Great Planes Tutor Park Flyer Kit- GPMA0002 - Manual (Page 15)

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9. Drill 1/16" [1.6mm] holes through the marks in F1 and
the balsa strips.
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10. Use medium CA to glue F1 to the fuse sides and to
the forward fuse bottom. (You can see F1 in the following
photo.) Be certain F1 is in alignment with the edges of the
fuse sides as this sets the correct motor right-thrust and
down-thrust. Also be certain that the hole for the motor in F1
is nearest the top.
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11. Use leftover 1/32" [.8mm] balsa to sheet the front of
the fuselage. Note that the grain runs across the fuse. Sand
the edges of the sheeting flush with the fuse sides.
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12. Test fit, then glue the landing gear plate to the bottom
of the fuse and former F2.
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13. Use a bar sander with 150-grit paper to sand the fuse
top and bottom even with the fuse sides. Slightly round the
corners as shown in the cross-sections on the fuse plan.
Sand the fuse smooth with progressively finer grits of
sandpaper.
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1. If you haven’t done so already, sand all parts of the
model smooth with 320-grit, then 400-grit sandpaper.
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2. Use compressed air (be careful!), a dust brush or a
tack cloth to remove balsa dust from the model.
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3. Determine what material you will be covering the
model with. If using Top Flite EconoKote ® , the model is
ready to cover. If using Coverite ™ Micafilm ™ , coat the areas
to be covered with Coverite Balsarite ™ (COVR2500). Be
certain you use the formula for Micafilm, and not the formula
for regular film covering.
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4. Follow the suggested covering sequence to cover the model.
IMPORTANT: Do not shrink the covering until both sides of
each part are covered. This will reduce the tendency for the
surfaces to twist.
Tail Surfaces:
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1. The bottom, then the top of the stabilizer
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2. Bottom, then top of elevators
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3. Fin
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4. Rudder
Fuselage:
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1. The bottom of the fuse
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2. Sides
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3. Top
Wing:
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1. The bottom of the wing
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2. Top of the wing
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3. Ailerons (if used)
Note: It may be easier to cover the wing tips separately,
after the rest of the wing has been covered.
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1. After all the tail pieces are covered, inspect the stab
and fin for twists. If necessary, lightly twist the part in the
opposite direction and apply heat to the covering until you
can get it flat.
An important characteristic of most airplanes is their ability
to resist stalling, or to stall gently. Simply stated, a stall is
when the wing no longer produces lift–basically the model
quits flying until it regains airspeed. A stall can occur when
attempting to climb too rapidly, or when the model runs out
of airspeed (such as when trying to land too slowly). One
way to prevent or delay a stall is to add “washout” to the
wing. Washout is an upward twist at both wing tips, so that
the trailing edge is higher than the leading edge. If the wing
tips are raised slightly, or are at a lower angle than the rest
of the wing, the outer portion of the wing will continue to
produce lift (fly) even though the rest of the wing has quit
flying, thus resisting a stall. Because the Tutor is designed
to be light, it would be difficult to build this required twist into
the wing. The following procedure explains how to add
washout, which is common for lightweight structures such
as this.
Add “Washout”
Suggested Covering Sequence
COVER THE MODEL
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