<SNIP>

A [SINGLE CYLINDER] reciprocating piston four-stroke requires "two"
crankshaft
revolutions to complete its four-cycle operation. Accordingly, its
displacement is
that achieved at two shaft rotations. [I don't think so Rolf. Check Taylor]
I agree with almost everything except were noted above in brackets.
<SNIP>

Paul Lamar

Rolf, a single cylinder RPE displacement isn't measured at 2 rotations.
The calculation is simply the area of bore x stroke.
No allowance is made for the fact that the crankshaft must turn
through two rotations to run.

Bill Jepson



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