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Re: Wing alignment

Subject: Re: Wing alignment
From: david joyce <davidjoyce@beeb.net>
Date: Tue, 17 Dec 2002 11:55:59
Bill, I think the question of wing sweep is misleading. IMHO there is only
one place to fit the wings and that is with the spars tight up against each
other and tha rear of the cockpit module. Any gap between spars or module
seems to be putting an unreasonable load on the spar pins inviting failure.
If you fiddle around with the wing tips getting the sweep measurements
precisely equal you can easily end up with a half inch gap between seatback
and spar, which is what happened to me on my first attempt. Having cut off
the pin sockets and thought about it I then fitted them with blocks pushing
the spars forward onto the cockpit module. This resulted in a 1cm
discrepancy in the wingtip to tail measurements on the two wings, which I
think is of no consequence, and much preferable to a gap between spar and
module. Happy Xmas, David Joyce
----- Original Message -----
From: Wil McClellan <wilmac@gte.net>
Subject:  Wing alignment


> In setting up the wings for correct angle of incidence (2.5 deg +or - .05)
> is simple enough to accomplish but I have a potential problem with the
> forward and aft sweep.  Holding the fuselage in place I can put adequate
> pressure to get the wing sweep corrected but I question that even with the
> pin sockets properly set including the rear pin tie bar inplace, the wings
> won't still return to at least some of the incorrect sweep.  Both my wings
> are about equal in rearward sweep.  This will put the tie bar in
> compression. I estimate I have to put 6-7 pounds of forward pressure on
the
> wing tips to get the correct position.   Maybe this ultimately will be
> corrected out with the tie bar but has anyone found they had to do extra
> correction for this problem.
>
> Thanks,
> Bill McClellan
> A164
>
>



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