Carl Goldberg GPMA1959 Sophisticated Lady Glider ARF - Manual (Page 4)

4
INSTALL THE FIN
1. Use a felt tip pen to draw a centerline on the top aft end
of the fuselage. Draw a line 3/32" [2.4mm] on both sides of
the centerline. Position the fi n on the fuselage and mark on
the top of the fuselage, all the way around the fi n.
2. Using a hobby knife with a fresh blade, cut and remove
the covering only between the two outside lines. DO NOT
cut the wood under the covering as this will weaken the
structure. Also, insert the fi n in the fuselage and mark the
tail post where it exits the fuselage. Trim the covering from
the tail post and alignment tab.
3. Insert the elevator control cable into the nylon outer
control tube in the fuselage and the fi n. Apply petroleum jelly
to the cable to insure epoxy doesn't adhere to it. Position
the fi n on the fuselage and move the cable to check that it
moves freely.
4. Use 6-minute epoxy to glue the fi n to the top of the
fuselage. Wipe off the excess epoxy with a paper towel
dampened with rubbing alcohol. Use masking tape to hold
the fi n in position, aligned with the centerline of the fuselage
and parallel to the sides.
Drill a 3/32" Hole
1/2" Deep, in the Center
of the Hinge Slot
5. Drill a 3/32" [2.4mm] hole, 1/2" [13mm] deep, in the
center of the fi n and rudder hinge slots. If you use a Dremel®
Rotary Tool for this task, it will result in a cleaner hole than if
you use a slower speed drill. Drilling the hole will twist some
of the wood fi bers into the slot, making it diffi cult to insert the
hinge. Insert a hobby knife blade in the slot, working it back
and forth a few times to clean out the slot.
Temporary Pin
to Keep Hinge
Centered
6. To keep the hinges centered, insert a pin in the center
of the hinges.