way they investigated and found the problem was game changing at the time

@@SparkBerry Not true, riveted aluminum airframes and pressurized cabins were nothing new when the Comet Disaster occurred...

@@SparkBerry Alot was learned by DeHaviland, there claim to fame was laminated plywood construction and the use of polyvinyl glue. The company had very little experience with aluminum and almost no experience in riveted fuselage design or fabrication. DeHaviland chose to punch the rivet holes rather than drill, used skins that were much too thin and did not install doubler joints... The Cohen Committee investigations found extremely shoddy workmanship in the riveting including loose rivets, cracked skins from rivets being over driven and misfprmed heads due to the riveting length being incorrect. Unforgettable mistakes today and unacceptable in the 1940s as well.

That's a good one. Kind of the UK equivalent of Hughes' Spruce Goose (commercially, if not technically).

@@bimblinghill I am revolted every time i hear that nickname just have it the H-4 and be done with it. (sorry it's at least 1 am here and I hate everything)

By 1948 metal fatigue was well-known and understood by the leading manufacturers like Boeing, Douglas, Lockheed and Junkers...

Inadequate skin thickness and the lack of doubler joints is what actually caused the catastrophic structure failures... This is why the early planes could not be fixed by simply changing the windows... their airworthiness certification was permanently revoked.

@@sandervanderkammen9230 Yes, but most (not all) of the riviting failure areas were identified around the unusual square windows. As I said it was a MAJOR factor not the only one, why else would they remove a heavily promoted feature (everyone likes large windows rather than pokey porthole like windows that were the norm until then) if not because they were unsafe on pressurised planes using the technology of the day.

@@ErraticPT The technology of the day was to use stronger, much thicker skins and install doubler joints... something DeHaviland in their ignorance failed to do at their own (and the passengers) peril.

Nothing beautiful about an airliner crash.

Aerospace engineers have not forgotten the worst engineering failure in commercial aviation history... we are all horrifed by what DeHaviland did.

@John Higgins *It was...*

@@sandervanderkammen9230 DrDikBummer / VinDurloo Krappen et al & co shows up here as well it seems spouting more total BS? Talking about Disasters? Please take some time to ¶S^ T. F °u if it's not too much trouble. *Air Disasters? Boeing 707 First single air disaster with more than 100 deaths.* en.m.wikipedia.org/wiki/Air_France_Flight_007 Boeing 707 865 Built. 174 destroyed during operational life is. en.m.wikipedia.org/wiki/List_of_accidents_and_incidents_involving_the_Boeing_707

@John Higgins The Comet was the worst jet airliner in history.

@@paulpaul9914 The Comet Disaster remains the worst engineering failure in commercial jet aviation history.

Problem is, it has to start somewhere.

The problem is you don't go from building WOOD biplanes in 1948 and start building fully pressurized jets in 1949... The Comet was a business plan doomed to disaster right from the start.

The Nimrod was developed by Hawker Siddeley and introduced in 1970... DeHaviland was defunct by 1958

​@@sandervanderkammen9230 ​ Kharzeestan Krappenz DiktorBummer Jurkzxoffenz etc and co - they should all note good with much awestruckness & extreme wonderment. *UPDATE MORE BREAKING NEWS ETC* The Comet design had military use in mind, Nimrod work was in progress from 1953. The fate of De Havilland was due to Govt policy Aerospace sector rationalisation & global economics, it was nothing to do with the Comet. A comprehensive, thorough & protracted testing program was carried out on the prototype & it's assemblies. Of course the Comet did indeed have Ripstop stop provision. De Havilland (Of England) Comets were not grounded after 1970 due to structural problems. *_It's interesting that some of the aircraft on the list should really have been noticeably safer than the Comet due to being a similar type but of much later design & manufacture but they definately were not safer._* How things were back then - *_Accident losses - % of aircraft built._* DeHavilland Comet 4 UK 14% DeHavilland Comet all mks 17% Vickers VC10 UK 5% *_The DH Comet had better safety than or similar safety to many other commercial passenger aircraft of a similar era_* Douglas DC-1 99% Douglas DC-2 47% Douglas DC-3 30% Douglas DC-4 26% Boeing s300 72% Boeing 307 70% Boeing 247 48% Boeing 707 20% Lockheed L-049/149 Constellation 30% Lockheed Electra Turboprop 29% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Sud Aviation Caravelle 15% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% A comparison of more recent aircraft. Accident losses comparison examples. 1970s - 1980s % of total Aircraft built Similar aircraft type, date / decade, useage, size. Biz Jets BAe-125-800 1.7 % Beechcraft Beechjet 400 2.2 % Cessna 550 Citation II 7.1 % Learjet 35 / 36 12 % Beechcraft 1900 6% Dassault Falcon 10 11.5% Aérospatiale SN.601 22.5% Medium size jets / Turboprops. BAe-146 5.1% Fokker 100 6% McDonnell Douglas DC-9-30 9.5% Fairchild FH-227 30% McDonnell Douglas DC-8 14% Canadair CL-44 Turboprop 46% Convair CV-580 Turboprop 22% Beechcraft, Fokker, McDonnell Douglass, Learjet, Fairchild, Aerospatiale, Canadair, Convair companies defunct. All Comets, including some Comet 1s, had full civilian use certification at some point after 1954, civilian use certification only being withdrawn after commercial flying stopped. Examples were flying until 1997 - one example did a signals research global circumnavigation flight series in 1993 via Australia virtually without a rest travelling 28000 miles, only had an ice warning indicator issue during the flights. *The DH Comet - World Firsts.* 1st gas turbine jet powered airliner. 1st high altitude 8psi pressurised full fuselage length passenger cabin airliner, not a trivial feature as structure strength required for pressurisation considerably exceeded strength required for normal flying stress. Nobody else had done anything similar before the Comet. The b-47 used 2 relatively small, heavily built pressurised modules (the aircraft where 6 had their wings fold up in 2 months while flying & some had their wings fall off while parked). The 1937 Boeing piston engined airliner pressurised passenger cabin was pressurised to 2 psi only - in fact that could easily be done as the normal unpressurized fuselage cabin structure strength for flying stresses only was all that was needed to be adequate so no significant weight increase issues needed addressing. 1st all hydraulically powered flying surface controls & actuators airliner with under carriage wheel disk brakes + ABS. 1st jet airliner to cross the Atlantic. 1st jet aircraft to do a world circumnavigation flights series. *Of course De Havilland had prior experience building many all metal construction airframe aircraft including thousands of jet powered fighter aircraft that were primarily of metal construction with pressurised cockpits & jet engines built by De-Havilland & we know the world's first all metal construction airframe airliner was built in England in the 1920s by Handley Page.* *_De Havilland did indeed always work to better than industry standards at the time, used up to date knowledge for the design & no evidence of negligence or criminal negligence was ever produced in relation to the DH Comet._* The course of De Havilland & the general UK aerospace industry sector was not affected even slightly by the DH Comet. The course of national aerospace sectors obviously being similar & inevitable in many countries. *_Other interesting World firsts_* _World's first turboprop aircraft._ *Vickers Viscount Turboprop Airliner 1947.* *A 1945 Gloster Meteor Aircraft with Turboprop Gas Turbine Engine.* They might like to answer these questions. *Which airline has just ordered* *60 RR England Trent XWB Engines* *& What aircraft are the engines for?* _Bonus question for 10 points._ Which country has the *World's Highest Combined Per Capita* *Nuclear + Defence + Aerospace Sector Activity?* 👍 & 🙂 & of course 😎 indeed. *C H E E R S* & without doubt - _Toodle_ -PIP- *Old* *_C H A P._* . .... . ... ... . ... .. ... .... ... ..... . Ivcxivcxivcxvxxccv xcxiivxccxvcccvxcvccv vivcxiccvcvcczcvcvxxcc

Yeah, had to be an old timer like me