SpitfireS

Oh wait.....

dwight

I considered that one as well (difference between the surface area and projected area) but I felt one example was enough and I had already written one and that was enough. We could also add talk about relativistic length contraction and reference frames to say that the area of the yard depends upon where you are.

I guess the point you're missing is that mean piston speed is that simple. It's not complicated. It doesn't have anything to do with instantaneous piston speed. If you wanted, you could integrate the piston velocity equations (which is a silly exercise because it just brings you back to the displacement equations which were used to derive the velocity equations) to find the mean value. You'd get the same formula for mean piston speed.

I chose obfuscation instead of "confusing" because there is a big difference between the two.
Obfuscation (or beclouding) is the hiding of intended meaning in communication, making communication confusing, wilfully ambiguous, and harder to interpret.

SpitfireS

Where did I state main piston speed is not simple?
When I posted - my first post in this thread - the link to the Wiki page I said (quoting myself..) "There is main piston speed AND there is true piston speed", followed by the link.
As in: in addition to.
Main piston speed is what it is, but it doesn't show / give you the full picture when it comes to piston speed during a stroke, there is more.

Why is it wrong to add (what I still think is relevant(*)) info?
Why do we have to shield the average s2ki reader from stuff they - according to you - don't want, and don't understand?
How do you know "they" don't want - or understand - it?
(*) - we're talking about pistons and cranks, there's a third peice of metal involved: a connecting rod.

Based on your interpretation of my first post.
And all I did there was saying: there is A (and I did not challenge it) and there is B (follow link to see what I mean)

Nevertheless: nice discussion
(NOT saying this is the end of it.. haha!)