Great Planes PT-40 MkII Kit - GPMA0118 - Manual (Page 35)

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26. Make two pieces from the last 2-5/8" strip to fill in the
space between the main spar and the forward bottom
sheeting at each tip. Glue the pieces in position.
You should
be pretty good at wing sheeting by now.
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1. Cut through the thin portion of the bottom aft center
rib 1C and remove the piece.
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2. Remove the two die-cut 1/8" plywood servo tray
supports and the 1/8" plywood aileron servo tray from the
die sheet. Don’t mistake the rectangular cutouts from the
middle of the servo tray for scrap because they are the
servo tray doublers for the servo screws. Put the doublers
back in your kit box for safekeeping.
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3. Insert the die-cut servo tray supports into 1C, then
test fit the servo tray to the supports. Adjust the notch in 1C
if required until the supports fit into the notches of the servo
tray. Set these pieces aside for now.
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4. Make a left and a right bottom center section sheet
by gluing two pairs of previously cut sheets together along
one edge. Trim and test fit each sheet to the bottom of the
wing
(you know the routine) but do not glue them in
position yet.
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5. Position one of the sheets on the wing and mark
the location of the servo tray supports. Remove the sheet
and cut a section out of it to clear the supports. Repeat the
process for the other sheet.
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6. Test fit the sheets with the servo tray supports and the
servo tray. After you have confirmed that all the pieces fit,
remove the servo tray and supports and glue only the
sheets to the wing center section.
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7. Use the last sheet you cut to cover the center section
in front of the main spar.
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8. Before you proceed, use your bar sander and 150-grit
sandpaper to “rough-sand” the structure. This will smooth
out most of the high spots and remove any glue blobs. True
the ends of all sheeting and spars at each wing tip.
Fit the Aileron Servo Tray
35