Mailing List flyrotary@lancaironline.net Message #26831
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: counterweights
Date: Tue, 4 Oct 2005 21:52:49 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Dave, a though occurred to me.  Since you do know the weight of the rotors for each compression and year (see Mazdatirx chart below), if  any one had the counter weights for a know year, I imagine there is a proportional ratio between rotor weight and counter weight.  In other words, the lightest rotors should take the lightest counter weights.  Heaviest rotors the heaviest counterweights.  In fact if you had two data points for two different compression rotors you could probably come close to figuring out the third counter weight weight.
 
Just a though.
 
Ed A
Engine Year Compression Weight (Grams) Weight (Pounds)
12A 76-82 9.4 4603 10.15
12A 83-85 9.4 4353 9.60
13B 74-78 9.2 5253 11.58
13B 84-85 9.4 5253 11.58
13B N/T 86-88 9.4 4553 10.04
13B Turbo 86-88 8.5 4553 10.04
13B N/T 89-92 9.7 4328 9.54
13B Turbo 89-92 9.0 4328 9.54
13B T/T 93-95 9.0 4328 9.54
 
 
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
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