From: AVIDWIZ@aol.com
Message-ID: <103.9763663.28dd7917@aol.com>
Date: Sat, 22 Sep 2001 01:18:15 EDT
Subject: Re: Partial Landing Gear Retracting
To: lancair.list@olsusa.com
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Reply-To: lancair.list@olsusa.com

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I had the same problem on my IVP.   The answer lied in the teflon runner 
attached to the gear door on which the gear travel during retraction thereby 
forcing open the door.

These runners are specified per the factory to be 1/8" in diameter but in 
practice a 1/4" piece is far more robust.   You mention that on the ground 
retraction tests showed no problem.   The answer to this problem lies in the 
fact that during flight the air load on the gear doors when retraction takes 
place at 140 KIAS is demanding on the teflon runners and they tend to warp 
over time.  I would expect that if you inspect these runners you will find a 
1/4" indentation or more in the runner about 3 in from the front which is 
caused by the initial impact of the gear when retraction starts.  This causes 
a hang up in the retraction process which winds up placing your gear in the 
30% down position.

In my case what I did was remove the factory supplied runners and replace 
then with 1/4" which solved the problem.

Good luck and I agree with you the IVP flies like a sofa bed with its gear 
down!!!

Dave Riggs
Beverly Hills
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