Jim,

As I recall....and I am going from memory here only.  ....  When bonding the
lower wing skin on, the plane is inverted.  Bonding the aft spar web
subsequent to bonding the lower wing skin on, should also be done with the
plane inverted.  After the aft spar web bond is done and after righting the
plane, the wings are put back on, and the flap hinge points are built up.  I
believe the manual instructs to use a straight edge when making the actual
bond.  All three flap hinge points should be layed-up at the same time and
the straight edge with release tape should be clamped onto the hinge points
to insure that the hinge points are in a straight line.

You'll naturally end up with some of the skin where there are no hinge
points being wavey, but that is mostly because they will still be too long
on the aft dimension at that point and when trimmed will true up nicely.  If
you didn't follow this procedure, then you most likely do not have true hing
alignment.  I believe that you can fix that by rebuilding the hinge points
and using a straight edge.  And if you didn't do it the first time with the
outer wings attached, you should do it the next time with them on.

I hope this helps.

Regards,
Curtis Krouse "No longer a proud owner of a Lancair".


Ladies and gentlemen … gurus all.

I’m to the point of skinning the left wing on my 360. Thought I’d take a
look at how good the flap hinge line was going to be. So I weighted the skin
down to match the elevation of the stub wing as it should be. With the wing
mounted, I strung string from the flap inside forward-most point (on the
stub wing root) to the distal-most forward flap location on the bottom skin
of the wing. This of course forms the forward hinge line of the flap. The
string, straight and true, does not follow the trailing edge of the stub
wing
and wing. There’s a reflex point at the stub wing/wing joint. That
means the trailing edge is not straight in the “z” (up/down) dimension or
alternately stated, it ain't flat. What can I do about it to make the flap
hinge work, as it should? I have pictures if it will help with
visualization.

jim