Top Flite TOPA0220 - Manual (Page 45)

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2. Cut ten 1/4" [6.4mm] long pieces from the 6-1/2"
[165mm] white plastic pushrod material. Slide five of
these spacers onto each of the pushrods. Position the
spacers as shown in the above sketch. Wick a drop of
thin CA between each spacer and the wire. Soak up
any excess CA with a paper towel. Make sure the CA
has cured before proceeding.
Important: Make sure you position the spacers that
are at the ends of the wire so they will not protrude
from the guide tube when the servo is at its full travel,
or the control could become jammed during flight.
❏
3. Insert one of the pushrods into the elevator
pushrod tube. Install the elevators on the stab with
the hinges and joiner wire in place. DO NOT glue the
hinges yet.
❏ 4. Mount a small nylon control horn to the ply
control horn mount on the right elevator with two
2-56 x 1/2" [12.7mm] screws and nylon backing
plate. Use a 5/64" [2mm] drill for the holes. Use the
pushrod wire as a guide in locating the control horn.
❏ 5. Connect the clevis on the elevator pushrod wire
to the elevator horn. With the elevators neutral, mark
the pushrod wire at the servo arm where you will
make a Z-bend. Make sure that the elevator is
centered and that the servo arm is at 90 degrees to
the servo.
❏ 6. Make a Z-bend on the wire at the marked
location. Cut the excess wire from the pushrod.
Insert the wire into the servo arm and connect the
clevis to the elevator horn. Adjust the clevis as
needed so that the elevator is centered with the
servo arm at 90 degrees to the servo. Hint: It will be
easier to make the Z-bend if you disconnect the
clevis from the control horn and push the pushrod
wire further into the fuselage.
Important: The elevator pushrod wire is inserted
into the bottom of the servo arm.
❏ 7. Make and install the rudder pushrod wire in the
same manner.
Important: The rudder pushrod wire is inserted into
the top of the servo arm.
❏ 8. With the receiver installed and all of the servo
wires connected to the receiver, glue the rudder outer
pushrod tube brace to the front elevator servo rail. The
tube should rest on the servo rail. Plug in any 6"
extension wires you plan on using for the servos
mounted in the wing. Route the receiver antenna, being
sure to install a strain relief on the wire.
Note: If it becomes necessary to remove the
receiver you will need to cut the brace.
❏ 9. Start installing the hinges with the stab and
elevators. Remove a small strip of covering from the
hinge slots.
❏ 10. Fit the hinges in only the stab or elevators,
without glue. Fill the joiner wire holes in the elevators
with 30-minute epoxy. Immediately proceed to the
next step.
❏
11. Join the elevators to the stab with the hinges,
simultaneously installing the joiner wire in the
elevators. If the hinges don’t remain centered as you
Before you glue in the hinges, apply a few drops
of household oil to a tissue. Wipe the tissue over
the trailing edge of the stab and the leading edge
of both elevators coating them with a fine film of
oil. This will prevent excess CA you use for gluing
in the hinges from sticking to the elevator and
stab at the hinge gap.
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