Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 17)

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3. Place a Great Planes Plan Protector under the center
of the wing to catch excess epoxy. When satisfied with the
fit, glue the die-cut 1/16" ply dihedral braces (DB) to the
spars with 30-minute epoxy by spreading a film of epoxy on
both the spars and the dihedral braces and using C-clamps
to hold them in place. Once the C-clamps are tightened,
wipe away excess epoxy before it cures. Place weights on
top of your wing to hold it in place.
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4. Glue the TE’s together with thin CA. Do not disturb
the wing until the epoxy cures.
❏ 5. Drill two 1/4" holes in the each of the two die-cut 1/8"
ply dowel plates (D).
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6. Glue the die-cut 1/8" ply sub ribs (2D) to one of the
dowel plates, using a square to assure alignment.
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7. Glue the other dowel plate into the slots in the sub
ribs. Note: Make sure the “V’s” on the dowel plates are
both on the same side.
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8. Measure and make an accurate reference mark at the
center point on the top of both dowel plates.
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9. Use 6-minute Great Planes Pro Epoxy to glue the
dowel plate to the dihedral brace, aligning the center mark
you made with the spar joint, and clamp it in place. Note:
Do not allow epoxy to get in the dowel holes on the
dowel plate.
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10. Glue the forward dowel plate and the sub ribs to the
wing sheeting with thin CA.
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