Great Planes Ultra Sport 60 Kit - GPMA0420 Pages 1-27 - Manual (Page 12)

NOTE: If you are installing retracts, disregard steps 26
through 29.
26. Remove the wing from the building board and
trial fit the long grooved hardwood LG block into the notches
in ribs W-2, W-3 and W-4 (see the landing gear detail drawing
on the wing plan for proper positioning). 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
Photo of finished wing with retract mechanism removed.
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" x 13/16" x 2-11/16" ply
retract mounting rails on 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.
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.
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, cutting 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 TE jig while the bottom
sheeting is glued in place!
block and the 7/8" block. Line up the drill so you are drilling
straight down through the middle of the 7/8" block.
28. Drill a 5/32" hole down through the grooved LG
29. Trial fit the 5/32" diameter main landing gear 32. From the 3/32" x 3/8" x 30" balsa sticks, cut and
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 glue cap strips to all exposed ribs, top and bottom. HINT:
For easier positioning of the cap strips, first mark the location
of each rib on the LE and TE sheeting.
30. Using a razor saw and a sanding block, carefully
cut off and sand all excess sheeting, spars, LE and TE even
with W-l and W-ll.
33. Trim the sheeting flush with ribs W-l and W-ll
and sand the entire wing panel smooth. Sand the leading edge
to smoothly blend with the LE sheeting (see the note on the
following page).
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