From: IKOR1@aol.com
Message-ID: <fc6afc1b.2505343c@aol.com>
Date: Mon, 6 Sep 1999 11:14:04 EDT
Subject: Lancair IV Aileron Trim Tab
To: lancair.list@olsusa.com
Mime-Version: 1.0

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    Like several others I found that the aileron trim tab that was made of 
hinge and extended beyond the normal trailing edge to be incompatible with 
the rest of the lines on my IV.  We recently addressed this problem by 
mounting the mac 9 servo through the aileron spar, the body of the servo lies 
half way ahead of the spar and is secured by a bracket.  It is still 
accessible through the same access panel.  The horn for the tab is just 
slightly higher than the bottom of the skin, and the coupler to the crank as 
it arcs over the hinge line needed a lot of room carved out of the aileron 
skin.  We will cover both with a little cosmetic cover.  We sized ours to 1.5 
by 7 inches, so the size recommended by Brent Reagan is now accepted as the 
correct one; I recall talking to Brent a long time ago and that may be how 
the size was finally determined.  Brent's information has served me very well 
over the years.
    It seems that we also made some changes in the aileron ribs to 
accommodate the change in the placement of the servo in the spar to carry the 
loads to the skin.
    Yes, it can be done, I can put some of the pictures on the web site 
Rainbowaviation.com if anyone is interested.  Final caveat:  We are still 
building, not flying, so the tale of what we chose to do is untested.

Ross  Walters Turbine Lancair IV
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