Great Planes Extra 300S 1.60 ARF - GPMA1365 - Manual (Page 12)

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1. Cut the covering from the openings at the rear of the
fuselage for the horizontal stab.
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2. Install the wing onto the fuselage. There is no need to
install the belly pan.
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3. Install the horizontal stab into the back of the fuselage.
Center the stab, making sure the distance from center is equal
on both sides of the stab. Stand back 15-20 ft. [5-6m] and
check to be sure the stab is parallel to the wing. Adjust the stab
saddle as needed until the stab and wing are parallel.
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4. Measure the distance from the tip of each wing to the
tip of the stab. Adjust the stab until the distance from the tip
of the stab to the tip of the wing is equal on both sides.
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5. Use a felt tip marker to mark the outline of the fuselage
onto the top and bottom of the stab.
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6. Remove the stab from the fuse. Use a sharp #11 hobby
knife or use the following Expert Tip to cut the covering
1/16" [1.6 mm] inside of the lines you marked. Use care to
cut only into the covering and not into the wood.
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7. Use 30 minute epoxy to glue the stab into the fuse. For the
most strength, apply epoxy to both sides of the stab and inside
the fuse where the stab fits. Slide the stab into position. Wipe
away residual epoxy with a paper towel and alcohol. Do not
disturb the model until the epoxy has fully hardened.
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8. Cut nine CA hinges for the elevators and rudder just as
you did for the ailerons. Install the CA hinges on the elevators
and the rudder using the same technique used on the ailerons.
Apply six drops of thin CA on each side of each CA hinge.
Use a straightedge to guide the soldering iron at a rate
that will just melt the covering and not burn into the
wood. The hotter the soldering iron, the faster it must
travel to melt a fine cut. Peel off the covering.
HOW TO CUT COVERING FROM BALSA
Use a soldering iron to cut the covering from the stab.
The tip of the soldering iron doesn't have to be sharp, but
a fine tip does work best. Allow the iron to heat fully.
B = B A = A
A A
B B
Install the Stab, Elevator & Rudder
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