so in reply to the fluid thermodynamics of maximun rpm
bare with my comments as I am dusting out a remote corner of though from decades back.
the engine's "redline" is a function of piston speed and ability of the components to keep it attached
the engine's power "limits" are
1)a function of valve train speed and the springs ability to keep it on the cam
2)power produced is a function of flame propagation of the fuel/air and piston speed.
there is probably more key points to engine design, but I just was able to pass that class with extra credit work
thus a short stroke to reduce piston speed, exotic valve train, and highly explosive fuels would let you easily reach the rpm that will throw pistons off the rods
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