Great Planes F-14 60 Kit - GPMA0435 - Manual (Page 10)

D 4. Determine the torque rod bearing locations
from the plan. Then use a hinge slotting tool to cut the
slots in the stabs and f i n s tor the nylon torque rod
bearings. Cut a groove in the trailing edge of the stabs
and fins to accept the torque rods and nylon bearings.
TWO WARPED SPARS INSTALLED
THIS WAY WILL RESULT IN A
STRAIGHT WING
TWO WARPED SPARS INSTALLED
THIS WAY WILL RESULT IN A
WARPED WING
D 5. Trial fit all these parts together using the torque
rods and hinges and t r i m the fin tips flush w i t h the
trailing edges of the rudders. Check the operation of the
control surfaces but do not glue anything yet.
"WING"
NOTE: The following instructions explain how to build
the wing on a flat surface, directly on the plans. The jig
tabs will automatically build in 1-3/4 degrees of washout
and enable you to build a wing as straight as your work
surface. Because this wing has a lot of taper and sweep,
it is not advisable to build it on a Great Planes Wing Jig.
imperfections. If possible, position each spar so the
imperfections (if any) are on the outer half of the wing
panel (toward the tip), where they will be least affected
by high stress. If the spars are warped slightly, try to
"balance them out" by i n s t a l l i n g the warped spars in
opposite directions (see sketch). NOTICE: If you feel
that any of the wing parts are unusable due to severe
warps or other defects, give us a call and we'll replace
the parts.
D 2. Sand 2" of one end of each 1/8" x 3/8" x 18"
balsa spar doubler (F146W05) to a taper as shown in
the "Wing Spar Detail" on the plan.
D 3. Glue the spar doublers to the 1/8" x 3/8" x 30"
balsa spars (F146F04) with thick CA as shown in the
"Wing Spar Detail." Take your time and press the spar
assembly flat against the work surface while the glue is
curing. Also rotate the assembly onto its side and press
it down to keep the doubler and spar aligned and straight.
Do this on a flat work surface and most warps can be
eliminated. Wipe off any excess glue before it cures.
SPARS
D 1. Before using the hard balsa spars, examine
them carefully for possible imperfections. Look for
knots, soft spots, diagonal gram and any other
BUILD THE WING PANELS
NOTE: If you build in the conventional manner, by
pinning the components to your workbench, it will be
helpful to build the wing on a piece of "Celotex"* or
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