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John,
I'm sending you an article we published in the LOBO Newsletter about this three years ago. Notes and changes are courtesy of Chris Zavatson--thanks Chris! Short answer is that if your nose wheel will turn more than 60 degrees left or right (45 degrees for an original, unmodified strut), the shimmy damper in the strut has been damaged and is inop/ineffective. See the attached article for details.
Bob
-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John Cooper
Sent: Monday, May 05, 2014 10:27 AM
To: Lancair Mailing List
Subject: [LML] Oleo Strut Over-Rotation
We know that Esco limits the rotation of the oleo strut to +/- 25º, but what happens when that limit is exceeded? How would one know that it had been exceeded? I noticed yesterday when turning my L-235 around at the end of the runway that I could almost do a U-turn; certainly my nose wheel was angled at more than 25º during the turn. I'm wondering if internal oleo-strut damage due to over-rotation could be the source of the problem I'm having with directional control while fast-taxiing. Anybody?
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