Why are the pistons in an engine always circular, anyway?
@Motodrachen I was wondering if it was just manufacturing or if there was some performance reason for it, so I suppose that answered that!
Why did they want more than one valve?
re: CW for length, Mechanical stuff!
@Motodrachen On the topic of circles in circles, you've reminded me that this website exists: http://packomania.com/