GREAT PLANES Old Timer, Instruction Manual

Page: 28 / 46

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1. Position the wing in the wing saddle and visually align
it with the fuselage.
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2. Use a tape measure to measure the distance from the
corner of rib W10 to the center of the tail. Then, measure the
distance on the other side of the fuselage to check if the
distances are the same. Adjust the wing until both distances
are equal. When the wing is perfectly aligned, make
reference marks on the wing trailing edge and the aft fuse
deck to help keep the parts aligned during the next step.
❏
3. Tape the wing in position so that it cannot move. Use
a 13/64" (or #10) [5mm] drill bit to drill a hole through the
wing at the two punch marks on the wing bolt plate. Two
small 90° triangles will help you to align the drill
perpendicular to the top surface of the wing. Important: Do
not allow the wing to shift during this procedure.
❏
4. Remove the wing and use a 17/64" [6.7mm] drill bit to
enlarge the holes in the wing only.
❏
5. Use a 1/4"-20 tap to cut threads into the wing hold
down blocks. After cutting the threads, put a couple of drops
of thin CA on the threads in the wing hold down blocks.
Allow the CA to cure before threading the tap back through
the holes to clean up the threads. Bolt the wing to the fuse
with two nylon 1/4"-20 wing bolts, checking the fit.
❏
1. Insert a leftover 1/4" x 1/2" [6.4mm x 12.7mm] balsa
stick in the aft end of the fuselage. The edge of the stick
should be aligned with the aft end of the fuse and protrude
above the stab saddle by 1/2" [12.7mm].The stick is to align
the TE of the stab with the aft end of the fuse.
❏
2. Test fit the stab on the fuse. You may need to sand the
front of the stab slightly to allow the stab to fit properly.
Mount the Stabilizer & Fin
Mount the Wing on the Fuselage
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