Dynaflite GPMA0090 Butterfly - Manual (Page 32)

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4. Use a MonoKote Iron or a Trim Seal Tool to
seal the perimeter of the reinforcements onto the
fi n and stab.
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5. If necessary, cut 1/4" strips of MonoKote fi lm
and use your Trim Seal Tool to iron the strips in the
“corners” where the bottom of the stab meets the
fuse and the dorsal fi n meets the top of the fuse.
Hinge the Control Surfaces
IMPORTANT: Make sure you join the elevator
to the stab before you join the rudder to the fi n.
Cut the covering away from the slot
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1. Use your hobby knife and a sharp #11 blade
to remove a small strip of covering from the hinge
slots to expose them.
The CA wicks along
the “tunnels” to the
entire hinge surface.
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2. Drill a 3/32" hole in the center of all the hinge
slots to allow the CA to fully penetrate. This is best
done with a high-speed tool such as a powered
hand tool. If you use a drill, remove slivers of balsa
wood from the hinge slots with a hobby knife after
you drill the holes.
Temporary pin
to keep hinge
centered
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3. Join the elevator to the stab with the hinges.
The horn plate of the stab (where the control
horn is fastened) should be on the right side. If the
hinges will not stay centered, insert a pin through
the center of the hinge, then join the surfaces and
remove the pins.
❏ 4. Confi rm that the ends of the elevator align with
the ends of the stab, that the hinges are centered
and there is approximately a 1/32" gap between the
TE of the stab and the LE of the elevator. A small
gap is desirable so you do not inadvertently glue
the elevator to the stab with residual CA.
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5. Carefully apply 6 drops of thin CA to each
side of all the hinges. Keep a tissue handy to wipe
away excess CA. If you spill a few drops of CA
on the MonoKote fi lm you can use CA Debonder
(GPMR6039) to remove it. Or, wait until the CA
fully cures, then carefully lift it off with a hobby
knife blade.
Do not use accelerator on any of the hinges. Do
not glue the hinges with anything other than
thin CA and do not attempt to glue one half of
the hinge at a time with medium or thick CA.
They will not be secure and the controls could
separate while the model is fl ying.
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6. Let the CA fully cure, then fl ex the elevator
several times to check the movement.
❏
7. Hinge the rudder the same way as the elevator.