Mailing List lml@lancaironline.net Message #42159
From: Robert Pastusek <rpastusek@htii.com>
Sender: <marv@lancaironline.net>
Subject: RE: [LML] Re: IV-P pitch trim limiter
Date: Wed, 16 May 2007 18:48:14 -0400
To: <lml@lancaironline.net>

Colyn Case wrote:

I'm considering limiting the travel on the elevator trim tab.

Has anyone else thought about or done this?


Colyn, the trim limits are normally set by the designer and verified during test to provide “hands off” flight in all normal operating modes and configurations. For the elevator/pitch trim, the most taxing is usually the takeoff and landing configuration/operating speeds. A lot of home-builts don’t fully achieve this, especially in the flare to touchdown, but you might consider maintaining at least enough trim authority to achieve a neutral stick force during normal approach, even if you need to add a bit of back pressure for touchdown. Just a thought.
Bob Pastusek
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