Mailing List lml@lancaironline.net Message #65849
From: Brent Regan <brent@regandesigns.com>
Subject: Re: Nose gear check 4P
Date: Wed, 12 Jun 2013 08:36:56 -0700
To: Lancair Mailing List <lml@lancaironline.net>
Ralf writes:
"A friend took a picture of the belly of my airplane in flight with the
gear up. It looked to me that the nose gear door was not completely
closed."

The original factory nose gear door linkage geometry provided too low a mechanical advantage to keep the doors closed against the internal cowling air pressure during flight. On the door bracket, you need to fabricate a new part with the link ball hole rotated about the hinge centerline towards the AC center. This will give a larger effective moment arm when the doors are closed. A slight kink in the linkage arms is required. See pictures attached.

BTW, Selecting Gear Up while on the wheels is an incredibly bad idea. Buy a decent pair of jacks NOW. Also, do NOT strap the spinner to lift the nose. Remove the top cowl and strap the propshaft.

Regards
Bren Regan
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