Instruction manual

Page 16 of 18 pages
(Note: Adjust the following final steps in accordance with your engine & radio equipment setup preferences.)
8
0
. The factory-installed firewall mounting-bolt pattern is
2 7/16-inch high by 3 1/32-inch wide. If this pattern
matches your engine, using the four(4) pre-installed
blind-nuts inside the engine-mounting box, mount your
engine (with its cylinder head and carburetor positioned
to fit inside the cowl) [56:24].
NOTE: Since there is no “industry standard” engine
mounting-bolt pattern, the factory-provided firewall
mounting-bolt pattern will not fit all engines. If you
must drill new engine-mounting holes in the engine-
mounting box’s firewall, use the vertical and horizontal
lines on the firewall to center your engine’s propeller
shaft. Then mark and drill the required holes.
(Note: If a factory-installed T-nut is in the way where a
new hole is required, and if you find the factory-installed
T-nut cannot be removed from the firewall:
1. Cut away and discard the T-nuts and the central area
of
the factory-installed firewall; 2. Make a new firewall
from 9 mm or 3/8-inch thick plywood, 3 3/4-inch high
by 4 3/4-in wide; 3. Cut engine-mounting and fuel line
holes in the new firewall and 4. Using 30-minute epoxy,
permanently secure the new firewall to the front of the
engine-mounting box.)
81. Position the supplied fuel tank inside the engine-mount-
ing box with its tygon fuel lines exiting the box behind the engine [57:46].
82. Slide the engine-mounting box into the fuselage [58:50].
83. Position the engine-mounting box so the propellor’s backplate
projects 1/2-inch forward of the cowl’s radiator; secure the
engine-mounting box to the fuselage with triangular-wood
stock, screws and 30-minute epoxy; then prepare cowl
mounting points.
84. Install your engine’s high-voltage ignition module, its battery
and your radio-operated ignition “kill” switch; connect the
“kill” switch to your radio’s receiver.
85. Connect the fuel lines; install and connect the throttle servo to
the radio’s receiver; and mount and connect the radio’s
ON/OFF switch to the radio’s receiver.
3 1/32
inch
2 7/16
inch
Engine’s
propeller backplate
projecting ~½-inch
forward of the
Jenny’s cowl
Engine mounting box
secured in the
fuselage opening
with
high-voltage module,
throttle linkage,
and throttle servo
CR
RC 50cc engine
mounted on a
replacement
firewall
Typical
cut line
Securely attach the new
firewall to the front surface
of the original firewall