The helical gear thrust bearing ID and seal ID must be larger than the

sun gear OD

unlike that shown on this drawing. Then you use a split keeper.

Something like a

valve stem keeper to feed the gear thrust load into the bearing. I am

sure Don

Dunbar found that out already when he first tried to put his together.

I'll do a 3D of this trick if you need one.

I had Tracy just press fit my sun gear on the shaft. My theory (to be

tried on the dyno

and not in the air) is if it slips it will friction weld itself to the

shaft.

Here too is a picture of me and Ken getting ready to go down and land in

the river.

Paul Lamar

Here is the 3D of the spline eliminator. Bearing and shaft seal not shown.
Might as well throw in a few more pictures of Ken's Coot. Here we
are on base leg to Ken's home airport. You can just see the blue nitrous

oxide

bottle peeking out behind the pilots seat in the next pic.

Paul Lamar

Ken,
I've gone away from the spline idea as well and lean toward Paul's idea
depicted in his drawing of a integral mounting plate and sun drive shaft.
George (down under)

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