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Composite-ARF SuperXtra 330L (3.1m span)
would not work properly. So, make sure that the lip is not damaged, and that the aileron slides
under this lip perfectly. It will NOT lock at any time, as long as the lip is not damaged. If damage
occurs to the lip, you can cut off 2-3 mm, but you should NEVER need to cut off more than this.
The wings are already set-up for 2 servos per aileron, and designed specifically around a pair of
JR/Graupner 8511/8611 servos which fit into a CNC-milled phenolic plate. For normal pattern
style flying, a pair of JR8411, or equivalent, servos should be sufficient, but we highly recom-
mend that you use the suggested 8511/8611servos.
The wings are attached to the fuselage with the 4 threaded aluminium dowel anti-rotation pins,
with big 4 plastic nuts inside the fuselage. If the aluminium dowels come loose in the wing, the
wing will slide outwards, away from the fuselage, and the main spar tube will definitely break. So
take great care to inspect the glue joints of these anti-rotation dowels in the wing REGULARLY.
Excessive vibrations or hard shocks can cause the glue joints to weaken or break. Monitor these
joints whenever you set up your plane. Never forget to tighten the nuts inside the fuselage. Your
flight will end after 100 ft and you will have to fix a hole in your club's runway. Please DO NOT
modify these attachment dowels in any way, their perfect function is proven for many years.
The Fuselage:
The fuselage is also made in negative moulds, and (except for the bottom surface) it is also all
constructed using TAVS technology, with the diagon-technique carbon strengthening for
improved torsional stability. All the loadbearing internal parts are glued in during manufacture, to
ensure accurate location and reduce the assembly time for you. The fibreglass tubes in the wings
and fuselage to receive the wing tube spar, the stab spar tubes, and the holes and reinforcement
plates for the anti-rotation dowels, are already installed.
The landing gear mount is strong and does-
n't need any extra reinforcement. You have
an extremely light weight fuselage, and the
gear loads need to be led into the structure
gently. No glue joint needs to be stronger
than the materials that it is attached to, as it
would just result in increased weight for no
advantage. The landing gear is a fairly flexi-
ble design, which works very much like
shock absorbers. This plane is not made for
crashing, but the landing gear will take some
hard landings without problems. Do not
change or modify it, as the results would only
be negative. We had plenty of time and experi-
ence to engineer the strength needed in this
area - and we did !
The motordome and firewall are pre-installed, and provide plenty of strength for any engines up
to 150cc on the market today. See the Engine Installation section for details of engine and set-
ting thrust angles.
The engine cowling should be attached using the method shown. It is only a little work and this
mounting has been tested and proven for many years.
techsupport@composite-arf.com
(above) The fuselage is manufactured using the
'Diagon-technique' with carbon tows to give
exceptional torsional stiffness combined with
extremely low weight.
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