"M" wrote in message
oups.com...
The R has plenty of power climbing at the sea level. Both the R and SP
have the same engine and the SP has a finer pitch prop, so it climbs
better. Due to the coarser pitch prop, the R should have a slightly
better fuel efficiency at the same cruise speed as the SP.


How is it that with the same engine, they develop different HP ratings?

R = 160 BHP @ 2400rpm
S = 180 BHP @ 2700rpm

Is there a governor on the R model?

Jay B