Top Flite TOPA0712 - Manual (Page 15)

15
❏
6. Without using any glue, install three hinges into
the holes in the trailing edge of the rudder. Note that the
pivot point of each hinge must align with the center of
the trailing edge. To achieve this alignment, the hinges
will be fairly deep in the fi n. Also note that the hinges
must be perpendicular to the leading edge.
❏
7. Again without glue, test fi t the rudder to the fi n
making sure the rudder control wire fi ts into the hole in
the bottom trailing edge of the rudder. With everything
assembled make sure the rudder moves freely and
the rudder control wire moves in the fuselage without
obstruction.
❏
8. Remove the rudder, control wire and all of the
hinges. Add a small drop of oil to the pivot point on the
hinges and to the control wire where it passes through
the nylon bearing. This will prevent the epoxy from
adhering to the pivot point and the wire. Make sure oil
does not get on the gluing surface of the hinge or the
nylon bearing. If it does, clean the oil off with a paper
towel square dampened with denatured alcohol.
❏
9. Mix up approximately 1/4 oz. [7.4cc] of 30-minute
epoxy. Use a toothpick to thoroughly apply the epoxy in
the holes in the fi n and rudder and the hole in the rudder
for the rudder control wire. Use the toothpick to get the
epoxy out of the opening of the holes in the rudder
and fi n so it doesn’t get into the hinge pin. Wipe away
any excess epoxy around the outside of the holes with
a couple of the small paper towel squares dampened
with denatured alcohol.
❏
10. Use a toothpick to apply epoxy to the ends of the
rudder hinges that go into the fi n. Insert each hinge into
the fi n and wipe away any excess epoxy that squeezes
out of the hole.
❏
11. Apply epoxy to the nylon bearing tongue on the
rudder control wire. Be careful not to get glue between
the nylon bearing and the wire.
❏
12. Apply epoxy to the other end of the hinges. Join
the rudder to the fi n, pushing the hinges only about
3/4 of the way into the rudder. Use a toothpick to wipe
away any epoxy that squeezes out. Be sure the nylon
bearing is inserted into the hinge slot in the vertical fi n
and the wire fi ts into the hole in the rudder. Then fi t the
rudder the rest of the way in.
❏
13. Move the rudder left and right to align the hinges.
If needed, use a length of masking tape to hold the
rudder to the fi n. Allow the glue to fully cure.
❏
14. Cut a 4-40 x 48" [1220mm] metal pushrod to a
length of 33" [838mm]. Install a 4-40 nut, silicone clevis
keeper and 4-40 threaded clevis on the threaded end of
the metal pushrod. Install the clevis into the hole second
from the bottom of a large black control horn. Insert the
pushrod wire into the pushrod hole in the right side of the
fuselage until the control horn is resting on the elevator.
❏
15. Where the elevator control horn rests on the
elevator there is a plywood plate. Position the horn
over the plate on the elevator. Drill a 3/32" [2.4mm] hole
through each of the holes in the control horn. Drill only
through the plywood plate. Do not drill through the top
of the control surface. Mount the horn with four #4 x
1/2" [13mm] screws.