Great Planes PT-60 Kit - GPMA0119 - Manual (Page 23)

D D 13. Use a razor saw and sanding block to trim the
inboard end of the LE and TE even with the centerline on
the plans.
That's one wing panel down and looking mighty sassy I
might add! Don't just sit there admiring your handiwork, you
still have work to do. Slap some waxed paper on the other
half of the wing plan, then repeat steps 1 -13 to build the
left wing panel. You can rest later.
IF YOU ARE BUILDING THE TRAINER VERSION,
SKIP THIS INSTRUCTION AND PROCEED TO
STEP1.
If you are building the Sport Wing, use the patterns
on the wing plan to cut two new spar joiners, four
dihedral braces, LE and TE joiner and a dihedral
angle gauge. Materials for these parts are specified on
the plans but are not included in this kit. Follow exactly
the same steps but substitute your new parts for the
die-cut ones.
Modify the washout Jigs for only the sport wing as
follows:
Draw a straight line through the punch marks on the die-
cut 1/8" ply washout jigs, then cut off the bottom portion
of the jigs on the lines. Hold both of the top halves
together to make sure they are identical. If not, use a
sanding block to even them up.
D 2. Sand the root (inboard) edges of both wing panels to
match the dihedral angle you drew. It's helpful to make an
oversized sanding block for this operation, so that you will
sand each part simultaneously and evenly. When you
check the fit at the center of the wing you must raise one
wing tip 6-1/2" for the "Trainer wing" or 4" for the "Sport
wing". Support the tip on a stack of books to be sure
everything will line up and fit flush. Take your time and try to
get all the parts sanded to the correct length and angle, so
they all butt together when the wing is joined.
D 3. Draw a centerline on each of the dihedral braces, LE
and TE joiners and the center joiners.
The wing panels need to be realigned on the plans and
pinned to the building board for the next step.
D 1. Working over the plans, hold the die-cut 1/8" ply
dihedral gauge (DG) in contact with the LE, spars, and TE,
with the "arrow" pointing up and the rounded corner
toward rib R-2. The bottom outside corner must be even
with the bottom outside corner of each part as shown in the
photo. Mark the dihedral angle on each part. Repeat for the
other wing panel. Remove the wing panels from the board.
D 4. Without glue. test fit the dihedral braces on each side
of the slotted web, the spar joiners on both sides of the
spars, the front rib assembly, and the LE joiner. Carefully
plug the other wing panel into the first wing assembly.
Examine the joint carefully. There should be no gaps
between any of the parts, especially the main top and
bottom spars. If necessary, make small corrections with a
sanding block, checking progress regularly to avoid
"over correcting."
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