Great Planes Yak-54 1.60 ARF - GPMA1411 - Manual (Page 8)

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1. If you have not done so already, remove the major
parts of the kit from the box and inspect for damage. If any
parts are damaged or missing, contact Product Support at
the address or telephone number listed in the
“Kit
Inspection” section on page 7.
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2. Carefully remove the tape and separate all the control
surfaces. Use a covering iron with a covering sock to tighten
the covering if necessary. Apply pressure over sheeted
areas to thoroughly bond the covering to the wood.
Do the left wing first so your work matches the photos
the first time through. You can do one wing at a time, or
work on them together.
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1. Test fit the included hinge points into the pre-drilled
holes in the wing panel and aileron. Press the hinge points
into the holes.
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2. The hinge points should seat into the hinge holes all
the way to the metal pin in order to minimize the gap
between the aileron and wing. Use a hobby knife to enlarge
the surface of the hinge holes as necessary until the proper
fit is achieved. Test fit the aileron to the wing. The hinge gap
between the aileron and wing should only be wide enough
to allow a small line of light through. Excessive gap will
decrease the effectiveness of the ailerons.
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3. Apply a small amount of petroleum jelly or something
similar to the center of each hinge to prevent epoxy from sticking
to the joints and preventing the hinge from operating smoothly.
Read all of Step 4 before proceeding.
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4. Mix up a 1/2 oz. [15 cc] of 30-minute epoxy. Using a
toothpick or wood scrap, apply epoxy to the inside of each
hinge point hole. The holes are drilled through to the open
cavity in the wing, so be careful that you do not apply too much
to the walls of the holes as it will simply drip into the wing.
Apply a light coat of epoxy to one end of all the hinges for one
wing panel. Insert the hinge points into the holes in the wing
panel. Wipe away excess epoxy with a paper towel and
denatured alcohol. Be sure the hinges are inserted in the
correct orientation. Apply epoxy to the other ends of the hinges
and slide the aileron into position. Use masking tape to hold
the aileron in place while the epoxy cures.
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5. Cut the covering 1/8" [3 mm] inside the opening in
the wing for the aileron servo. Use a trim iron to seal the
covering to the inner edges of the opening.
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6. Repeat these steps for the right wing panel.
Install the Ailerons
ASSEMBLE THE WING
PREPARATIONS
8