Napier Deltic Engine

[fairyscout1]

very clever idea!!! (...although there is one small mistake in the motion of the air pump pair gears in this video)

[mekanizmalar]

@fairyscout1 Thank you. Yes I know the problem. I have to put annotation for that.

[symmetry08]

too many parts. Not suited for transportation department

[simaritalia]

scrive simaritalia da italia , con questo tipo di motore le br avevano messo in circolazione un locomotore il famosissimo DELTIC credo che ne abbiano ancora qualche esemplare ....

[simaritalia]

una volta sola mi è capitato di mettere le mani su uno di questi motori , era un motore navale montato su una barca da pesca molto interessane e molto compatto , con un " rumore " molto particolare ... complimenti per il video e le spiegazioni grazie

[mekanizmalar]

@simaritalia Thanks to Google translate for translating your comment for me. Thanks for your nice comment and explanation where you used this engine.

[simaritalia]

un grande motore ,bello a vedersi e anche molto funzionale navale e ferroviario !!!!

[mekanizmalar]

@simaritalia Thank you for your nice comment.

[sfenodonte]

@simaritalia Fantastic, a myth, sin that the napier it has closed

[ladams00]

The Napier Deltic is my favorite :)

[mekanizmalar]

@ladams00 It is one of mine too.

[kbent88]

so its a super charged 2-stroke fuel injected diesel engine? very nice. Too many parts. 3 crank shafts. 3 superchargers, but very cool

[TAPriceCTR]

hmm power to weight & size improvment from being 2 stroke.

power to weight loss not changing as the linking gear equals a flywheel

power to size. bigger but flatter. all evens out

efficiency, 2 stroke diesels do not lose efficiency like 2 stroke gas, a little efficiency lost having to gear link 3 separate drive chafts.

improvement... a single blower to feed all 3 would not spend as much time fighting sealed valves. I like it.

aside from geometric needs what are any disadvantages?

[RamsesTheFourth]

its really cool idea but... you have actualy 3 engines .. every crank shaft is making momentum by itself for itself. if you know what i am poiting at. you need to combine power of all three pistons together somehow. i am sorry for my english :)

[mekanizmalar]

@RamsesTheFourth This engine invented by Napier of Manchester, England. It has been used in some military ships and diesel locomotives.

[fergfergferg123]

@RamsesTheFourth This engine pioneered diesel locomotives, i have been around for decades! I dont think a youtuber can question it!

[AwesomenessPrime427]

@RamsesTheFourth actually the cranks are most likely connected somehow because what if one piston was on an intake stroke while the other (in the same cylinder) was on an exhaust stroke? doesn't make sense

[Oldbmwr100rs]

@AwesomenessPrime427 There has to be timing gear set keeping all the crankshafts as well as blowers operating together.That engine must have had quite a large gearset to withstand all that torque,but with that design it must have had a great power to weight ratio.

[NLDommelsch]

@RamsesTheFourth if he'd connect all three shafts to another central crank shaft, he'd loose to much momentum to have a succesfull engine.

[Ledgar69]

@RamsesTheFourth Owned

[alexd92007]

which program did u use to animate the engine ??

[mekanizmalar]

@alexd92007 Adobe Flash

[VoenOVG]

Мде, огромный занимаемый объём, сомнительная надёжность, три насоса, три коленвала, да ещё как их движение на один вал передать. КПД ниже плинтуса.

[mekanizmalar]

@VoenOVG I wish I could understand what you were saying.

[kennethcason]

@mekanizmalar Google Translate: MDE, the huge volume occupied, questionable reliability, three pumps, three crankshaft, and how their movement on a shaft to transmit. Efficiency through the floor.

[trab1608]

@mekanizmalar google translate

[ben44rain]

@mekanizmalar from the vaults of google translate- MDE , a huge footprint , questionable reliability , three pumps , three crankshaft , and even as their movement on the shaft of a transfer . efficiency through the floor.

[mekanizmalar]

@ben44rain Here are two comments that I find from internet about these engines.

The first comment is "These engines were very powerful for weight, and efficient, which made a single railway engine able to sustain 3,300hp., unlike to conventional engines, 2 or 4-stroke which could make little more than 2,000hp."

The second comment "Deltic Engine only real Achilles Heel was a tendency to leak oil from the crankcase into the bottom cylinders when not running:."

[winterstellar]

@ben44rain Yeah, lucky then that it became one of the world's most successful marine-train-and electric powerplant engines then, isn'y it? The Napier sold in vast amounts and was used for decades and decades and still is in places. It was and is a brilliant engine and a wonderful pieve of engineering. No wonder the good old Napier has so many fans, me included!:)

[enanius11]

che, como admite y como escapan los gases ahi? :|

[Arabhacks]

Can you just imagine if the timing belt/chain broke?



[marktwainisgod]

This is really interesting. It seems like you would get a lot more compression from less crank throw with this engine. Also it would utilize more released pressure as opposed to just throwing it out of the exhaust like on the shorter stroke engines. This is really cool. Also I noticed that your blower lobes are actually turning in the RIGHT direction like a blower should. You ROCK!!

[JaxxBat]

Problem is it solves no real problem with internal combustion..

[72plyfury]

Ha! one of the blowers is spinning backwards!

[kodiak410a]

Only one of the superchargers is turning in the right directon.

[jamzie89]

@kodiak410a no 1s turning in the wrong direction

[kodiak410a]

@jamzie89 No sir. The top and left superchargers are turning in the wrong direction. Due to their rotation, they are appear to be drawing away from the engine.



[jamzie89]

@kodiak410a thats the way they spin, they spin with the air goin around the outside, because the air cant go through where they mesh together

[kodiak410a]

Uh......no. The meshing of the lobes is exactly what produces the compression of the air and forces it into the intercooler (where applicable) then into the engine. But don't take my word for it. I will let my Masters Degree in Forced-Induction Technology, specializing in internal-combustion engines from Banks Forced-Induction Corporation speak for itself. Best 4 years of my education. I would do it again in a heartbeat and would recommend the program to anyone who is serious about the trade.

[ChilesGreen]

This engine with three synchronized cranks and opposing pistons is ridiculously complex. 

[drainocleanser]

This engine has a very sinister homosexual overtone to it. Just saying.

[winterstellar]

A triangular Detroit engine! Cool!!

[FurryWereWolf93]

How small can this engine get?

[mekanizmalar]

@FurryWereWolf93 No idea at all

[ArcturanMegadonkey]

excellent video, but it does look like the exhaust piston and inlet piston reach TDC at the same time where as the exhaust piston should lead by 20degrees.

[TheH78]

Excellent video pal.

[mekanizmalar]

@TheH78 Thank you.

[ralphie092]

is the pump at the bottom not rotating in the wrong direction?

[ralphie092]

is the pump at the bottom not rotating in the wrong direction?

[Snoep76239]

@ralphie092 No it's the other two. Blue seems to be the intake...

[justnotcricket]

One of my all time favourite engines, thank you for the animation.

[machokyle45]

doesn't look very practical

[mekanizmalar]

@machokyle45 I guess Napier of Manchester, England would not agree with you. His engine had excellent power-to-weight ratio and was very compact and used in variety of marine vessels.

[Skoda130]

@mekanizmalar But how did they cool it? It looks like it can develop quite some heat, especially inside the "triangle".

[CornishMorgan]

@mekanizmalar not to mention the class 55 deltic and the class 23 baby deltic

[MrJacob1777]

@machokyle45 oooo It is very practical! Very great design, very hard to work on tho.

[marklandynut]

On the Deltic its a gear train, which also drives the centrifugal blower at the front of the engine feeing all 18 cylinders.

Excellent animation, but I see you didn't get the phasing quite right. The cranks are set so the exhaust piston leads the inlet by 30 degrees. If two banks are set phased the same the third bank will be way off the mark. This lead also allows the exhaust to open first and the inlet to close late giving good breathing and proper supercharging. 88.9 litres. Up to 4000bhp.

[mekanizmalar]

@marklandynut Thank you for your contribution with your excellent explanation.

[jeffrey19621]

Great animation . I have an old book describing these engines although the are mant pics this describes best for me .

Thanks,

Jeff

[mekanizmalar]

@jeffrey19621 Thank you Jeff.

[R75Sidecar]

How are the three cranks connected ?

[mekanizmalar]

@R75Sidecar The there crankshaft know as AB, BC and CA are geared at the back end of the engine. These gears are called as 'phasing gears' and keep three crankshafts synchronized and used to drive additional components such as oil and water pumps. The output power is transmitted to a single shaft located at the center of the engine from phasing gears.

[BNSF5608]

@mekanizmalar Except to keep the engine balanced, they designed it to have two cranks go one way, only one go the other.

[MrTpengineer]

@R75Sidecar Gears or heavy duty chains.

[keyboardjeff]

What program did you sue to create this animation? I'd really like to know.

[mekanizmalar]

@keyboardjeff Adobe Flash.