When I was at Shady Bend prior to S&F the subject of PSRU oil seals
came up. Tracy is using full flow engine oil pressure in his gear box
to feed the plain bearings with no seal problems. No restricter of
any kind. 

Tracy hollows out the housing below the ring gear slightly to act as a 
scavenge pump. It is working very well indeed.

When Chuck tried that he did not get the drain in the middle of the 
ring gear and perhaps that is why it did not work for him. 

IMHO a Teflon block scrapper just ahead of the drain hole would work 
even better.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org