| inertia change at the end of each stroke, but it's offset by the other pistons which are not changing direction (midstroke) at that instant. Think of it like this: Neglecting friction, if you were to spin your crank/rod/piston assembly inside your block, would it come to a stop by itself? Nope. Weight of components has no direct effect on constant-speed operation aside from friction issues that arise from increased normal loads.
----------------------------------------------------------------------------------- "Let's make like a baby and Head Out" - Jimmy "Funk you very much" - George Clinton "If I had a million dollars? ...two chicks at the same time" SoCal... Stoked not to be NorCal
 
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