Great Planes Ultra Sport 40 Plus Kit - GPMA0390 - Manual (Page 39)

mounting plate doubler (MPD). Glue the two parts
together with 30-minute epoxy as shown on the plans. Then
glue the assembly in position as shown in the image on the
previous page.
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2. Mark the center of the fuselage at the wing trailing
edge (former F4). Insert the wing dowels into the wing dowel
holes in former F3. Push the wing down until the wing
trailing edge hits the bottom of the fuselage. Sand the
trailing edge of the wing flat as shown on the plan until the
wing fits in the fuselage saddle. Make sure it remains
centered.
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3. Draw a straight line 1/2" [13mm] away from the wing
trailing edge at the bottom of the wing. Also, draw a line at
the center of the die-cut 1/8" [3.2mm] lite-ply wing bolt
plate (WBP).
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4. Align the aft edge of the wing bolt plate (WBP) with
the line on the wing (remember, you are working on the
bottom of the wing). Also align the centerline on WBP with
the wing’s centerline. Glue the wing bolt plate in place with
epoxy. Use clamps to hold the wing bolt plate in place while
the glue cures.
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5. Align the wing to the fuselage using the above sketch.
Use a 13/64" [5.15mm] or #25 drill bit to drill into the wing
and through the wing mounting plate in the fuselage. Make
sure the hole is perpendicular to the wing bolt plate. Remove
the wing.
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6. Use a 1/4-20 tap to thread the holes in the wing
mounting plate (WMP) in the fuselage. Use thin CA to
strengthen the threads and re-tap the holes with the same
39