Top Flite TOPA0220 - Manual (Page 21)

❏
14. Install a Screw-Lock connector, nylon
retainer and 4-40 x 1/8" [3.2mm] socket head cap
screw on the outside hole of the servo arm. Install
this arm on the throttle servo. Install a .074 x 12" [1.6
x 305mm] throttle pushrod wire into the throttle
pushrod tube. If needed, adjust the location of the
hole in F2 so that the pushrod lines up with the
screw-lock connector.
Note: You may need to put a small bend in the wire
as shown in the photo. Note also that there will be
minimal clearance between the pushrod linkage and
the wing when it is installed. It may be necessary to
trim a small hole in the wing to clear the linkage.
❏ 15. Note the position of the rudder servo on the
plan. It is mounted in the same manner as the
throttle servo. You will need to cut a hole in the deck
for the servo. This hole must be close to the
centerline of the model for either a full size or mini
servo. Cut a hole for the servo you will be using,
using the plan as a reference.
❏ 16. From the 1/8" x 1/4" x 24" [3.2 x 6.4 x 610mm]
basswood stick, cut FOUR servo mounting rails to a
length of 2-5/8" [66.7mm]. Glue two of these rails to
the top deck on the inside of the fuselage. Glue a
second set of rails on top of these rails. This will
space the rudder servo 1/8" [3.2mm] further from the
deck than the throttle servo. Install the rudder 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.
❏ 17. Locate the die-cut 1/8" [3.2mm] ply rudder
pushrod brace. Carefully drill a 3/16" [4.8mm] hole in
one end of this brace at the pin point punch mark. Slide
the brace onto the rudder pushrod tube but do not glue
it into place until after the receiver is installed.
❏ 18. Locate the 36" [914mm] wire pushrod, with a
Z-bend in the end, that you used earlier for the
elevator servo installation. Temporarily install the
wire pushrod in the rudder pushrod tube and install
the rudder servo arm on the wire pushrod. Install the
servo arm on the rudder servo. Note the location of
the ply rudder pushrod brace.
❏ 19. Remove all of the pushrods. Leave the engine
mount in place.
INSTALL THE RECEIVER
The photos that follow show the installation of the large
Futaba 7-channel FM receiver. There are several other
7, 8 and 9 channel receivers that are smaller.
❏ 1. Using the plan as a guide, cut a hole in the top
deck for the receiver. Make sure the hole is large
enough for the 1/4" [6.4mm] foam that the receiver
will be wrapped in. The receiver should fit firmly in
this hole.
Note: A slot has been cut beside the servos to allow
the servo wires to be neatly routed to the receiver.
Note also the routing of the receiver antenna.
❏ 2. Turn the fuselage over. Note also how the servo
wires have been routed and that tie wraps are used
to keep the installation neat. The tie wraps are short
lengths of fuel line.
Caution: Once the top of the fuselage has been
sheeted, be careful not to push the receiver firmly into
its cutout. This could cause the receiver to contact the
top sheeting and cause it to split the sheeting.
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