From: Sky2high@aol.com
Message-ID: <66c63fe9.24ac59f5@aol.com>
Date: Thu, 1 Jul 1999 01:43:17 EDT
Subject: Nose Wheel Shimmy
To: lancair.list@olsusa.com
Mime-Version: 1.0

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I have a 320 with strut serial no. 30.  I had 2 service bulletins applied 
before it was ever used (Loctite on flange threads and a recommended service 
performed by Lancair). 

However, I whacked away the tow bar once (Lancair type, located on the 
nosewheel fork) with the path-clearing propeller blade.  A year later, on 
employing an experimental landing technique, I managed to slam the nose down 
hard enough to destroy the prop and deform the nosewheel fork.    For safety, 
I replaced the the fork, bearings and nosewheel assembly (and, for a small 
additional fee, the prop).

The tire has generally been inflated to about 30 psi and the wheel, when 
hand-spun off the ground, has been tightened to not allow more than 1/2 of a 
turn.

I have never had the slightest shimmy.

Recently, because of an internal leak, Lancair rebuilt my strut with the 
self-centering option and what appears to be a beefier actuator and flange.  
They stated that I should have had shimmy because my old dampener was 
approaching trash.

Since there is so much concern about the conditions leading to shimmy, could 
those people who have experienced shimmy please send the following to the LML 
so we could tabulate the info:

Lancair Type
Strut serial # (on the bottom of the flange or written in your log book)
Tire pressure
Tire condition (uneven wear or scalloping)
Abusive treatment (Rough taxiing conditions, sideways landings, etc
Any other pertninent info


Scott Krueger
N92EX

P.S.  I would love to hear Dan Schaefer's prop story since I am on blade 4 
and 5.
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