SIG CAP 231EX, Assembly Manual, Page: 4 / 26

The flight surface can now be hinged in place. Begin by using a
scrap wood stick to apply a coat of petroleum jelly, such as
Vaseline®, to both sides of the hinge knuckle, as well as each end
of the knuckle. Do not get this material on the hinge ends to be
glued! Petroleum jelly keeps epoxy from sticking to the hinge
joints. Hinges should be installed, starting with the flying surface
side first. We also suggest using slow cure 30-minute type epoxy
for hinging because of the longer working time and strength. Apply
epoxy glue to one side of the hinge, liberally coating each side and
filling the "double X" cutouts. Insert the hinge into its slot, along
with the sharp end of the pin.
Slide the hinge in place into
the previously cut recess. The free, unglued side of the hinge half
should be even with the front, beveled edge of the flying surface
when flexed 90°.
Use a clean cloth and alcohol to carefully
remove any excess glue and move to the next hinge. Once the
hinges are in place in the flying surface, apply epoxy to each side
of the remaining hinge halves and insert them into the
corresponding slots in the wing, stab or fin. You want the beveled
leading edge of the flying surface to be as close to the mating part
as possible while still having full left and right or up and down
movement ability.
Again use alcohol and a cloth to carefully
remove all excess glue. Flex the flying surface to be sure it moves
freely. Tape the part in place and move to the next surface to be
hinged.
WING ASSEMBLY
The wing panels have been carefully built, sanded and covered at
the factory. The dihedral angle has been already built into the root
ribs of these two panels and should require no further adjustment.
However, before assembly, install the plywood laminate wing
joiner into one of the panels and slip the opposite panel in place.
Check the fit for alignment and that both root ribs come into firm,
straight contact with each other. If the wing joiner requires a little
trimming to achieve this fit, do so now. These instructions assume
a good fit.
❑
1) Prepare the two wing panels for assembly by first using
your hobby knife to remove the covering from the forward
wing dowel mounting holes, the top round holes for the
servo cable exits and the rear wing bolt mounting holes.
❑
2) From the kit contents, locate the two (2) pre-covered aileron
hatch covers and eight (8) #2 x 3/8" screws. Trial fit the
hatch covers into the aileron servo openings to determine
which cover goes in the right wing and which goes in the left
wing. Position and tape the hatch covers in place, aligning
their servo arm cutouts with the ones in the wing opening.
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