Hi Jarrett,

I am not doing this because I think this is a good way
to make a twin pusher. As my old late friend Vance RIP
used to say I am doing it because it is an interesting project.
In the mean times I am waiting for slide throttle parts.

The problem with spiral bevel gear sets is the separating forces
between the gears. This amounts to a point load of about
a thousand pounds at 200 foot pounds input. The traditional
way of handling this is use big heavy bearings and a heavy
thick wall spool. I am thinking of using a large diameter, thin
section bearing to take the thrust load and a fabricated sheet metal
spool. The 3.5 inch carbon fiber prop shaft will be bonded
directly to the ID of the spool.

Consider the red device a rock solid buttress.
What does an FEA look like in the spool.
Material is 4130.

Thanks

Paul Lamar