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Reply-To: "kathy" <kathy@atkinsrotary.com>
From: "kathy" <kathy@atkinsrotary.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Single Rotor
Date: Wed, 15 Dec 2004 15:15:14 +0000
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Rb is a good referance. We weigh each rotor as it can be off by a couple of oz. When building the engine a couple of oz can make a big differance.

FYI we have 2 single rotor shafts available depending on the stress loads. I could get more detailed information if you like. 
Kathy

-------Original Message-------
> 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
>  
>  >>  Homepage:  http://www.flyrotary.com/[2]
>  >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html[3]
-------Original Message-------