Fit the correct stopper to the fuel tank for the fuel
type used. (If using Dubro tank the gasoline
stopper has a small ‘O’ moulded in the top of it).
We use the excellent ‘Tygon’ brand of fuel tubing
for all our models. It is totally gasoline and
kerosene-proof, and does not go hard and crack
with age.
Secure the feed tube inside the tank to the clunk
with a small cable tie. If the tube is even a little
loose on the brass tubes though the stopper it
will come off at just the wrong moment and your
engine will quit. So solder some small rings onto
both ends of the brass tubing (easily made from
the soft wire of a paperclip wrapped around a
small screwdriver) and secure with a fuel-line
clamp or cable-tie. Don’t miss this small detail -
it could cost you your plane !
We use the normal 3-tube plumbing system, one
from the clunk to feed the motor, one out of the
bottom of the plane (vent/overflow - leave open)
and one at the top for filling (close for flight).
Throttle servo
Included in the kit is a CNC milled plywood throt-
tle servo mount, and you can fit this in any suit-
able position for your motor set-up. However, we
strongly advise you
not
to mount it directly on
the back of the firewall as engine vibrations can
damage a servo quite quickly. We mounted it on
top of the exhaust tunnel, directly in front of the
fuel tank base - and glued securely to the rear of
the landing gear mount as shown here. Included
in the hardware are two M3 clevises and the M3
threaded rod to make up the linkage from the
servo to the carburettor.
R/C & Gear Installation
Everyone has their own favourite methods for fit-
ting the R/C and gear, but the installation tech-
niques shown here can be used as a guide and
they have worked perfectly in all of our planes
flown by C-ARF factory staff, and many of our
reps and customers. The advice below applies
to whatever engine type you chose to fit; gas,
glow or electric.
With a plane of this size it is important to keep
everything lightweight to ensure the best per-
Composite-ARF Yak 55
(2.1m/83”)
27
