SIG FOUR-STAR 60, Инструкция по сборке, Страница: 9 / 18

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Press the neck into the firewall hole. Allow the silicon sealant to
cure before applying any pressure to the fuel lines.
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2) Glue the 10mm sq. x 94mm balsa strip into position against
the fuselage sides and against the rear of the fuel tank. Trim as
required to obtain a tight fit against the fuselage sides.
NOTE: The engine compartment was fuel proofed during
production of the airplane. However, for a little extra insurance,
you could give the engine compartment an additional coat of
surfacing resin. If you decide to do this, use a brush to apply the
resin and be sure to brush the resin up to the covering edges.
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3) Apply a little thread-locking compound to the four
M4 x 22mm screws and install the two motor mount arms to the
firewall - do not tighten in place yet. As mentioned earlier, these
arms can be positioned to adjust to the width of the engine's
crankcase. Place your engine on the motor mount arms and move
the arms as needed to accept the engine. Also, center the engine
to the fuselage in the top view. When everything appears correct,
tighten the screws, securing the mounts to the firewall.
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4) Use a punch or pencil to mark the engine's mounting screw
locations directly onto the motor mount arms. Remove the engine
and drill the four required holes in the mounts for your engine. If
you are using 6-32 x 1 1/2” screws and lock nuts (not supplied) to
mount your engine, use a 5/32" dia. bit for the clearance holes. Do
not drill and tap these motor mounts. Doing so may weaken them.
Use a little thread-locking compound on all screws when
assembling these components. The muffler should be mounted
after the throttle linkage has been made in the following section.
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5) Some engine configurations have rear-mounted, remote
needle valve assemblies. If you are using this type of engine, you
will have to likely drill a hole in the side of the fuselage to allow the
needle valve to clear. Be sure to fuel proof any exposed wood in
such holes with epoxy resin, clear dope, etc.
4-STROKE INSTALLATION DETAILS:
Note: If you are using a two stroke motor you may move on to the
next section of the instructions.
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6) When using a 4-stroke motor you will have to relocate the
throttle pushrod housing to fit your installation. Remove the
housing from the fuselage now.
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7) Apply a little thread-locking compound to the four
M4 x 22mm screws and install the two motor mount arms to the
firewall - do not tighten in place yet. As mentioned earlier, these
arms can be positioned to adjust to the width of the engine's
crankcase. Place your engine on the motor mount arms and move
the arms as needed to accept the engine. Also, center the engine
to the fuselage in the top view. When everything appears correct,
tighten the screws, securing the mounts to the firewall.
❑
8) Install a Servo Connector (not included) onto the throttle arm
on your motor. Set your motor into position and mark the firewall
with the new location of the throttle pushrod.
Now, remove the motor and drill a 1/8” hole in the firewall at the
marked location. You will also need to drill a new hole in the
fuselage frame that is at the front of the wing if the new location on
the firewall is on the opposite side than the factory installation. The