9
stopper in the same orientation as shown in the photo again,
leaving a 1/2" of the tubing protruding form the stopper. Note: The
neck of the fuel tank is NOT located in the center of the tank body
and is offset to one side. The offset side is the BOTTOM of the fuel
tank.
b. Add the length of fuel tubing and the clunk to the pick-up
vent and install the stopper assembly into the tank. Make sure that
the clunk is free to move up and down and side to side in the back
of the fuel tank. When satisfied, secure the stopper with the small
tie-wrap that has been provided. Cut two 8" or so lengths of fuel
tubing (gasoline compatible such as Du-Bro Tygon) and place onto
each of the two fuel tank lines. Label each of the vents to insure
proper identification during assembly.
c. Working through the wing opening in the bottom of the
fuselage, slide the fuel tank into position while routing the fuel lines
through the firewall. Secure the fuel tank in place with two #67
rubber bands (or four #64 hooked together) by attaching each end
of the rubber band to the laser-cut hooks in the tank floor. Note:
It is a good idea to isolate the fuel tank from vibration by
sandwiching a piece of 3/8" foam between the tank floor and the
fuel tank.
HATCH:
❑
18) Gas engines with electronic ignition require a separate
battery pack to power the ignition module. In the case of our FPE
3.2, we used a 4-cell 1200 mAh battery pack for this purpose. This
battery pack provides about 2 hours of running time before
needing recharging. Note: Please keep in mind it is a good idea
to have as much separation between the components of the
engine ignition system and radio flight system as possible to
prevent possible interference with the flight radio.
a. We mounted our ignition battery to the inside of the hatch
by gluing two pieces of 3/8" x 3" square basswood to the hatch
using the dimensions shown in the photo. Next, drill four 3/32"
holes in the basswood and thread in four "J" bolts. Wrap the
battery pack in foam and secure it to the hatch with two #64
rubber-bands.
b. The ignition system must be able to be turned on and off
as needed and this means that there must be a separate switch for
this purpose. We used a standard radio system switch assembly,
with a charging receptacle, for this purpose.
The charging
receptacle can be easily accessed from the wing opening in the
fuselage without removing the hatch. Mount the switch to the
hatch using the dimensions shown in the photo. Install the hatch
with four 2.6 x 8mm screws provided.
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19) The throttle servo can be mounted on either the left or right
side of the fuselage depending on the engine used. For the FPE
engine, mount the servo on the right side (on the left when viewed
from the bottom) with the hardware and screws provided with the
servos. Install the metal Ball-link stud into the outer most hole in
the servo output arm and secure in place with a 2-56 hex nut.
Note: A laser cut plywood throttle servo mount has been
provided to mount the throttle servo in an alternate location if other
than the FPE engine is used.
With gas engines, it is especially important to avoid any metal-to-
metal connections in your throttle linkage. This is because such
connections may cause unwanted RF (radio frequency) "noise".
Such RF noise can interfere with the radio system. Therefore, it is
important to use the provided nylon pushrod and nylon ball-link
fitting at the engine's throttle arm. Most gas engines used for R/C