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Mario: My next thought on your wing trailing
edge droop is that you have an accumulation of material (probably dripped epoxy)
on either the leading edge of your wing spar or else on the trailing edge of the
stub wing spar. This would prevent those two pieces from aligning
properly by laying flat against each other when they are bolted
together.
I had this problem when constructing and it took me
a full week to find and correct it.
Also, I have previously seen this problem discussed
in this LML forum. I believe the suggested solution was that alignment
could be achieved with the application of micro slurry to the aft stub wing spar
and a release agent such as plastic sheeting being applied to the opposite face
so that adhesion could not occur between the two surfaces.
Then, without letting the epoxy harden, by attaching the aft spar snugly
first, before bolting the wing spars to each other snugly, the alignment can be
accurately made with no gap at all between the two surfaces. The trick is
to not let the epoxy harden on you before bolting everything snugly; quite
difficult in the summer heat--and costing you an immense loss of time to clean
up and start over if the epoxy prematurely
hardens. Greg Nelson
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