Top Flite TOPA0305 Part 1 - Manual (Page 27)

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12. Drill holes in the rails and mount your
landing gear. Use the screws included with your
landing gear. Hint: Countersink the holes in the
landing gear for #6 x 1/2" flat head screws.
13. Now is a convenient time to plan your
air line routing. If you haven't already done so,
drill or cut holes in the ribs to guide the air lines.
A 5/32" brass tube sharpened at one end makes
a great drillto cut holes through the ribs.
Perform steps 14-16 if you are installing fixed
landing gear.
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14. Use 30-minute epoxy to glue the 1/2" x
314" x 6-3/4" grooved hardwood landing gear rail
in the notches of the ribs and rib doublers with the
groove visible, as shown in the photo. At the same
time, glue the 3/4" x 3/4" x 1
"
maple torque block
to rib doubler W4G and the top of the landing gear
rail. The fixed landing gear rail and rib doublers
are shown on the left wing plan.
15. Cut the 1 / 4 x 1/2" x 9" plywood flap
servo hatch forward rail to a length of 3-1/16".
Glue it into the notches of ribs W6 and W7.
16. After the epoxy on the landing gear has
fully cured, drill a 31/6" hole through the landing
gear rail and the torque block. The center of the
hole should be 3/32" from the plywood rib doubler
W4G. Make sure you hold the drill perpendicular
to the bottom of the landing gear rail.
17. Optional: From the right side of the plan cut
off the two paper tube strips along the dashed lines.
Roll these strips and cut them to the lengths needed.
They are used to allow easy routing of the servo wires
and their extensions. For fixed gear the tubes go from
R2 to R9. For retracts they go from R7 to R9. For
retract installation, the wires can easily be fished
through the small holes in R4, R5 and R6.
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18. Cut three 3-1/16" long servo hatch cover
rails from the 1/4" x 3/8" x 24" basswood stick (the
same stick you used for the landing gear rail
support if you are building retracts). Glue the rails
in the notches of the ribs where shown on the plan.
U 19. Cut three 1-1/2" long flap hinge blocks
from the shaped 5/8" x 9" balsa stock. Bevel the
ends of the hinge blocks
so they fit the ribs, then
glue them in the location shown on the plan. See
the cross section on the wing plan to be sure you
know the position of the blocks.
20. Cut five 1" long aileron hinge blocks
from a 1/2" x 1/2" x 6" balsa stick. Cut one 2-7/8"
long hinge block from the 5/8" x 1/2" x 6" balsa
stick. The long hinge block is the one closest to the
root end of the aileron and is the base for the
aileron control horn.
21. Bevel the ends of all the aileron hinge
blocks so they fit against the ribs as shown on the
plan. Bevel the tops of the hinge blocks that fit in
the aileron so they match the angle of the ribs.
Glue the hinge blocks in the wing and aileron.