Hi 3top,
You can try a search on ~ Posting by Frank Robinson on www,pprune.org ~ Nov. 29, 2000.
~ or ~
A copy of it can be found by going to web page
http://www.UniCopter.com/B185.html#Robinson and then scrolling down until you see;
R22 ROTOR SYSTEM ~ Posting by Frank Robinson on www,pprune.org ~ Nov. 29, 2000.
Dave J.