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Reply-To: "kevin lane" <n3773@comcast.net>
From: "kevin lane" <n3773@comcast.net>
To: "flyrotary" <flyrotary@lancaironline.net>
References: <474F6B3D.9090702@bellsouth.net>
Subject: electric constant speed
Date: Thu, 6 Dec 2007 09:08:57 -0800
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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?    kevin