The Max Piston Speed calculator APPROXIMATES the maximum speed of the piston based on the stroke length and the RPMs.One rev
INSTRUCTIONS: Choose the desired input units (e.g. inches or centimeters) and enter the following:
Max Piston Speed: The Max Piston speed is in Miles Per Hour, but can also be automatically converted to SI units (meter/second, kilometers/hour) via the units pull-down menu next to the answer.
The Max Piston Speed occurs at approximately the mid-point of the stroke. According to the reference text (below), this equation approximates the speed at that instant.