CONSTANT SPEED PROPELLERS: A Graphical Approach

Подписаться 1,2 тыс.

Просмотров 190 тыс.

50% 1

If you've thought of upgrading to a faster or more powerful airplane, then you may have heard of these "constant-speed" propellers. What are they? Why do they work? You may have been told about "governors" but not actually how to use the levers in the cockpit!

Наука

Опубликовано:

11 июн 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 144

@AAYGENTMULDER 3 года назад

This is the best explanation of constant speed prop operation I have come across! It made things so much clearer for me...Great job!

@brandoncenteno1834 2 года назад

Agreed. Everything else falls short in my opinion

@nickroyle4805 2 года назад

Agreed. Really brilliant explanation!

@taowilliam2377 Год назад

indeed

@humanbeing23456 Год назад

Absolutely, very good!

@FeguerFineArt Год назад

Indeed, Absolutely Agre!

@presleycosta4127 3 года назад

I recently got my complex and high-performance endorsements and every video I saw explained how it works but not actually how to use it in flight so thank you! Wish I had this before I got them haha.

@JC-cw1ww 2 года назад

The best complex demo out there. It's refreshing to see an illustration of the correlation between coarse/fine pitch and the change in position of the blade as the inputs are made, and also the sequence that power and pitch are used during different phases of flight.

@reydogmotor 2 года назад

Well Done, I’m a visual learner and I can see how the constant speed propeller works without asking. I’m only a student in a fixed wing but I can reference this aid in future learning, thanks !

@Almostth3R 3 года назад

By far the best explanation of constant speed prop I have come across on RU-vid.

@motorv8N 3 года назад

Best succinct tutorial on this concept I’ve seen - well done.

@cadejose7770 2 года назад

i guess I'm quite randomly asking but does anybody know of a good place to stream newly released series online?

@daxtonlukas8892 2 года назад

@Cade Jose Flixportal xD

@cadejose7770 2 года назад

@Daxton Lukas Thank you, I signed up and it seems like they got a lot of movies there :) I appreciate it !

@daxtonlukas8892 2 года назад

@Cade Jose you are welcome xD

@amariagomesbackup1479 2 года назад

Totally agree!

@Tomatow 3 месяца назад

excellent video. I am glad to have found something which explains this concept so well.

@Linoleumaz Год назад

This is the best intro tutorial on the subject, without a doubt. Thank you for your work, really great quality.

@edmoorebsc 7 месяцев назад

This really helped me realise something that's never quite clicked - I knew the 'high/low gear' analogy stuff but had got confused about the prop adjustments in climb and cruise and sort of thought that was the only 'gear change' happening - in fact your video makes it really clear that the prop governor is CONSTANTLY adjusting the 'gear' as airspeed changes, and the pilot's adjustments of the prop lever are more about putting the whole system into more fuel efficient 'modes' for the phase of flight.

@edsonherald3720 2 года назад

! ! ! OUTSTANDING ! ! ! ! ! ! BEST EXPLANATION EVER ! ! ! Many Thanks !👍🏽👍🏽👍🏽

@rockdogg5530 2 года назад

Thanks man , I have CPL exam coming up next week Tuesday, and these explanations with animations are just clear as crystal.

@hackdonalds Год назад

This has been the best explanation I have seen so far! Thanks a lot!

@invent5540 3 года назад

You've explained what my instructor couldn't! 350 hrs in my C-182 NOW I fully understand! My instructor would bla bla bla when I asked why? I got the same information from him but in a "just memorized it" format. Thank you👍

@invent5540 3 года назад

@Влад Платон Knowledge and skills are multi-faceted... weak here... strong there. Way oversimplification to say "not a good instructor" he flew 4 engine turbo props with 16,000 hrs for the US airforce. Trust me he knew more than most I've met but likely did not want to waste time with technical explanations. Who knows he's no longer in this world...

@invent5540 3 года назад

@Влад Платон Sorry, yes you're right, I did not intend to disrespect him though... he was excellent albit a man of few words.

@sonnyburnett8725 3 года назад

Your flying the best airplane around. I envy you.

@invent5540 3 года назад

@@sonnyburnett8725 Was... it was the company aircraft I had full access to... it was amazing. Now I fly with my buddy in 1950's ish rented C-150-152's When I was flying it I flew many times coast to coast across the US. Beautiful safe aircraft that never let me down... even when I got into IFR and icing conditions. As well it was almost new at the time...I miss it.

@NicoJames-zj6os 3 года назад

Amen to that. This by far is the best explanation for pilots who are new to complex airplanes. Well done!!

@lilsneeziuslol Год назад

This is an awesome video and I think this should be the first thing people watch when learning constant speed props. Other resources explained the mechanics and design decently, but being a visual learner like a lot of other people I had a very hard time visualizing and really understanding what’s going on. Thanks for the explanation!

@ozcanertem4861 3 года назад

Great explanation with supporting figures

@markgrunzweig6377 11 месяцев назад

Amen to the previous person. What's most important is how to use the levers.

@Hangishta 2 года назад

This was the easiest to understand video I've found so far.

@dungareesareforfools 3 года назад

Best explanation I've heard.

@kamvc72 2 года назад

have my exam tomorrow for propeller for my CAT A licence , Video is very helpful. Thanx

@Patenika 2 года назад

Wonderful video and great explanation of CSP and how to use it in flight. Good job!!

@rackum44 2 года назад

Great video The best explanation of this that I've seen on RU-vid Good job

@robertthrailkill1368 3 года назад

Well done, good graphics

@amariagomesbackup1479 2 года назад

What amazing video and explanation! Congrats! Thank you very much! 👍👍👍

@ajd0408 3 года назад

Nicely done!

@josephbarnes7217 3 года назад

Great video

@dalar2 2 года назад

Best explanation on this topic, amazing!

@starshipgus8578 Год назад

This presentation brought back memories from my service in the US Army,that was my job,to overhaul turbo prop hydraulic systems,balance props and inspection of blades under black light in a fluorescent fluid tank,it would reveal possible cracks in the blades.

@PH-GUS Год назад

Great video, helps me a lot to understand the difference between the constant speed prop and the fixed prop :)! Thanks.

@thinksupersonic3411 2 года назад

Great Video!!! Simple explanation of a very complex topic!!!

@santiagomichelena7763 2 года назад

Incredible explanation!!! Thank you very much!!!

@adamcarter1497 3 года назад

awesome breakdown of how and when to use the controls.

@larrymcintyre5693 3 года назад

It’s pretty simple

@brianberezowski5352 10 месяцев назад

WOW ... AWESOME video. A big THANK YOU from CYQT.👍🇨🇦👍

@robinhollinger3531 2 года назад

This is such a great video! Thank you!

@StickandGlider 3 года назад

Wow, this was well done! Subbed!

@uroscadez 2 года назад

very good explanation and analogy

@bw8669 2 года назад

I wish I saw this video in flying school. Good stuff. Thank you

@kobaddict Год назад

Very well explained 👏👏

@maddiemac365 3 года назад

Great video thank you

@smoshjkl 3 года назад

Extremely excellent and accurate descriptions and visuals!

@johnmccorry2397 3 года назад

Well done thanks for the help

@FlyingIceman198 2 года назад

well explained man thanks!

@romainpavone7336 3 года назад

This video really helped me to understand everything!!! Thank you

@ArieteArmsRAMLITE 3 года назад

Good job.

@raymondlancaster3355 3 года назад

Really a good video

@waltzb7548 Год назад

Wow! The best explanation of variable pitch props on a plane I've ever seen. Thank you.

@saurabhp3372 2 года назад

Wow amazing explaination keep doing more videos😍

@richardcollins3825 3 года назад

I think that this was beautifully done. Great work!!

@js_filming7701 2 года назад

Finally i got it. Thanks!

@seanmorris7883 Год назад

Great vid

@GUCR44 2 года назад

Thanks for the video! It helped

@justincaraway2116 2 года назад

By far and away the best explanation of constant speed prop I've seen on RU-vid!

@RoscoeMcGillicuddy Год назад

This was the best explanation for constant speed props I've seen yet, thanks!

@cgr3955 2 месяца назад

Wow thank you so much!

@cranleymadeit 3 года назад

Thanks. Definitely the best explanation I’ve seen on the topic. And 1/10th the length of some of the videos that still left me confused.

@hl6859 4 месяца назад

Thank you.

@taiming71 Год назад

Cool i have always wondered what the 24x24 meant. I knew it had to do with engine settings. But you explained it very well.

@mrthomaslaux1 3 года назад

Very good

@suren9831 2 года назад

Bro thank you very much to this video.

@sklajban 3 года назад

Excellent! 👏🙌

@losien1 3 года назад

It was well done and informative. This is how my RC collective pitch helicopters work. Governor keeps the RPM at constant level and you control the lift/torque by changing the angle of attack of blades. Now going back to planes. While this solution has advantages in fuel economy (money always win) it’s much complex mechanically which has more potential to failure compared to a fixed pitch prop so this has to be taken into consideration especially if we talking about commercial aircrafts, right?

@erkanorman5936 Месяц назад

perfect, thanx🙏

@jankin880 3 года назад

Great explanation ...great graphics. ...thanks

@ramirosevero Год назад

great job mannnn tkssssssss

@guillaumefo 2 года назад

the best, by far

@jaromirandel543 Месяц назад

For cruise we want to set propeller to its best angle of attack. Which is around 3° At this setting it has the best thrust to drag ratio. At the same time we want low RPM at high torque, lean fuel mixture and overall aircraft's AoA with the best lift/drag ratio. Everything must be tuned to be able to reach this condition.

@captaincaceres5740 Год назад

Top! Liked 30 seconds into the video, maybe I took too long. We'll done! 👍

@pk7549 3 года назад

In a propeller airplane, the thrust available decreases with an increase of airspeed. A constant or variable-pitch propeller maintains maximum available thrust through out the different speed ranges.

@igor-orzhevskii 2 года назад

Excuse me, Am I missing something at 5:10 ? As we gain the speed, the DRAG imposed by the relative airflow on the propeller's surfaces will be INCREASED (not decreased, as said in the video, right?). That's the reason we change the pitch to a higher angle (i.e., lower RPM), so propeller airfoils will be more streamlined into upcoming flow of air.

@adenpoller5121 3 месяца назад

This has to be the greatest explanation of this topic. Thank you

@ryans.5998 Год назад

If the manifold pressure continues to drop as you climb, wouldn't that mean that you would have to continue to open the throttle until you reach your cruising altitude? Would there ever be a scenario in which you're cruising at wide-open-throttle in order to maintain the proper manifold pressure (while the prop lever is pulled back a bit in order to reach the desired RPM)? In this case, would the efficiency primarily come from the higher altitude, which calls for a leaner air-fuel mixture (as opposed to the constant-speed prop itself)?

@c123bthunderpig 3 года назад

Great video, spot on. Too bad the world is in such a hurry, and aviation could stay with props.

@billboyd4051 3 года назад

Thats why we have sport aviation.

@iGemera 2 месяца назад

thank bro

@RaysDad 5 месяцев назад

If an airplane has oil temperature, EGT, and fuel flow gauges it I suppose it might work at cruise to set the manifold pressure so the oil temperature isn't too high, set the mixture lean or rich enough to lower EGT, and pitch the prop for low fuel consumption.

@MrSuzuki1187 3 года назад

Pilots transitioning to a plane with a constant speed prop need to know this very important fact. Full throttle is not full power unless the prop is turning at Max rpm. The formula for shaft horsepower is; prop rpm x torque x .00019 = shat horsepower. As can be seen, if the prop is turning at less than Max rpm, shaft horsepower will be less than maximum. Also, the prop is more efficient and makes more thrust at high rpm than at low rpm.

@talik777ful Год назад

Hi! How you did this changing pitch blades? In which CAD? Ty

@DreamlinerB777 2 года назад

Such a f!@#ing great video. Thanks!

@ben3989 2 года назад

It’s very much like shifting to higher gears if you want to think of it that way.

@juanfranciscorocchia9493 Год назад

Why the relative air will change in direction?

@hecklepig 3 года назад

If the engine and prop works forward of the CG its a puller prop, if it works behind the CG it's a pusher prop. So no, the aircraft is being pulled through the air not pushed.

@TiagoSeiler 2 месяца назад

29.92 is standard pressure at sea level. Can't you have greater pressure at SL, for example, on a cold day?

@mtcondie 3 года назад

Can I get my high performance and complex endorsement now?

@deans4x4 3 года назад

I believe you can log this time toward a RU-vid Aviation Expert Certification.

@hmleao 8 месяцев назад

That's very good explanation but there's something I can't get my head around. In the example at 3:30 there's coarse pitch with 14 pressure 2100rpms and fine pitch with 17 pressure 2500rpms producing the same thrust. So why for takeoff it's recommended max rpms with max pressure that will give fine pitch? Wouldn't be better to find a position with less rpms and higher pitch for takeoff? I guess I'm struggling with the idea of having more rpms with less thrust if you could have the same with less rpm.

@daviddavids2884 7 месяцев назад

information one thing that is not mentioned is, a prop is most efficient at around 2400 rpm. so it is desirable to maintain that rotation rate. as a result of the relatively large radius of a propeller, the engine of a prop-powered plane operates at a mechanical Dis-advantage, at all times. the analogy of gearing is useful, but not perfect. a low gear equals High reduction, which causes the engine rpms to be high. in gearing, reduction converts rpms to Torque. in the case of a propeller, a similar result is achieved with higher engine rpms, and a Reduced prop blade pitch. (i have not tried to answer your questions, directly.)

@BtcSimmer 2 года назад

Throw the power away Reign the power in Thank you!

@dt10825 3 года назад

Like everyone else is saying, GREAT video. Interesting how the rest of your videos are super random

@ecnivo 3 года назад

Haha, I get it! I made this video for fun, just like my others; but I'm glad everyone is enjoying it too! Thanks to all your support, there's another one in the works ;)

@Name-ot3xw Год назад

Its funny because while I assume most pilots don't understand how these work, their mechanic has to even though the mechanic doesn't really care.

@gyshalom Год назад

the torque grows with rpm

@Brian-1948 3 года назад

I thought manifold pressure us a negative pressure not positive so 29.92 is the lowest pressure not atmospheric pressure.

@herzogaero 3 года назад

throttle full forward = throttle flap fully open = engine can breath regular atmospheric pressure (suck on intake stroke) - throttle closed = throttle flap partly closed = engine breathes through a resistor (like your corona mask) thats why the pressure is lower behind the flap (closer to the intake valve - this is also where the pressure gauge is) - 0 on the gauge means full vacuum, 29.92 is atmospheric pressure = this gauge is a absolute pressure gauge - its reference is vacuum - so there can be no negative numbers

@Brian-1948 3 года назад

@@herzogaero My mistake, I did not take notice of the ABS on the displayed gauge. Thanks for the correction, I'll go sit in the corner quietly.

@karhukivi 3 года назад

Pressure is positive, from 0" to atmospheric, 29.92" as you say.

@incompressible01 Год назад

Torx ! 1:20 🙂

@mikejerman1912 Год назад

I just watched your video....You got the manifold pressure completely backwards.

@Mayhem6633 2 года назад

I don't understand the name "constant speed". Why is it called that? The propellor rotation speed and the aircraft speed varies. What speed stays constant? On the other hand, you mention the governor which maintains constant torque by adjusting the propellor pitch given the manifold pressure. So why isn't this called a "constant torque" system instead? I'm confused.

@VercilJuan 2 года назад

The "constant speed" refers to the constant speed or rpm of the engine

@larrymcintyre5693 3 года назад

Act, it isn’t complicated to operate a constant speed prop

@matthijsklomp 3 года назад

Constant propeller speed = constant rpm

@AssyrianKing4ever 3 года назад

07:00

@huseyinsezgin8604 3 года назад

Aircraft cvt

@chopperking007 3 года назад

So in a dog fight everything goes forward

@Raythe 3 года назад

Vertical helicopter. Go it. Next question

@dinosaurcomplaints2359 3 года назад

I like the way engine manifold pressure and vacuum are opposite. But remember, that figure will change with altitude and meteorological conditions.

@alexandern8hgeg5e9 2 года назад

3:21 same fuel, same rpm, more pitch on the left,... means more torque. Efficency may be better but fuel can't be exactly the same,...

@4stringmanagmaildcom 3 года назад

You call it constant speed but talk about changing RPM. I still don't get it.

@catocall7323 3 года назад

The governor will keep the RPM's at what you set them but you can change the setting.

@XPLAlN 3 года назад

What he said. When you have set your rpm using the prop lever it stays constant even if you move the throttle (unless you reach the limit of the governed range when it behaves like a fixed pitch).