Paul

I have a good friend who is a CalTech engineer who wants to make a 25 pound
redrive
for the rotarys. He's willing to do the  FEA study to optimize the design. I
have looked at what Dave Algae has done with his redrive using Carbon
prepreg
and an autoclave. Can you express your thoughts on a carbon redrive and can
that
be a viable solution to Tracy's 45 lbs monster?

Tony

I have seen that before. The big question is how is it going to handle
250 F temperatures? If it is not a planetary I doubt the spur gears
will hold up for 2000 hours or more. Racing cars that use that type
of transmission only have to last a few hours. I'll start to believe
it when it starts to win some 24 hour races.

Paul Lamar

Use polyimide resin and it will take 250F indefinitely.

Steve Brazil

I still think it is too technically risky for aircraft use.
We can get 10 to 15 pounds out of Tracy's unit using old
tried and true aluminum housings. A lot of the current weight
is in the poor choice of bearings and prop shaft.

The Ross proved that.

Paul Lamar