Ed, here is that PSRU gear data.

   Paul Lamar


What I was'nt aware of is that both the front and rear planet use the
same sun gear. Both front and rear planet will give us a clockwise prop
when looking at the front of a pusher aircraft, is that correct? I have
been under the impression that the planet set reversed the rotation
direction. But the diagram shows clockwise for the 2.85 and 3.17.

Does'nt this mean a pusher prop will need to turn opposite direction of
the tractor prop? Hence two prop directions? Not a problem I guess,
there are plenty of pushers around.

Did you look at the prop on the Kestrel?

Ed Carver

Looks like a stock Hamilton or Hartzel 4 blade.

We don't need no stinking constant speed! We got P-power power to burn :)

250 HP in most experimental s is more than enough with a fixed pitch cruise prop for most runways. You don't need it down low but up high it pays off big time.

Paul Lamar