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Composite-ARF Extra 300L (2.12m/84")
Important Supplementary Notes
Pre-Assembly Checks:
At Composite-ARF we take every possible precaution to make sure that all our products are
carefully checked before they leave the factory - but of course it is always possible that human
error creeps in occasionally with high-volume production, and that an important part has been
incorrectly installed or glued into position.
Therefore we strongly recommend that you double-check the following critical structural com-
ponents before starting the assembly of your aircraft - and also regularly before every flying ses-
sion as a hard landing, shock loads during transport, or vibrations from unbalanced propellers,
etc., could all damage the glue joints to these critical components that ensure the structural
integrity of your plane, and the safety of people nearby.
1)
Check that the plastic wing bolts, and the front and back fibreglass rod anti-rotation dow
els, are securely glued into the wing root ribs. Check that the fibreglass rod anti-rotation
pins are securely glued into the front of the stabiliser root ribs.
2)
Check that the fibreglass sleeves for the wing and stab spar tubes are securely glued into
the fuselage.
3)
Check that the alloy wing tube and carbon stab tubes are the correct lengths, as shown in
the hardware list at the end of these instructions, not bent or damaged at all, and that they
fit into the sleeves in the fuselage and wings/stabs without too much 'slop'.
4)
Check that the plywood landing gear support plates are securely glued into the bottom of
the fuselage, and reinforced with a layer of fibreglass cloth and epoxy resin.
If you see any of these important joints that don't seem to have enough glue on them, then light-
ly sand the area with 120 grit sandpaper, clean the area carefully with Acetone (or denatured
alcohol or similar) on a paper towel, and apply some 30 minute or laminating epoxy and micro-
balloons mixture when you are mixing it for use in another part of the normal assembly.
Pre-Flight Checks:
Before every session check that all the model's systems function correctly, and be sure to carry
out a range check. The first time you fly any new model aircraft we strongly recommend that you
enlist the help of an experienced modeller to help you check the model and offer advice while
you are flying. Be certain to use the recommended CG position and control surface travels. If
adjustments are required, carry them out before operating the model. Be aware of any instruc-
tions and warnings of other manufacturers, whose product(s) you use to fly this aircraft.
Make sure that your wing and stab spar tubes are not damaged. Check that the anti-rotation pins
for the wings and stabiliser are not loose. Check that the plastic wing retaining nuts are tight, that
the M3 bolts retaining the horizontal stabilisers onto the carbon tube are tight, and that the rud-
der hinge wire cannot come out with a piece of clear tape.
Please don't ignore our warnings, or those provided by other manufacturers. They refer to things
and processes which, if ignored, could result in permanent damage or fatal injury
Attention !
This IMAC-Aircraft is a high-end product and can create an enormous risk for both pilot and
spectators, if not handled with care, and used according to the instructions. Make sure that you
operate your Extra according to the AMA rules, or those laws and regulations governing model
techsupport@composite-arf.com
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