Graupner
GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck
*
www.graupner.de
Stand: 2010
22
Note:
Be sure to make provision for adequate
air-intake to cool the drive system. Some
customers may prefer to use a so called
Turbo-Spinner which provides for intake of
air through the spinner itself, but do make
sure that adequate cooling is provided.
Only when the motor-mount is fully secure, re-
install the motor (remember to use lock washers)
and ensure that the drive shaft turns feely and there
is adequate clearances for the propeller yoke and
spinner assembly. A gap of about 1mm between
the spinner and the fuselage nose is recommended.
For the sake of safety, don’t install the propeller
until the model is complete!
Note
: Check that the screws used to secure
the motor to the motor mount are not too
long as they may otherwise foul the internal
motor mechanism. You may find it necessary
to countersink the mounting screws slightly,
to achieve clearance with the propeller
yoke/spinner assembly.
Servo mounting tray
The positioning of the components installed in the
nose of the fuselage will depend to some degree on
your choice of motor, speed controller; flight-pack
and receiver battery and all of these will influence
the balance point. Carefully check the physical
layout of all the components, of the electric drive
system bearing in mind the recommended centre
of gravity.
The servo mounting tray is to be located within the
cockpit opening with the trailing edge about 230
mm from the nose.
Note:
The servo mounting tray does fit in the
fuselage opening! Turn it around carefully and you
will find that it will slip neatly into place. Don’t be
tempted to apply force, or to remove too much
material which will result in a poor fit.
Mark the position carefully with a pencil. Now
remove the two protective strips from the inside of
the fuselage opening and tack the servo tray in
place using an instant adhesive – before bonding
the frame securely into the fuselage with a
generous bead of thickened epoxy. Allow to cure.
Tip:
Some may wish to complete the job by
adding a layer of wetted fibre glass cloth over the
entire servo frame allowing about 10mm extra on
both sides to bond with the fuselage sides.
Fig 4. Servo Mounting Tray / Battery Mount
Installation of the flight battery mount.
The position of the flight battery within the
fuselage will significantly influence the balance
point. Make sure that you can achieve the
recommended centre of gravity with the flight
pack installed.
Start with the front edge of the battery mount
about 100mm from the nose. Fix the battery mount
to the bottom of the fuselage using suitably
thickened epoxy resin.
The flight battery itself is secured using good
quality Velcro tape (Battery Band #YZC.105). Use
one piece of each (hook & loop) under the battery
to secure it fore and aft and other in the form of a
strap to secure it firmly to the battery mount.
Note
: Ensure that the flight pack is both
adequately secured and readily accessible for
installation and removal at the flying site.
Fig 5 A, B & C . RC Installation/Motor Mount
Preparing the fuselage push-rods.
Temporarily install the rudder and elevator servos
in the cut-outs in the servo mounting frame
according to the instructions supplied with the
servos. Cut the control linkages to length and
solder clevis adaptors securely to the wire ends
having first thoroughly cleaned and prepared the
joint. Fit clevises and lock-nuts and adjust
accordingly such that the control surfaces are held
at neutral when the servo positions are centred.
Finally secure the Bowden cables to the inside of
the fuselage side using the supplied slotted
hardwood blocks and a little suitably thickened
epoxy to ensure smooth running and slop free
control linkages always keeping mind to minimise
the length of unsupported control linkages.
Wings
Wing Joiner
The wing joiner consists of a single Ø 12 mm
hardened steel joiner which is ample to carry the
flight loads.
