Great Planes Tutor Park Flyer Kit- GPMA0002 - Manual (Page 16)

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1. Start with the right wing panel. Holding the middle of
the wing, twist the trailing edge of the right wing tip upward.
The amount of washout to shoot for is 1/8" [3mm], so begin
by twisting about 1/2" [13mm] (because the wing will
“spring” partway back to its original position after re-
shrinking the covering in the next step).
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2. Note the wrinkles in the covering while holding the
wing. Have an assistant heat the covering on the top and the
bottom until the wrinkles disappear. Allow the covering to
fully cool before letting go.
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3. Lay the right wing panel on your flat workbench. Apply
light pressure to hold it down, then use a 1/8" [3mm] piece
of balsa as a gauge to see if you have added the correct
amount of washout. If necessary, continue to twist the wing
and remove the wrinkles until the correct amount of washout
is achieved.
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4. Add washout to the left wing panel the same way.
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5. Check the wing periodically to be sure the washout
remains. Twist and shrink the covering as necessary to
retain the washout.
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1. Use a small pin to poke several holes through the
covering in the top of the stab along the center rib. These
holes will absorb the CA that will be used to glue the fin to
the stab and will make for a stronger glue joint.
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2. Position the fin over the center rib on the stab. Be
certain the trailing edge of the stab is 1/8" [3.2mm] ahead of
the trailing edge of the fin as shown on the plan. Use a
builder’s square to get the base of the fin perpendicular to
the trailing edge of the stab. Holding the fin in position, use
the builder’s square to hold the fin vertical, then glue it to the
stab with thin CA.
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3. Mount the wing to the fuse with two #32 rubber bands.
(When it’s time to fly the Tutor, use four #32 rubber bands.)
Note: If you have built your wing with ailerons, trim the front
edge of the aft fuse top sheeting and cut notches in the top
of former F3 to accommodate the aileron torque rods. (Even
though the fuse is not completely covered in this photo, it
should be on your model at this time.)
Join the Tail Surfaces
FINAL ASSEMBLY
Note: For a small, lightweight model such as the Tutor, it is
not critical to get exactly 1/8" of washout. However, it is
important that some washout be present in both wing tips.
Do your best to achieve the washout recommended, but
don’t spend hours trying to do so. A slight variance in both
wing tips is acceptable, as long as neither of the wing tips
has any “wash-in.”
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