Great Planes PT-40 MkII Kit - GPMA0118 - Manual (Page 38)

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17. Cut a groove starting from the hole you drilled to
the inboard edge of the aileron. Hint: Use a hobby knife to
sharpen the inside of one end of a 1/8" diameter brass
tube, then use the tube to cut the groove.
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18. Test fit the ailerons to the wing and the torque
rods. Make adjustments to the depth of the holes or the
grooves you cut so the aileron fits against the trailing edge
of the wing. Make sure there is about 1/16" of clearance
between the ends of the aileron and the wing center TE’s
and tip TE’s.
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19. Fit the right aileron to the wing in the same manner.
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20. Reference the wing plan and mark the hinge
locations on the ailerons and the trailing edge of the wing.
Mark the center lines of the hinge slots on the trailing edge
of the wing.
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21. Cut the hinge slots in the ailerons and the wing TE.
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22. Refer to the wing cross section on the plan for the
desired “V” angle on the ailerons and mark the “bevel to”
lines on the top and bottom of the ailerons. Use your razor
plane or bar sander to shape the forward edges of the
ailerons to a “V.”
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23. Test fit the ailerons to the wing and torque rods using
hinges. Make adjustments to the hinge slots if needed. For
future reference, mark each aileron as “R” and “L” in an
inconspicuous location (i.e., on the bottom or an end).
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24. If you are building the PT-40, glue each 1/32"
plywood wing protector to the top of the wing 1" from the
center. If you are building the PT-20, the wing protectors
should each be 7/8" from the center. Align the aft edge of
the wing protector with the aft edge of the wing center TE.
38
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1. Use a 1/4" drill to angle the hole in F-2 downward
to match the angle of the wing dowel. Test fit the wing in
the wing saddle. It should sit about 1/16" – 3/32" above
the wing saddle to account for the wing seating tape
which will be applied after you cover the fuselage.
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2. Align the wing with the fuselage by using a string or
a tape measure to equalize the distance from each wing
tip to the TE of the fin (or the end of the fuselage if you
have not glued the fin in place yet). Once aligned, lightly
draw matching reference marks on the center TE and
the fuse top.
SKIP STEP #24 IF YOU ARE BUILDING
THE BOLT-ON WING VERSION