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1. Cut the tapered and grooved balsa center trailing
edges to the length shown on the plan. Bevel them so they
join as shown on the plan. Test fit the center TE’s on the
wing. Note: The center TE is positioned on the wing with
the 90 degree edge at the bottom of the wing.
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2. Place the center TE’s over the wing plan and mark the
location of the aileron torque rods. To clear the torque rods,
cut notches at the marks on the bottom of the center TE’s. Test
fit the torque rods in the center TE’s to check for clearance.
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3. Turn the wing upside-down and position the center TE’s
on the wing TE with the torque rods installed. Mark the
location of the notches on the bottom of the wing’s TE. Cut
notches in the wing TE at the marks. Test fit the center TE’s
with the torque rods installed, checking that the notches align
and are large enough to allow the torque rods to move freely.
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4. Use coarse sandpaper to scuff the nylon tube bearing
on the aileron torque rods so that the glue will adhere better.
❏
5. To prevent gluing the torque rod to the nylon tube
bearing, apply petroleum jelly on the torque rod at the ends
of the nylon tube bearing.
❏
6. Use 30-minute epoxy to glue the nylon tube bearings in
the center TE’s and the center TE’s to the TE of the wing.
Tape the center TE’s to the wing so that the bottom of the
center TE’s are aligned with the bottom of the wing. Use a
paper towel dampened with rubbing alcohol to wipe off any
excess epoxy before it cures.
Build the Ailerons
16
