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    If the rear spar of the HStab on the ES is not exactly vertical, then
the geometry of getting the hinge line correct becomes even more
complicated, as noted in Skip Slater's posting.  It isn't the position of
the hinge bases that matter, but rather the actual hinge bearing centerline.
If the spar tilts forward, then the hinge base has to be lower on the spar
in order for the bearing center to be where it's supposed to be.  Add that
to the asymmetrical shape of most of them, and you've got a real geometry
head-scratcher.  There's no perfect solution.

    On the aileron thing, the TE of the fast-build wing in the outboard area
where the ailerons mount is not as thick as the aileron.  The best thing to
do here is to fit the bottom skin (on top, actually, in the jigs) with the
upper cradles fastened down, then add some small wood pegs or shims to the
outboard three ribs until the TE of the wing skin matches up with the
aileron profile.  Then put release tape on the wing skin and do a flox
release on those three ribs and the aft spar web, tapered from the main spar
aft to the shims or pegs.  The aileron hinge blocks should not be put in
until after this is done; otherwise you'll have aileron hinges off center,
and the same variable gap problem as on the elevators.  And, by the way,
you'll probably have to chew out some of the core forward of the TE of the
lower wing skin in order to have room for the aileron counterweights.

Jim Cameron
N143ES reserved


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