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Trim tab fabric allowance

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Duke851

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Jul 18, 2009
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I am getting ready to weld up the elevator trim tabs. I read on Captain Al's site that he recommends using .040" shims between the hinge and the ribs (.080" total with the shim front and back) to allow for fabric thickness so the trailing edge of the tab lines up with the elevator. I have no knowledge of how thick the covering actually is but this seems like a lot. Does anyone have any thoughts about this, is it even necessary? I'm not feeling it and it has me stalled.

Colin
 

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