Engine Installation - Horizon Hobby HANGAR 9 Carbon Cub FX-3 Manuel D'utilisation

ENGINE INSTALLATION

 To increase the strength of the engine mounting areas
and to stop possible compression of the wooden firewall.
There are two fiberglass plates fitted (front and rear) of
the firewall. Be aware of this when drilling for the engine
mount. Also be aware that blind nuts cannot be used to
attach the engine, as they might be on a smaller aircraft.
115. Place the mounting template on the fi rewall. Use a drill
and 3/32-inch (2.5mm) drill bit to drill the four holes in the
fi rewall.
 When using power systems other than the recommended
choices, we advise using the mounting template as a test
to ensure hole alignment before drilling the firewall.
116. Remove the template from the fuselage. Use a drill and 1/4-
inch (6mm) drill bit to enlarge the holes from the previous
step.
117. Attach the engine to the fuselage using four M6 x 75 socket
head cap screws, four spacers and four M6 nuts. Make
sure to use thread lock on the screws to prevent them from
vibrating loose.
118. Use the appropriate screws and spacers to achieve a spacing
of 213mm between the fi rewall and face of the drive washer.
 The engine to driver washer measurement
can be between 207mm and 219 mm.
EN
119. Attach the muffl er on the carburetor linkage side. Assemble
the linkage to operate the carburetor. Install the throttle servo
in the servo mount and position the mount so the linkage will
clear the muffl er. Make sure to mark the location of the mount
on the engine box.
120. Remove the servo from the servo mount, and the muffl er from
the engine. Use 30-minute epoxy to glue the servo mount to
the engine box. Make sure the servo mount does not move
while the epoxy cures.
 The cover can also removed for the installation of
internal canister type mufflers. If stock mufflers
are fitted the cover can either be left on or off.
121. Once the epoxy cures, install the throttle servo and linkage. A
choke servo can also be mounted in the servo mount. Check
the operation of the servos using the radio system.
 The choke access can be accessed by fitting a
hand through the front cowling intake hole. Be sure
to check if your hand is small enough to fit into
the cowling before committing to this option.
122. Remove the cover behind the throttle servos and set the
screws aside.
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