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Wing servo installation - Ensure that the servo output arms are set at 90° with the
servo electrically centred. Prepare the linkages, using threaded rod, clevises and
lock-nuts remembering to apply a drop of thread-lock to the lock nuts or apply a short
length of heat-shrink over the joint.
Secure the servo covers in place using the four small screws provided. Use a
countersink tool to recess the screw heads into the servo covers to improve both the
appearance and the aerodynamic performance.
Receiver installation - The receiver is best installed to the rear of the fuselage
cockpit opening, a good quality Velcro Hook & Loop material is quite adequate for
this purpose. The receiver antenna is ideally inserted into a suitable antenna tube (or
plastic Bowden cable carrier) and inserted down the length of the fuselage
Although there is a certain amount of Carbon used in the construction of the
fuselage, we would suggest that there is no problem running the antenna down the
inside of the fuselage boom (we fly all our models this way). However, ALWAYS
carry out a thorough range test before flying the model and if any doubt whatsoever
then allow the antenna to hang freely.
Tip: Never install the antenna taut, but allow some slack in the wire to allow for
small movements within the fuselage.
The model is now largely complete, but some very important work remains to be
done while still in the workshop.
Balancing & Adjusting.
The correct centre of gravity and longitudinal dihedral are first determined
theoretically, and then confirmed in practice by test flying model.
A successful first test flight is invariably a matter of good preparation!
Centre of gravity and longitudinal dihedral.
Start with the centre of gravity between 60 and 65 mm behind the root wing leading
edge – this has been found to be ideal in test flights. You ought to be able to achieve
the required balance point by careful location of the flight battery. Be sure all
batteries are secure as any movement whilst in flight will impact the correct centre of
gravity and adversely affect the proper flying characteristics of the model.
The correct longitudinal dihedral (decelage) is +1.3° . This is the angle of the elevator
(at the neutral position) with respect to the wing and is best measured using an
incidence meter.
Recommended control throws.
The following recommended control throws have been determined following several
test flights, confirmed by several different model pilots. We strongly recommend that
you begin with the recommended throws and only change them with experience.
Graupner GmbH & Co. KG * Henriettenstraße 94-96 * D- 73230 Kirchheim/Teck *
14
www.graupner.de
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