hi compressions

[Woodd, Michael]

>You could spline a single shaft to keep it from spinning also.  But, valves 

>rotate now by design, right?  Why, and what would happen to an oddly shaped 

>valve that couldn't rotate?

>- --steve

I guess your thinking that cos valves rotate, that they more or less 
self-lap
themselves to ensure a continued seal over a longer period of time.
Probably right too, I guess only experimentation would show to what
extent.

Mike