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  #1  
Old January 25th, 2008, 10:44 AM
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Stephan Laputka
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Questions about engine design

I was wondering, other than making it fit in the engine bay, what are the differences btw. say a 90 degree piston alignment vs. 45 etc. How does this change the performance of the motor if at all? For a project I'm trying to design an opposed cylinder motor and the closest thing I have for comparison is a boxer engine but that has cylinder heads and only one crank shaft. I'm trying to see how performance would change with an opposed cylinder motor in a V configuration but I not sure how piston angle alters performance..
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  #2  
Old January 25th, 2008, 07:53 PM
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Andrew Najarian
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I'm confused...if its opposed it can't be a V and if it is a V it can't be opposed. They are mutually exclusive terms as they have been explained to me.
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Old January 27th, 2008, 01:06 PM
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Stephan Laputka
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I know, I was trying to figure out what would happen if you placed an opposed cylinder arrangement in a V-config for matters if space. I don't think it's been done and I'm sure it not as efficient but I was trying to figure out how less efficient it would be.
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Old January 27th, 2008, 01:08 PM
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Old January 28th, 2008, 08:38 PM
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What do you mean by opposed cylinder? Normally that means that there is one central crankshaft, and the cylinders are 180degrees from each other. A boxer engine is an opposed cylinder engine.

Or do you mean one of those funky things like a Napier Deltic engine?

-Hans
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