He should be capable of detecting potential weak points and errors. Be certain to keep to the
recommended CG position and control surface travels. If adjustments are required, carry them
out before operating the model. Be aware of any instructions and warnings of other manufactur-
ers, whose product(s) you use to fly this particular aircraft, especially engines & R/C equipment.
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
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, in a first flight, can be an enormous danger for you and all spec-
tators. Fix any weights, and heavy items like batteries, very securely into the plane.
Make sure that the plane is secured properly
when you start up the engine. Have a helper hold
your plane from the tail end or from behind the
wing tips before you start the engine. Make sure
that all spectators are behind, or far in front, of the
aircraft when running up the engine.
Make sure that you range check your R/C system
thoroughly before the 1st flight. It is absolutely
necessary to range check your complete R/C
installation first WITHOUT the engine running.
Leave the transmitter antenna retracted, and
check the distance you can walk before ‘fail-safe’
occurs. Then start up the engine, run it at about
half throttle and repeat this range check with the engine running. Make sure that there is no
range reduction before ‘fail-safe’ occurs. Only then make the 1st flight. If the range with engine
running is less then with the engine off, please contact the radio supplier/engine manufacturer
and DON’T FLY at that time.
Check for vibrations through the whole throttle range. The engine should run smoothly with no
unusual vibration. If you think that there are any excessive vibrations at any engine rpm’s, DON’T
FLY at this time and check your engine, spinner and propeller for proper balancing. The light-
weight sandwich composite parts don’t like too much vibration and they can suffer damage. The
low mass of all the parts results in a low physical inertia, so that any excess vibrations can affect
the servos and linkages.
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 stablisers onto the carbon tube are tight, and that the rud-
der hinge wire cannot come out with a piece of clear tape.
Composite-ARF Extra 330L
(2 x 2m)
3
NO !!!
Secure the plane
before starting
the engine.
DANGER ZONES
NO
NO
