Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 13)

gear detail drawing on the wing plan for proper position-
ing). File the notches if necessary for a good fit. Now use
epoxy to securely glue the block in place.
27. Epoxy the 7/16" x 5/8" x 7/8" hardwood
block to the LG block and to the 1/16" ply doubler on rib
W-2. as shown on the plan and in the photo, then epoxy
the small hardwood block to the other end of the LG
block and to the 1/16" ply doubler on rib W-4.
Photo of finished wing with retract mechanism removed.
the bottom of the wing, in the location shown on the
plan. Lock and strengthen the joints between the
1/4" ply rails and the 1/16" ply rib doublers by
gluing 1/4" balsa triangle stock to these joints. You
should also now do some planning and trial fitting of
the retract and pushrod, customizing the installation
as necessary to accommodate your retracts.
Installing retracts requires careful planning and
a lot of trial fitting; therefore, you should take the
time now to plan out your installation.
31. With the wing upside down, again use the
TE jig to support the TE. Then install the bottom TE
sheeting, LE sheeting and Center Section sheeting, cut-
ting and fitting the sheeting around the LG block as
necessary. IMPORTANT NOTE: To insure a
straight wing, you must pin or weight the TE securely
down on the TEjig while the bottom sheeting is glued
in place!
28. Drill a 5/32" hole down through the grooved
LG block and the 7/8" block. Line up the drill so you are
drilling straight down through the middle of the 7/8"
block.
29. Trial fit the 5/32" diameter main landing
gear wire into the landing gear block at this time. Cut or
file the groove and hole in the landing gear block as
necessary for a good fit.
30. Using a razor saw, carefully cut off and sand
all excess sheeting, spars, LE and TE even with W-1 and
W-ll.
NOTE: If you will be installing retracts, now is
the time to glue in the 1/16" ply die-cut rib doublers
to the front portion of ribs W-3 and W-4. (Make
sure the front rib doublers are on the outboard side
of W-3 and the inboard side of W-4). This is also the
time to install the 1/4" ply retract mounting rails on
13
32. From the 3/32" x 1/4" x 30" balsa sticks, cut
and glue cap strips to all exposed ribs, top and bottom.
HINT: Foreasierpositioning of the cap strips, firstmark
the location of each rib on the LE and TE sheeting.
33. Trim the sheeting flush with ribs W-l and
W-11 and sand the entire wing panel smooth. Sand the
leading edge to smoothly blend with the LE sheeting (see