Top Flite TOPA0220 - Manual (Page 20)

❏ 7. Position the servo and rails so that the pushrod
wire lines up properly with the pushrod tube. Tack
glue the rails to the fuselage sides. After the CA has
cured, mark the location of the servo mounting
holes. Then, remove the servo and pushrod wire.
Securely glue the rails to the fuselage sides and the
face of F3 with epoxy.
❏ 8. Drill pilot holes for the servo screws and mount
the servo to the rails with the screws, grommets and
eyelets that came with the servo. Remove the servo
and harden the mounting holes with a drop of thin
CA. After the CA has cured, remount the servo to
the rails.
❏ 9. Cut the spacer bar off both engine mount
halves and trim off any flashing so they fit together.
Temporarily mount the engine mount to F1 using four
6-32 x 3/4" [19.1mm] socket head cap screws, #6
lock washers and #6 flat washers. Place your engine
on the mount, adjusting it for the width of the engine.
Mark the location of the hole for the throttle pushrod.
If you are using an O.S. .46 FX the location is already
marked. Remove the engine but leave the engine
mount in place.
Note: To allow as much room as possible for the fuel
tank, the throttle pushrod should be placed as close
to the fuselage side as possible. See the photo at
step 10.
❏ 10. Drill a 3/16" [4.8mm] hole for the throttle
pushrod at the location you marked. Using a piece of
leftover plastic pushrod tube, install the throttle
pushrod tube in the hole you just drilled in F1 and
into the hole in F2. Trim the tube to length so that it
extends about 1" [25.4mm] beyond F1. Remove the
tube and roughen the ends where it will be glued in
place later. Reinstall the tube.
❏
11. Note the position of the throttle servo on the plan.
You will need to cut a hole in the deck for the servo. If
you are using a full size servo, this hole must be close
to the centerline of the model. A mini servo can be
placed close to the side of the fuselage, allowing room
for the switch mount on the other side. Cut a hole for the
servo you will be using, using the plan as a reference.
The photo shows a full size servo.
❏ 12. From the 1/8" x 1/4" x 24" [3.2 x 6.4 x 610mm]
basswood stick, cut two servo mounting rails to a
length of 2-5/8" [66.7mm]. Glue these rails to the top
deck on the inside of the fuselage. Install the throttle
servo, drill pilot holes for the mounting screws and
install the screws, grommets and eyelets that came
with the servo. Remove the servo, harden the
mounting holes with a drop of thin CA and remount
the servo when the CA has cured.
❏ 13. Turn the fuselage over and hold former F2T in
position. Make sure the throttle servo will clear the
sheeting that will be glued to F2T.
Note: You may need to trim some of the 3/16"
[4.8mm] sq. stringer that will be glued to the notch
in F2T.
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