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ACRO E-mail Archive Thread: [Acro] Re: Aileron upgrade on S1S

Thread: [Acro] Re: Aileron upgrade on S1S

Message: [Acro] Re: Aileron upgrade on S1S

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From: Klusmanp at aol.com

Date: Fri, 24 Oct 2003 05:47:22 UTC

Message:

Gus,

Probably the simplest mod for increasing roll rate would be gap seals. I 
think most Christen Eagle II's have them. It is a flexible clear plastic sheet 
that attaches to the front of the aileron and rear spar on the wing. The purpose 
is to keep air from "spilling" through the gap between the wing and aileron. 
The plastic material is similar to a heavy duty food storage freezer zip-lok 
bag.

I'm not sure the best way to attach the material - probably some wicked 
double sided tape. Let me know if you try it - I've got an S-1S as well.

Oh yes, I do know of one more mod: fences. These are triangle-shaped pieces 
of sheet metal that attach to the wing at the inboard and outboard end of the 
aileron "cutout" to seal the ends of the aileron. lets say the chord length of 
the aileron is about 10 inches. Your triangle would be about 10 inches long 
and the width of the triangle is the same distance as the total up and down 
travel of your aileron trailing edge. This triangle is mounted to the wing in the 
small gap between the end of the aileron and the wing (you would actually have 
two of them - one on the inbd side and one on the outbd side).  I saw this 
mod on an S-1S in Greely, CO area. The airplane was for sale at the time so it 
may have a new owner now. I believe somebody in the Boulder area was looking at 
this plane to purchase.

Paul Klusman
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