Re: maximum rpm, personal choice...
A measure of the maximum engine RPM is the average piston speed. This is used for engine designs from the 1960s at 18 m/sec. specified.
Our gray cast iron heavy A engine with uncertain mass balance should not be rotated beyond this limit.
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Beste Gruesse aus Deutschland,
Werner
Ford Model A, Roadster, 1928
Citroen 11 CV, 1947
Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version
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