The rib set for this wing is identical to what
would be used for a D-Tube wing. If you are building a D-tube then the
process is actually more tedious, but less stressful. Be sure the wing is pinned securely to the
board. If the wing
warps now the warp will be very difficult to remove.
Trim one edge of the leading edge sheeting so
that it is straight. Lay a piece of masking tape down the main spar
covering the rear half of the spar. Spread slow-drying glue along the
exposed part of the spar, the forward portion of every rib and the
Carefully align the
straight edge of the sheeting on the spar and pin it securely in place. If the sheeting you
are using is particularly stiff then you may want to run a wet sponge over
it to allow it to bend more easily. This is hardly ever necessary
Do not pin the sheeting to the
sub-leading edge at this point. Chances are the sheeting will not be
making full contact with the ribs. Instead, use your hands to push the
sheeting against the ribs starting from the spar and working your way
forward. Criss-cross pins through the sheeting midway between the spar
and the sub-leading edge. Start at the center rib and work your way
When all the ribs are pinned,
push the sheeting against the sub-leading edge. Push pins through the
overhanging sheeting into the front of the sub-leading edge. That
should do it. Look from the end of the wing underneath the sheeting
and make sure it is contact with the ribs. If it is not then more pins
may be necessary.
At this point you
should remove the masking tape and wipe up any excess glue from the back
edge of the leading edge sheeting.
If the trailing edge
sheeting does not sit on a spar, then make a mark on the ribs at each end of
the panel that represents the width of the sheeting. Lay a
straightedge across these marks and then mark the rest of the ribs.
Add glue to the ribs and the trailing edge if it is already in place.
Pin the trailing edge sheeting in place.
Now cut and fit all the
cap strips. I like
to cut them ever so slightly over length and jam them between the trailing
edge sheeting and the leading edge sheeting. Usually I can get away
with one pin holding the cap strip down in the middle. At most you
should need three pins for each cap strip — one at each end and one in