Top Flite TOPA0140 - Manual (Page 21)

Perform step 29 only if you are building flaps.
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29. Make the flap center pushrod from two 6"
[152mm] rods that are threaded on one end, two
threaded couplers, two nylon clevises and a
dual-ended ball link. Cut the pushrods to the
correct length shown on the plan and silver solder
the threaded couplers to them. Wipe the pushrods
with oil so the flux used with your silver solder will
not cause them to rust.
JOIN THE OUTER PANELS TO THE
CENTER SECTION
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1. Test fit the left wing panel to the center
section. If necessary, trim the landing gear rail
notches (if you are installing retracts) and the spar
notches in the root rib of the left wing panel so
both panels align.
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2. Test fit the right wing panel to the center
section the same way.
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3. Assemble the die-cut 1/8" [3.2mm] plywood
upside down TE jigs and locate the die-cut 1/8"
[3.2mm] plywood upside down tip jigs and the
upside down LE jig.
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4. If you’re building flaps, slide the flap center
pushrod into the center section and temporarily
connect it to the flap servo just to keep it in place.
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5. Make sure your landing gear rails are in
place but not yet glued in both wing panels (if
you’re installing retracts). Temporarily join both
outer panels to the center section and place the
wing on the jigs upside down on your workbench
with the tip jigs under rib 13 at each tip. Place
weights over the center section and the wing tips.
Make sure the panels and the center section rest
on the jigs. Position the landing gear rails in the
notches of the ribs as shown on the plan (if you’re
installing retracts). Carefully view all joining parts
and make adjustments where necessary.
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6. Gather your clamps and cut some paper
towels into 2" [50mm] squares to wipe away
excess epoxy as you proceed. Separate the wing
panels. Mix up a batch of 30-minute epoxy and
apply to all joining surfaces. Proceed immediately
to the next step.
Note: If you feel your 30-minute epoxy will not
provide enough working time for you to join both
wing panels, you may join one at a time.
❏
7. Join the wing panels to the center section as
described in step 5 and place it on the jigs (retract
installers – your landing gear rails are in position,
right?). Position your clamps, wipe away excess
epoxy and do not disturb the wing until the epoxy
has fully cured.
❏
8. If you have not done so already, join the other
panel to the center section in the same manner.
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