Here is what I've been working on as of late. Some ships had aircraft so I guess this stuff applies.
Ok this is the Crank Case:
Followed by the Cam Housing:
Rendering these parts is helping me learn cad software so its been worth while. Here is a video of an engine running (I cannot find one of the Edwards so you will get treated to the Hodgson 9.) I like little engines.
http://www.youtube.com/watch?v=uWePjHsFKtA
TommyL.