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Date: Thu, 06 Dec 2007 11:11:04 -0700
From: Dale Rogers <dale.r@cox.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] electric constant speed
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I attended one of their tech presentations at this year's Copperstate 
Fly-In.  The engineering is rather impressive.  Compared to the Ivo, the 
Vari blades look to be much more stable.  Of course, it ought to be, for 
$7500 (2 blade).

[ http://www.variprop.com/ ]

Dale R.
COZY MkIV #0497
Ch. 12; Ch's 13, 16, 19 & 24 in-progress

kevin lane wrote:
> has anyone heard anything about Vari-Prop?  http://www.variprop.com   
> I spoke with Larry Morgan the other day after a stop at van's.  he is 
> a retired engineer and has been working on this project for 20 years, 
> sinking over a million dollars into development (hey Tracy, sound 
> familiar?...how to turn a big fortune into a small one....:-)  he 
> showed me the ellipse blade for the RV which he hopes to fly in the 
> next month.  the prop tip must have a chord length of perhaps 3/4" !  
> the wood blade is very stout, maybe 4" chord midway and 2" thick(from 
> memory).  I was thinking I could install one on my O-320 and later use 
> it on my renesis.  he offers 2,3,4 blade combos, tho most are buying 
> the 3 and 4 bladed models for their high-perf planes. his system is 
> all electric with a small stepper motor driving a remote hydraulic 
> master piston that produces pressure for a piston in the hub. feedback 
> of rpm lets it keep a constant speed.  hub and blades weigh about 
> 58lbs, pump maybe 3?