Graupner
GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck
*
www.graupner.de
Stand: 2010
26
Radio Control Equipment Installation.
Fuselage servo installation
Install the rudder & elevator servos in the cut-outs
in the servo mounting frame according to the
instructions supplied with the servos. Fit clevises
and lock-nuts and adjust accordingly such that the
control surfaces are held at neutral when the servo
positions are centred and make maximum use of
the servo throw. Check the operation to ensure
smooth running and slop free control linkages
always keeping mind to minimise the length of
unsupported control linkages.
Wing servo installation
The servos themselves are simply bonded to the
inside of the servo cover scoop using suitably
thickened epoxy and screwed onto the plywood
frames (see also the installation note supplied with
the TA servo LOCK set). Be sure to roughen the
surface of the servo cover to ensure a good bond.
Tip:
Protect the servos with heat shrink
sleeve. This makes for easy removal and
replacement of the servo, but care should be
taken so as not to overheat the servos while
applying the sleeve.
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 itself is best installed on the servo
mounting tray and to the rear of the servos; 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 the
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 100mm behind the
root wing leading edge – this has been found to be
ideal in test flights. 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
about +1°. This is the angle of the elevator (at the
neutral position) with respect to the wing and is
best measured with the aid of 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.
