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
 metalspool. 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
Sorry Paul, just to clarify.. you want a 1000# linear force on
  the rim of the grey part as well as a 200ft/lb torque load at the
  same point?
  Any kind of finite geometry that I can use to put the load into [a
  hole or ...?]
I'll get the model in and ready for some loads :)
Jarrett
I don't need the torque load now. I am looking at some thin section
  bearings and I want to get an idea how the stress will look
  in the stationary ball race just behind the gear. I suspect the
 torque  load is inconsequential by comparison. The thin section
 bearing  goes between
  the grey part and the red part.
Paul
Alrighty, here's the results. I needed a 'point' to load to so I
 added a 0.5" boss [0.001" thick] to
 be the point where I input the load into the part. I made the back
 end a 'block' rather than a thin
 body [realized afterwards that might not have been what you
 wanted.. let me know and it's a
 simple change to fix if needed]

 I put 1000lb's into the 'point' and here's the results.

 Let me know if you need more done.. it's in there now so easy to
 monkey w/.

 Jarrett

 Thanks Jarrett. Big surprise to me the flange is taking all the
 deflectionand stress. That means the ring gear. Very encouraging
 for thin section bearings.
 We might have to put a bulkhead in the small end of the cone to
 stabilizeit but that will add very little weight. Can you do that
 and run it again.
 Add a disk .125 thick disk on the small end of the cone.
Paul Lamar

Ok, I think this is what your asking for [Section view pic]. Included the
results w/ the the model modification.

Jarrett

Yes exactly. Amazing what a little metal can do put in the right place.

Paul Lamar