Two stroke Tuesday

"Cé hé sin" (michael-m-mouse) 05/03/2016 at 14:48 • Filed to: Two stroke, MAN

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Meet a two stroke.

It’s a MAN B & W 11G95ME with 11 cylinders of 95 cm bore (hence the name) and produces 103,000 hp at 80 rpm. Yes, eighty. You could count the revs by yourself if you wanted.

Engine nerds can note that this is a seriously undersquare unit whose stroke is more than three times its bore. Odd things, marine diesels.

BmanUltima's car still hasn't been fixed yet, he'll get on it tomorrow, honest. > Cé hé sin 05/03/2016 at 14:51

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Also 6.7 million ft-lb of torque.

Cé hé sin > BmanUltima's car still hasn't been fixed yet, he'll get on it tomorrow, honest. 05/03/2016 at 14:57

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Yes, lots of power at very few rpm will do that for you.

Tekamul > Cé hé sin 05/03/2016 at 14:57

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11 cylinders, eh? I wonder what that firing order’s like.

BvdV - The Dutch Engineer > Cé hé sin 05/03/2016 at 15:00

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Wow, that means it has about 9.16 million Nm, or 6.75 million lb-ft for the people liking the imperial system. Or 4.82 million Nurples, if you’re like Torch.

Ash78, voting early and often > Cé hé sin 05/03/2016 at 15:12

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I wonder if the software can beat an emissions test.

Cé hé sin > BvdV - The Dutch Engineer 05/03/2016 at 15:12

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Yes, big diesels can do a lot of twisting. Only 4 or 5 bhp/litre though, but then again they’re more than 50% efficient.

Bman76 (no it doesn't need a WS6 hood) is dead, long live Bman76 M. Arch > Cé hé sin 05/03/2016 at 15:27

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They don’t hardly even sound like ICE engines when running, almost more like a steam engine.

You can tell a Finn but you can't tell him much > Cé hé sin 05/03/2016 at 15:40

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But two strokes have no torque. That'll never work.

Noah - Now with more boost. > Cé hé sin 05/03/2016 at 15:55

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Gotta service the valvetrain *opens door*

Cé hé sin > Noah - Now with more boost. 05/03/2016 at 17:27

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Yes, big things. They have steps down into the crankcase.

Cé hé sin > You can tell a Finn but you can't tell him much 05/03/2016 at 17:36

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H’mm.

103,000 bhp @ 80 rpm so:

103,000 * 5252/80 = 6,761,950 lbs ft. or 9,167,973 Nm.

You can tell a Finn but you can't tell him much > Cé hé sin 05/04/2016 at 08:34

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Ruining my bad joke with your logic and science and math and stuff.

Noah - Now with more boost. > Cé hé sin 05/04/2016 at 09:02

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so my assumption is that each lobe is machined then attached to the rest?

Cé hé sin > Noah - Now with more boost. 05/04/2016 at 09:47

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I suppose so as casting a thing like that in one piece (the crankshaft is something like 300 tonnes on the biggest marine engines) would be quite an undertaking.

Opposite Locksmith > Ash78, voting early and often 05/04/2016 at 12:24

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Lol