Message-ID: <3C470CCA.2070206@regandesigns.com>
Date: Thu, 17 Jan 2002 09:41:30 -0800
From: Brent Regan <Brent@regandesigns.com>
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To: Lancair List <lancair.list@olsusa.com>
Subject: RE: 4P Nose Wheel
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>>
Alec is considering canting the nose gear 5 degrees forward in order to 
increase the resistance to unintended retraction. I don't think this 
will accomplish the desired results and may have unintended negative 
consequences.

Assuming a nose wheel load of 400#s (I seem to recall having to put 200 
pounds of lead on the engine mount when the 600# engine was removed) and 
a nose gear angle of 5 degrees then the forward component would be 400 
tan5 or 35 pounds, AKA "not much".

The bad news is that the nose wheel has about 1.8" of caster. As soon as 
you incline the nose gear axis off of vertical (forward) the nose gear 
wants to spin 180 degrees. The resulting torque is in opposition to the 
castering torque and may lead to, or exasperate,  nose gear shimmy.

I am unaware or any nose gear failure that would have been prevented by 
raking the nose gear off of vertical.

Regards
Brent Regan

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