❏
7. Attach a 12" servo extension to the throttle servo and
use tape or heat shrink material to secure it in place. Insert
the servo lead into the hole in the former located inside the
engine-mounting box. Place the servo, noting its orientation
in the photograph above, in the pre-cut space on the bottom
of the engine mount box as shown in the photo. Using the
same techniques shown on page 8, mount the servo by
drilling four 1/16"(3mm) holes using the hardware that came
with the servo to secure it into place.
Make the throttle pushrod from the supplied 2-56 x 17-1/2"
(466 mm) threaded one end throttle pushrod. Thread a nylon
clevis onto the threaded rod approximately 25 turns, add a
clevis retainer, and attach the clevis to the throttle arm on the
carburetor on the engine. Make necessary bends in the rod to
allow it to clear the engine and muffler. Then connect it to the
throttle servo arm by making a 90-degree bend and using a
nylon Faslink connector to secure it into place.
NOTE: This model will accept a number of different
engines including gasoline-powered engines. We have
just gone through the process of mounting a typical two-
stroke engine in the previous steps. We will now go
through the process of mounting a gas engine, using the
US Engines 41cc 2.5 Gas Engine (USEG0041). Notice that
the drive washer of any engine should be placed 6-1/2"
(165 mm) forward of the firewall. The use of some engines
may require alterations of the engine mounting box.
❏
1. Since this engine mounts with bolts from the rear of a
traditional firewall, we will make a plywood mount to be
attached to the engine. After this mount is attached to the
engine it will then be mounted to the existing firewall. First
of all make two 4" [102mm] x 4" [102mm] x 1/4" [6 mm]
plywood mounting plates [not supplied]. Draw center marks
on one of these plates as shown above. This plate will be
used as the front half of your mount. Do not glue these
pieces together at this time.
❏
2. Place the front side of the front plate (the one with the
center marks) against the back of the engine and mark the
location of the mounting holes with the engine centered on
the mount. Also draw the outline around the back of the
engine as shown in the photograph.
Note
: Depending on
the muffler used you may need to relieve a portion of the
mount to accommodate your muffler. Drill 1/4" [6mm] holes
in these four locations through both plates.
24
