Composite-ARF Extra 300L
(2.12m/84”)
4
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 in the
first flight, can be an enormous danger for you
and all spectators. 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 absolute-
ly 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 con-
tact 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, and any excess vibrations can affect
the servos and linkages.
Fully-composite aircraft structure
All the parts are produced in negative molds, manufactured using vacuum-bagged sandwich
construction technology. All parts are painted in the molds, either single color or designer
schemes. A production method called TAVS (Total Area Vacuum Sandwich), enables us to pres-
ent this aircraft with incredible built-in strength, while still being lightweight, and for a price that
nobody could even consider some years ago. This production process has huge advantages, but
a few disadvantages also. These facts need to be explained in advance for your understanding.
Description of Parts
The Wings:
Both wing halves are made in negative moulds, and fully
vacuum bagged, using only 2 layers of 2 oz. cloth in com-
bination with a very hard 2 mm foam sandwich to form a
hard and durable outer skin.
The ailerons are hinged already for you - laminated in the
mould and attached to the wing with a special nylon hinge-
NO !!!
Secure the plane
before starting
the engine.
DANGER ZONES
NO
NO
