In short no! but an estimate is possible.
the G4 does 130kph flat out and rotary engines do about 1300rpm
Based on these figures the plane moves about 36.11 meters/sec.
The engine does about 21.66revs/sec
Therefore 36.11 divided by 21.66 gives the pitch of1.67 meters or 65.75 inches which in case you don't know is how far the plane moves for 1 revolution of the propeller.
mik
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