Advertisement
Composite-ARF Yak 55 (2.1m/83")
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 retaining bolts, and the front and back fibreglass rod anti-
rotation dowels, 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 'play'.
4)
Check that the plywood landing gear support plates are securely glued to the top of the
muffler tunnel and sides of the fuselage.
Pre-Flight Checks:
Before every session check that all the model's working 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 keep to the recommended CG position & control surface trav-
els. If adjustments are required, carry them out before operating the model. Be aware of any
instructions & 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 & can create an enormous risk for both pilot and spec-
tators, if not handled with care, and used according to the instructions. Make sure that you oper-
ate your Yak according to the laws and regulations governing model flying in the country of use.
The engine, servos and control surfaces have to be attached properly. Please use only the
recommended engines, servos, propellers, and accessories. Make sure that the 'Centre of
Gravity' is located in the recommended place. Use the nose heavy end of the CG range for your
first flights. A tail heavy plane, especially during the first flight, can be an enormous danger for
you and all spectators. Fix all heavy items, like batteries, very securely into the plane.
techsupport@composite-arf.com
3
Advertisement
