From: "Fred Osborn" <fosborn@infowest.com>
Subject: [FlyRotary] Single Rotor
Sent: 15 Dec 2004 14:38:48

 In a message dated 12/15/2004 Fred Osborn wrote:
 
 >  rotors in
 
 > In a subsequent message dated 12/15/2004 07:40 EST Lehanover@aol.com[1]
 > wrote:
 
 > < I thought that weight would have to be added in order to balance a 9
 > pound
 > < rotor. Is that not the case.
 
 According to the RB rotor weight charts my 87 NA rotors weigh 10.04#. I
 had to
 add approx. 4oz. to each balance weight to get to a crude assembly
 balance on
 a pair of parallel level round bars. The 89 NA rotor weighs 9.54#. Thus
 the hope
 that 8oz. lower rotor weight will bring me close to a static balance
 condition.
 Then I will have to go through a rather complex measure procedure to get
 close
 to a dynamic balance. As far as I have been able to determine no one is
 setup to
 do a spinning dynamic balance on a single rotor.
 
 >  cooling oil
 >  crank. Does
 >  < Using the front stationary gear sounds to me to be the way to go.
 > With the
 > < large direct oil drainback at the bottom of the stationary gear.
 
 Yes, you need the front stationary gear to position all of the front needle
 bearing stuff anyway and it's much lighter than the rear gear.
 
 Lynn, it sounds like you are seriously considering a single rotor
 engine. Did I miss
 something in a previous post? What would you plan to do for an e-shaft?
 I cut up
 a 13B part, did some crude machining, and shrink fit the cut down front
 part into
 a pocket in the rear rotor journal. Definitely not a flight article but
 it turns smooth
 in a single rotor buildup so I can try doing some other things I'm
 interested in trying.
 
 Please all, forgive my crude editing, I'm just beginning to attempt to
 learn to post
 to this forum.
 
 Fred Osborn
 
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