Great Planes Ultra Sport 40 Kit - GPMA0410 - Manual (Page 25)

the saddle slightly until the wing sits level in the saddle.
Also measure from the rear comer of each wing tip to the
tail end of the fuselage. These measurements must also
agree within 1/16". If not, shift the wing slightly until
they do. With the wing in this position you may now
check the wing incidence using an "incidence meter'' or
by measuring down to the flat surface from the center of
the leading and trailing edges. The measurements should
be the same (zero degrees incidence). CAUTION: If
your flat surface is not level, you will get erroneous
incidence readings, in which case you should set the
wing incidence the same as your flat surface.
7. After making the necessary corrections to align
the wing, tack glue F-2A to F-2 with a couple drops of
CA. Also make alignment marks on the wing TE and
the front ofF-4 so you may easily re-align the wing later.
1/16" WING BOLT PLATE
DRILLING L O C A T I O N S
8. Remove the wing and securely glue F-2A in place
by flowing thin CA into the wing dowel holes and around
the edges. Follow up with thick CA in any gaps around
the edges.
9. Drill 1/4" holes through F-2 using the holes in
F-2A as a guide.
12. Holding the wing firmly in place, drill 13/64"
holes at the locations you marked in step 11, drilling
down through the 1/16" ply wing bolt plate and through
the 1/4" ply hold-down block in the fuselage. Try to drill
straight in, perpendicular to the 1/16" ply bolt plate.
IMPORTANT!: Do not allow the wing to move while
drilling!
10. Use a pliers to grasp the ends of the wing dowels
13. Remove the wing and re-drill the holes in the
wing only to 1/4".
and pull them out. Now you may slightly round (or
chamfer) the ends of the dowels for easier insertion into
F-2A. Mix up a batch of 30-minute epoxy, use a long
stick to work some epoxy into the dowel holes, smear
epoxy on the dowels, then re-insert the dowels into the
wing, leaving them protrude 3/8". Wipe away all excess
epoxy, then allow the epoxy to fully harden.
11. Study the wing plan to determine where the wing
bolt holes are to be drilled. By measuring, transfer the
locations to the wing bolt plate on the bottom of the wing.
After marking the bolt locations, replace the wing in the
saddle, and re-align it accurately as in step 6.
14. Use a 1/4-20 tap and a tap wrench to cut threads
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in the ply hold-down block in the fuselage.