Thank you for the prop hub information.
I'm building a RV9 and plan to use an alternative engine 13b.
The RV9 is rated for 160 hp only, and planing to build the psru my self.
So I assume the # 2 prop hub will be the correct size if I plan to use an,
Electric adjustable pitch prop. And Id like the prop to turn right hand.
Is it possible to have the sun gear locked and the planet gear spinning?
Thus turning the prop shaft right hand. That means the sun gears hub,
has to be machined off.Could any one update me on that?
thank you.
Henry.

The electric constant speeds are probably available for both
the SAE #1 and #2 flange but double check.

The way you do it is lock the ring gear to the housing, put power into the
sun gear and take power out of the planet carrier. Using
the Ford A40D planet set you will get a 2.85:1 gear reduction.

With this design you can use an SAE #1 flange hydraulic constant speed prop.

Paul Lamar ...No rotor no motor.

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