The trick was to increase the input shaft diameter to 1.500 inch diameter rather than one inch like Tracy used. A whole raft of benefits came from that. Not the least of which it was much lower cost to machine and the joint between sun gear and shaft was much stronger. Dave Leonard broke one or two early gear connections.

We also applied some of what we learned on the time to climb 650HP coupling.

The shaft is off the shelf ground and hardened. Good for the seal. It can be drilled out with a one inch drill to cut the weight.

Chris Hoskins in NZ is working with the many extended point set screw idea to substitute for expensive splines.

Paul Lamar

Hi Paul,
It is a bit difficult to see on the photo, but is there anywhere for the deformation of the rubber to go as it comes under load?
Andrew Campbell.

Not at them moment. We are going to run it up full stiff first.
And see how that goes. No place to go. Then we will drill 1/4 inch holes in
the rubber and run it up again. Surprisingly that block silicone
rubber can be machined.

Paul Lamar

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