The RX8 drive shaft is perfect for our needs.
Designed to run up to 9000 RPM and sized exactly
right for the rotary torque. Since the engine is
in the extreme rear of the VTOL canard air craft for weight
and balance reasons  and the gear box is in front for prop
shaft reasons we need a drive shaft to bring the power forward.
-- 
Paul Lamar ...No rotor no motor.

Paul,
The old style Universal Joint leaves a lot to be desired - have a look at
the Thompson Coupling.
George ( down under)

I am not going to reinvent the wheel. The drive shaft is already
bonded to the U-joint. I would use it as is. Unbolt it from the RX8
and bolt it into the VTOL canard.

Paul Lamar ...No rotor no motor.

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