Great Planes Learjet 40 Kit - GPMA0439 - Manual (Page 18)

D 10. Insert the die-cut 1/8" plywood aileron servo tray
supports into the opening on the top of the wing, then fit
the servo tray onto the supports. Glue the assembly to the
inside of the wing with thin CA followed by a fillet of thick
CA. If installing retracts, repeat this operation for the die-cut
1/8" ply retract servo tray.
D 11. Draw a center line on the die-cut 1/16" plywood
trailing edge reinforcing plate across the narrow
dimension. Glue the plate to the bottom of the wing, with
the centerlines on the wing and plate in alignment. Be sure
the punch marks are on the side that shows. You will need
to see them later.
D 1. Trim the four plastic tip tank halves to the embossed
cut lines.
NOTE: Each piece has one half of a lap joint.
D 2. Sand the edges smooth. Roughen the inside surface
of the wing tip recess with coarse sandpaper.
D D 3. Carefully cut out the plastic from the inside of the
slot in the middle of the rib recess.
D D 4. Insert a die-cut ply tip tank former into the notches
of the tank rib. Insert the die-cut tip tank tongue (tapered
end first) through the rib slot into the notch of the former.
Align all parts "straight and true," then securely glue
them together.
1. Use the die-cut plywood leading edge gauge to check
the curvature of the LE along its length. The wide end of
the gauge is used at the root and the narrow end is used at
the tip. If necessary, touch up the LE with a sanding block
to conform to the gauge.
D D 5. Insert the tip tank tongue through the slot in the
tank and test fit the assembly on the wing tip. Be sure to
match the right tank with the right wing tip and the left
tank with the left wing tip.
D D 6. Remove the wooden support assembly, then apply
6-minute epoxy to only the rib. Slide the tongue back into
position through the tank (while on the wing) and allow the
epoxy to cure. Do not get any epoxy onto the tongue as the
tank must be removable.
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