I've just finished and posted an MS Excel based piston speed calculator. It will calculate mean piston speeds and maximum piston acceleration based on physical characteristics of the engine.
Find it at: www.panyo.com/downloads Useful (?), Fun (?) I think so, but then I'm a bit of a gearhead (and CAD geek). At any rate, it came about as a result of Royce's question concerning the offset of cylinder centerlines. Going back to the original thread, if I had to guess, I'd put my money on settling that occurs in service. However Royce's question got me thinking... Fact is, the calculator doesn't come close to answering his question, but it gets you one step closer to being able to (or at least related questions). Michael Martin [EMAIL PROTECTED] ___________________________________________ Royce wrote: "I did, however, wonder whether there is a vertical force component associated with this mis-alignment that would help reduce the effective "weight" of the main rod. Any thoughts? royce in SB"
