security (see photo below)
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 maneouvres. 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 grom-
mets, or short lengths of split silicone tubing?
Especially if you have installed the internal mini-pipe set-
up, you also must make sure that no fuel tubing or wires
can come into contact the exhausts. 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’ manouevres 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 fuse-
lage sides with 30minute epoxy.
-
Did you fit small Tygon or silicone tube pieces over all the quick-links?
-
Did you tighten the M3 locknuts against all the quicklinks and clevises?
-
Are the swages crimped up nice and tight on the rudder cables?
-
Add one small drop of loctite/thread locking compound on all the bolts that hold the servo
arms to the servos, especially important with digital types, as the occasional ‘buzzing’ you
hear is actually high-frequency vibration which, over some time, can cause the servo arm
securing bolts to work loose. We have seen this happen several times - so you can treat
it as a fact !
Then you can go on set up all the link-
ages, control throws and R/C system as
described below.
The assembly of the model should be
completed in about 22 - 24 hours.
Composite-ARF SuperXtra 330L
(3.1m span)
32
Another general view showing the
Powerbox and receiver installation.
Also visible are the 2 slots in the
bottom of the fuselage for warm air
to exit from the mini-pipes.
