I found another approach to reducing planetary gear chatter, although
this is not a commercial product yet.  It could probably be fabricated by
a good machinist?[heck, George is looking at making his own engine
housings!!]  It has to do with having the planet gears do double duty as
roller bearings, eliminating the need for such bearings.  Also, the number
of gear teeth differ from one end of the planets to the other, reducing the
sympathetic harmonics of each gear

http://www.memagazine.org/backissues/membersonly/aug02/features/
startnew/startnew.html

Gene Kahn

I am having a bit of trouble understanding how this works.

I think I would have to hold it in my hands and fool with it.
I guess we will see when it hits the market.

Paul Lamar

Paul,

The Center "Roller Disk" and the "Crown Roller Ring" holds the "Planets
gear with Roller" in place. Eliminating the Bearings. The large roller
should also take on larger load and have less turns than a roller
inside a bearing. Eliminating the bearing means there is nothing to
seize.

Henry Nee