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Here is an interesting chart I found in Marks. You are unlikely to
do better than CW unless of course you go with mechanical turbo
compounding. The V8 data is a bit pessimistic IMHO. V8's are bad
but not that bad :) I think the reason the Sulser ship engine is
so good is it runs at 100 RPM. HP lost to friction is friction
drag times RPM square or some such. However you pay big time for HP to
weight ratio with a low RPM engine. Notice the BSFC of diesels
gets worse as they approach their RPM and HP limits.

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Okay, Sulzer it is!
Now how are we going to build an airplane around that!

Check it out:  http://www.bath.ac.uk/~ccsshb/12cyl/

Thomas J.  :)

It may be 5,500 HP but I don't think we could ever design
an airplane to get it off the ground.

Paul Lamar
 
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