CARF-Models Extra 330SC (3.1m)
www.carf-models.com
24
quick and easy! Once all wires are soldered to the gold-
plated pins, fit a short length of heatshrink tube over each
one. Finally protect all the connections from vibrations etc
with a nice blob of glue from a hot-glue gun. Job done.
Important Note:
Make absolutely sure that all wires and
tubes are protected where they pass through, or near to,
sharp carbon or fibreglass edges. With the vibration from the
engine in flight the composite materials can cut through
these critical items in less then 1 flight - which will cost you
your plane. You must also make sure that no important
services (wires or fuel tubes) can touch hot items, such as
the exhaust canisters. If you chose to fit full-length tuned
pipes then good ‘wire management’ is even more important
and you should secure all wires as far away from the pipes
as possible. We advise you to protect all these items with
plastic ‘spiral-wrap’ (or equivalent), and make sure that all
wires and tubes are firmly fixed to the sides of the fuselage
with cable-ties or similar.
Final check
Now check that you have fixed all components securely.
Keep in mind that all the components inside the aircraft are
loaded with the same G’s as the wing and the wing spar
during aerobatic manoeuvres. Check engine, cowling, wing
and stab mounts carefully again.
Are all extension leads, cables and fuel tubes securely fixed
to the side of the fuselage and cannot come loose when
subjected to high ‘G’ forces during flight. Are all tubes and
wires protected from chafing where they pass thru’ the holes
in fibreglass parts or bulkheads with rubber grommets, or
short lengths of split silicone tubing?
Make sure that no fuel tubing or wires can come into contact
the exhausts or manifolds. Use the plastic spiral-wrap to tidy
up groups of cables and make sure that they cannot move
around in the plane under high ’G’ manoeuvres by fixing
them to the sides with small cable ties. If using the easily-
available cable-tie plastic fixing plates, please do not trust
the double-sided tape that they usually have on them which
can fail under vibrations. Peel it off, rough up the back face
with coarse sandpaper and glue them to the fuselage sides
with 30minute epoxy.
Did you fit small Tygon or silicone tube pieces over
all the steel quick-links?
Did you tighten the M3 locknuts against all the ball-
links and clevises?
Are the swages crimped up nice and tight on the
rudder cables?
It is very important to protect
all tubes & wires where they
pass thru’ fiberglass or carbon
parts, or near to composite
milled parts, where they could
be damaged due to vibrations.
Use grommets or split silicone
tube around the edges of holes
in composite material, and
plastic spiral-wrap.
Nice shot of our 3.1m Extra SC
together with our 2.3m Extra
SC
