Composite-ARF BAE Hawk Instruction Manual page 3

B.A.E. HAWK www.carf-models.com
Attention !
This 'jet' aircraft is a high-end product and can create an enormous risk for both pilot and spectators,
if not handled with care & used according to the instructions. Make sure that you operate your 'Hawk'
according to the laws and regulations governing model flying in the country of use. The engine, landing
gear, servos, linkages and control surfaces have to be attached properly. Please use only the
recommended servos 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
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 the engine.
Have a helper hold your plane from the nose before you start the engine. Make sure that all spectators
are far 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 the engine, run at about half throttle
and repeat this range check. Make sure that there is no range reduction before 'fail-safe' occurs. If the
range with engine running is less then with the engine off, please DON'T FLY at that time. Check that the
wing and stab retaining bolts are tight, and that all linkages are secured. 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.
Important/General Notes
Elastic Hinges:
The ailerons, elevator, flaps and rudder are all hinged for you. The ailerons and flaps are laminated in the
mould and attached with a special nylon hinge-cloth, sandwiched between the outer skin and the foam.
This nylon hinge is 100% safe and durable. You will never have to worry about breaking it, or wearing it
out. There is no gap at all on the top side of the surface, and there is a very narrow slot in the bottom
surface, where the control surface slides under the skin during 'down' throw. This means that the hinge
axis line is on the top surface of the wing and stab, not in the centre. This is NOT a disadvantage, but you
need to program in about 10% NEGATIVE differential in your transmitter. This means that the 'down'
throw needs to be about 10% more than the 'up' throw. Why? Because the axis of the hinge is not at the
centreline of the aileron/elevator, so it moves slightly in and out when operated, and the control surface
gets a little "smaller" in surface area when moving downwards. The slot needs some explanation, too. The
cut line is exactly in the correct position so that the control surface slides under the wing skin smoothly. If
the cut was a few mm forward or backwards, it would not work properly. So, make sure that the lip is not
damaged, and that the control surface slides under this lip perfectly. It will not lock at any time, as long as
the lip is not damaged. If damage occurs, you can cut a maximum of 2-3 mm off the lip on the wing in
front of the control surface, but you should never cut off more than this.The rudder is hinged with a metal
rod passing through factory fitted hinge plates. The all flying elevator hinges on a large carbon plate
fitted with ball-races, which pivots on a carbon tube that requires locking in position.
Servo Choice:
We strongly advise that you use the recommended servos and equipment listed in the manual.
Servo Screws:
Fix the all the servos into the milled plywood servo mounts using the 2.9 Ø x13mm or 16mm sheet metal
screws provided in the kit, not the standard screws normally supplied with servos by the servo manufac-
turer. This is because all the holes in our milled servo mounts are 2mm diameter, due to our CNC manu-
facturing process, and this is too big for the normal screws
Building Sequence:
The actual building sequence is your choice, but it is definitely most efficient to start at the back of the
fuselage and work forwards, in the same order as shown below.
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