GRAUPNER GmbH & Co. KG * Henriettenstrasse 94-96 * 73230 Kirchheim/Teck
www.graupner.de
*
www.tangent-modelltechnik.com
8
Rudder control horn
Note:
Customers building the ARF version will need to carefully remove a little of the
covering in the area of the rudder control horn.
Those building the ARC version may prefer to complete this step once the rudder has
been covered.
Carefully mark out the position of the rudder control horn to align with the shroud in the rear
of the fuselage and the rudder control linkage. Try to locate the horn as close as possible to
the pivot line, and at exactly 90 degrees to the rudder hinge line. Take care to avoid any
restriction caused by the rudder horn touching the shroud in the fuselage. Now drill a 4 mm
hole at the point where the rudder horn is to be installed. The hole should be as deep as
possible but take care not to pierce the skin on the other side of the rudder. Undermine the
hole using a sharp tool so as to increase area available to the adhesive and bond the rudder
horn into place using suitably
thickened epoxy.
Wing Saddle
Roughen the inside of the fuselage opening in the area of the wing-saddle with 80 grit
abrasive paper to achieve a good bond. Insert the ply-wood reinforcing piece and carefully
centre in the opening before bonding in place with suitably thickened epoxy resin – as
shown.
Fig 04. Wing Saddle Reinforcement
Motor installation
Prepare the area where the motor mount is to be bonded to the inside of the fuselage nose
with a course abrasive paper (80 Grit) to ensure a good bond. The motor mount should be
installed about 1mm behind the edge of the fuselage nose. Note that the appropriate down-
thrust and side-thrust is accounted for by the fuselage itself.
Tip:
Fit a long nylon bolt through the centre hole in the motor mount and use the
protruding part of the bolt as an aid to adjusting the precise position of the motor
mount in the nose.
With the motor temporally installed, fit the propeller yoke and spinner and check the
alignment of the fuselage nose with the spinner. Carefully finish the front of the fuselage
nose to match the profile of your chosen spinner.
Now carefully position the motor mount in place and secure with a few drops of instant
adhesive before finally bonding in place with a generous bead of suitably thickened epoxy to
both sides of the motor mount.
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!
