In this video, you'll see how the engineers carry out the performance test for a ship's main engine. pmax pcomp Chief MAKOi Seaman Vlog === Credits to El Rich / @chiefelrich6663 Lecky Louie / @leckylouie
And so far the most powerful TSDICE I’ve ever heard of used in freighters is the Wartsila Sultzer RTA96-4C. The 14 cylinder variant makes about 109,000 HP and 5.6 million lb ft of torque at just 102 RPM. That engine is bigger than the three story house I grew up in!
@@InsanePacoTaco Not that much. For the same power you may have lower rpm and higher torque engine, but that would then require for the same speed steeper propeller blade pitch angle, so (assume the losses as the same) the resulting thrust force would be exactly the same. Actually co paring the torque is irrelevant, even for a car dynamics, unless you have other parameters (rpm range, inertia of the flywheel,...) aligned as well (well when speaking only about gas car engines, the physics around gas combustion is what leads to the other design parameters to be alike so comparing torque figures does make sense there; but comparing torque figures between gas vs electric makes no sense at all). Otherwise what matters is the power as function of where you are in the rpm range, plus how much inertia energy is in the moving engine mass. For different torque and rpm you will compensate by just a different gearing.
I love that you show your guys in full safety gear being deliberate and cautious. Workers acting cool and nonchalant without safety gear sets a bad precedent.
@@TheEvertw My guess would be the high pressure that comes out of that piston tube, you saw it in the calcs how high it was, if that blows into your eye, you might be blind.
There's a lot more going on in everyday life than a lot of people realise and give credit for. Many go throughout their lives without understanding or giving a 2nd thought what makes the wheels turn thusly making their lives easier. Just the simple nut and bolt that holds our lives together is a magical thing.
As someone that has had to repair such instruments I appreciate the care the engine room tech is taking with the cable connectors. Those things are NOT cheap and unless you have spares? Not something you want broken while underway!
It boggles my mind that you guys just have, like a 3/8 in?, valve directly into the combustion chamber. That puts the scale of these engines even more into perspective. I'm always looking forward to your more in depth technical videos, AFAIK no one else makes this sort of video. Also maybe cylinder five needs a bit of a hug and some encouraging talk.
Very good Chief. I enjoyed the details of the 'how to.' Being far out to sea, is reason enough to know that your power plant will get you safely to the next port.
I remember, we used the old device. The device was kept secret by Chief and 2nd Engineer and test were carried out by Chief engineer or 2nd engineer along with Diesel Mechanic when the juniors were out of Engine room. However, when I became 2nd Engineer, I allowed all my engineers especially the Junior Engineers and 5th/4th Engineer to take measurements when ever the weather was calm. Those black sheep Chief and 2nd Engineers and Diesel Mechanics are now in grave or death beds.
@@rherman9085 They don't want that the juniors learn the use of the device/ trick of the trade. The owners should call them for their ships regularly. No other person are employed on that vessel
@@sohailnomani I kind of figured that. Hey thanks for the reply & the info. Though I am learning (for the fun of it), kind of cool things to hear about. Thank you!
@@benjurqunov yes. We called them Commodore 3rd Engineer ( they were in every rank ) who used to hide every tool from juniors. Who used to send juniors to search for tools when they were making some adjustment ( tools were in their own pockets) so that the juniors don't learn any technique.
Dobson and Mcguinness indicator if I remember correctly from over 50 years ago. There was one on a single cylinder diesel engine at Guildford College of Technology. Bits of sting and paper allover the place but it worked. Probably before you were born chief. We tied a bit of string around the govenor, apprentices will be apprentices. It was on the second floor. Thank God we managed to cut the string in time or it would have been on the first floor.
@@charliepearce8767No, the sump is part of the ships structure and underneath the engine. Oil pumps are large motor driven affairs located at the after end of the engine as ships tend to trim by tbe stern, so the oil is deepest there. Its still possible to loose suction on the oil pump if rolling badly, which will start to shut the engine down, but you roll the other way and oil pressure is restored. This can be reduced by adding more oil to the sump. You have suction filters to protect the pumps and much finer discharge filters to protect the engine, much the same as a car engine. You also continuously centrifuge the oil through a purifier to remove water and solids, but usually water, due to condensation, leaks from water cooled pistons if still fitted. Any liner leaks usualy appear through the scavenge drains on two strokes. To have a dry sump means the sump has to be higher than the engine and this has an effect on stability and more pumps. The bottom of the crankcase is dry as you have to stand in it to carry out certain inspections and overhauls, but below the steel you are standing on will be the ME Lube oil sump. There are a couple of mesh covered drains into the sump from the bottom of the crankcase, one forward and one aft usualy.
Hi from uk Chief MAKOiand crews👋👍 thanks for these on board activity and maintenance schedule routines 👌 really appreciate you taking time for us on board and thanks to for crews patience when they surely just want to get job done👍 it amazes me how times change but the technology stays the same its just advance thru computers instead of manual input👍 thanks for your time and be safe see you soon👍👋
Gosh, Chief, this brought back memories of when I taught engine theory at an aircraft mechanics school. We used PLANK as our formula. This was for radial aircraft engines as used during WWII. I’m 80 years old now so,that was a long time ago. Great explanation! Thanks, Chief
Fascinating. I was surprised at the apparently small difference between the compression pressure max. and the combustion pressure max. I would have expected a much higher differential. Then again the intake air is supercharged, so it’s already under more pressure than ambient. (I was a small engine mechanic, so this is the other side of the universe for me!)
The diff between min and max you see is normal for ICE, no matter the fuel. Also note that the peak pressure occurs at around 20~25 degrees, that is around 30cm from TDC, while the pressure before combustion is at TDC.
Having been a marine engineer for many years - it is great to see all the wonderful equipment you have these days to do a professional job. I remember the old indicator very well. Nice to see it used. Bought back some memories.
That was very interesting! Especially liked the old ‘analogue’ tools using recording paper and the planimeter - never seen one before - I was wondering if you’d have to count little squares on the paper to get the area!
Very very interesting, excellent explanation on measuring engine performance, great to see the analogue instrument as well, brilliant. Thanks for sharing.
Missing your updates. I check this site several times a week. Hope to hear from you soon. USN--MM3 Qualified 1200 # steam and auxiliaries and carry a MN steam engineer's license. It so cool to see the advances in engineering since I steamed the open seas, years ago.
Chief, Makoi, I'm a Machinist who loves my career even though as a child I wanted to be a Chief Engineer on a cargo ship. Well, life happens and I have no regrets. Thank you for your channel and your commitment to quality and training. I support all working young men in trades. They are all under-appreciated in my view. Tell them for this viewer that I thank them for their hard work. Maybe there's a little pizza money for them in this gift. Thanks again Chief and crew!!!
Very nice, I enjoyed watching this, thank you! I've always been fascinated by marine engines, the bigger the better, and when I was in my teens I had a cross-section of a MAN marine engine poster on my wall, while my classmates had photos of girls in various states of undress!! 😅
Excellent video Chief! It's worth mentioning that when coordinating with the bridge for the test, request that they turn off the fire detection loop in the ER. Failure to do so will insure that after a couple of shots out of the open indicator cocks the fire alarm will sound and that anybody trying to sleep will be scrambling out of their rack and heading for their muster station 🤣
I'm a radio and satcome opperator and maintainer and I saw a phase diagram in the graph. Then I thought about it and it really is, just a mechanical phased array. I love how interchangeable these conscripts are, and I GREATLY appreciate how your videos are helping me learn. Thanks Chief.
Chief, I really enjoy your videos. Being a diesel mechanic since the early '70s I especially enjoy the engine videos. Since I worked mostly on heavy equipment and trucks I always learn something from your content. Today I learned that Pi r squared (sorry I don't have a fancy scientific keyboard ) can be represented as Pi (D) squared/4. I remember the needle and paper days. I always kept learning the new technology and am still a viable commodity today. I watched your video about how you went back to the academy to learn electronic engines. That was a great move. I have spent a lot of time in school over my career and never regretted it. I tell the young'uns keep up or get left on the side of the road. Or left in port in your case. Keep up the good work, I dig it. Thanks, Robert
Thanks chief MAKOI I've been watching all your videos and its really a big help for my future I'm currently a second year marine engineering student thanks for sharing your amazing experience and teachings i hope someday i will be like you so i can also share my knowledge to others thanks chief you're my inspiration.
Excellent video! Fascinating to see the care that goes into running such a beast properly. And, yes, I am an (EE) engineer, so I do understand what you are doing.
I wish my dad was still alive 😢. As merchant sailor & engineer during the late 1940s and early 1950s I think he would have found this interesting to watch. Still have one of his textbooks from his days at the ship engineers school/course. It's thicker than a bible 🙂.
As all the comments I read say, " another great video". The tech yes, but the calm, and precision add to the overall impact. Everything I know about your work comes from this channel. Thank you. I am a retired engineer in a completely different field. So now my minutiae. When coiling test cables, or any cables, using the over/ under method results in no loops or kinks. This is often remembered by saying " over worked / under paid." Lastly, when working with large heavy cables, making a figure 8 on the deck, then picking up the ends, folding together, gives the same results. Thank you again Chief!
In old money, it was P.L.A.N/ 33,000 but with metrication and the right units the 33,000 was removed from the equation. 33,000 was foot pounds in a Horse Power. Note this is Indicated Horse power IHP, the actual raw power produced in each cylinder. At the propellor shaft you have shaft horse power which takes into consideration all the frictional losses by the time it gets there. You can also work out the Brake Thermal Efficiency which starts with Calorific Value of the fuel burnt, IHP then you have all the losses, friction, heat lost to cooling water, exhaust gas, lube oil etc. Some of these losses are recouped via the turbo charger providing scavenge air pressure, waste heat boilers to produce steam for domestic and fuel heating but even on large ships they produce enough exhaust gas to produce steam to drive a turbo alternator for electrical power supplies. Cylinder Cooling water is used in a vacuum evaporator to boil sea water at approximately 60°C to produce distilled water for domestic use and ER use. Apart from a small vacuum pump and freshwater discharge pump very little power is used to,produce the fresh water.
Hello everyone! So I've never been on a ship or ever worked on an engine of this scale. However, I know Diesel through and through. Both the analog and digital techniques make entirely too much sense to me. This is amazing. Thank you for another great video Chief. Kudos. Keep doing what you do. Stay away from the hamburger pump when taking measurements. Be safe. Be well. Good day!
Thanks for doing and uploading an interesting and informativ video. Fun to see that tools for measuring has evolved a bit since I was at sea last time. Greetings from Sweden //Karim (worked as motorman when I was at sea)
Greetings Chief, It makes my morning to sit down with a cup of Jo and see that you put up another video. Put four wheels under those bad boys and you've got one hell of a scooter
Yes engine power and efficiency directly impact the biggest cost of running the ship, fuel use. You definitely want your engine to be running at the absolute best efficiency while at sea, so as to keep that fuel consumption down to the minimum.
Thanks a lot, Chief. This content is very helpful. Need more discussion of purpose of the angle encoder connection, Frequency divider box & junction box.
Smashing and thank you very much. I was keeping up with you on PLAn until you started talking metric 😁🤣. So glad when you then gave us the answer as "Indicated Horsepower" Rgds. Peter
Cool video Chief, I hope to use it in my physics classes when I teach cyclic engine process for thermodynamics to show how the area of the pc diagram is computed.
Hej Chief ! Thanks for the lesson. I’ve seen that thing before, but didn’t realise a string advanced the paper. Thank goodness for electronics ! Btw, Your vessels are impressively clean and tidy.
Hola Chief Makoi. My side is on land, but ships have always got my attention. This was a very interesting and educational video. Thank you and take care.
You need to teach your cadet how to properly coil and store the cable to avoid the tangled mess and the struggle I see on the video. Search for the "over under" method. They never teach this at school, and it is one of the first thing I explain to them. If they coil the cable like a rope, as untrained people usually do, they impart a twist at every turn. Long and stiff digital cables have a internal structure that behaves like a spring. Tension is stored on the cable; it will then uncoil in a messy way at the next use. After a few mishandling, the cable looks like 4:21. Digital signal attenuation will rise due to the shifting and twisting of the complex internal cable structure, and after a while the cable may ultimately fail and/or become impossible to coil in a orderly fashion due to external sheating damage/deformation. That's a shame, because cables are expensive and should last a long time when properly handled. I work in a completely different industry, but I see that some practical issues are the same.
I second this. I’m in the robotics and automation field and I’d venture a guess that 3/4 of the problems we see are cable related. Seriously, cables need to be treated very well.
As an engine room volunteer aboard the museum ship Liberty-ship class SS JOHN W BROWN, powered by a 2500 ihp triple-expansion reciprocating steam engine, I am amazed at the number of things that have carried over from reciprocating steam engines to diesel engines. The manual method you show for measuring cylinder pressure and converting that measurement to horsepower is almost exactly the same as that used on steam engines. Similarly, the crosshead guides, connecting rods and crank webs you showed in your video a few days ago are also almost identical to those on a reciprocating steam engine-- except that in most steam engines all this machinery was out in the open and you checked the temperature and degree of lubrication of the connecting rod bearings by touching them, while keeping your hands as far away as possible from the rotating crank webs.
Good morning CHIEF, A fire has erupted in the funnel of an occupied Carnival cruise ship while docked at Turks. This just occurred recently. What, in your opinion causes a raging funnel fire. I watched as the crew used on board fire lines, the water spray was at least 15 feet short of hitting the flaming funnel, no injuries reported at this time. Peace always.
