Thanx for the reply, i actually messed up in my previous post. the
intended numbers are 3200 to 3500 rpm and the propeller spinning approx
2500 to 2700 rpm.


why isn't a car tranny good ? it seems to do just what i want for
years in millions of cars reliably? Isn't the mated transmission made
to convert the slightly oval engine rotation into the circular motion
nec. for the prop? and also damp vib?


now the belt drive u mention seems reasonable but i really really don't
want my engine spinning faster than 3500 rpm:

thanx again

mrv