Installing The Wing Control Horns; Wing Servo Wiring - GRAUPNER Tangent Alpina 4001 PRO Notice De Montage

Installing the wing control horns.

Note: ARF customers will need to remove a little of the covering material while those
building the ARC version may prefer to wait until after the wings have been covered before
bonding the control horns in place.
Ailerons: Mark out the position of the aileron control horns on the lower surface of the
aileron. The horn should be positioned directly opposite the scoop in the servo cover and
about 3 mm from the aileron leading edge.
Drill a series of 2mm diameter holes and cut away the excess to form a neat slot to
accommodate the supplied GRP control horns. Take care not to cut through to the upper
surface of the aileron and undercut a little of the material inside the slot to allow for
additional adhesive.
Locate the aileron control horn such that the eye is at 90° to the hinge line and about
12mm above the lower surface of the aileron.
Flaps: Similarly locate the slots to accommodate the supplied GRP control horns about
3mm behind the leading edge of the flap such that the eye is located about 10mm behind
the flap leading edge and about 13mm above the lower surface of the flap.
As before, drill a series of 2mm diameter holes and cut away the excess to form a neat slot
to accommodate the supplied GRP control horns. Take care not to cut through to the
upper surface of the aileron and undercut a little of the material inside the slot to allow for
additional adhesive.
Once satisfied with the position of the control horns, roughen the ends of each and bond
the GRP control horns into place using thickened epoxy and allow to cure.

Wing servo wiring.

Given the number of wing servos present, take time to consider how best to achieve the
electrical connections between the receiver in the fuselage and the wing servos. Individual
aero-modellers will no doubt have their own preferences, but we would recommend the
use of quality polarised connectors with Gold plated contacts, a combination of either D-
Type connectors, or high current (green) plugs & sockets.
Prepare the cable harnesses required to connect the wing mounted aileron and flap servos
to the receiver system in the fuselage. The connectors may be either fixed into the wing
and/or fuselage, or left on flying leads. However, it is generally recommended that at least
one side of the cable harness should be permanently mounted as this reduces wear and
tear on the cables and is more convenient when rigging the model at the flying site.
Regardless of how exactly you choose to proceed, be sure to use good quality twisted
servo leads with a wire diameter of no less than 0.25 mm ² capable of delivering adequate
current for the multiple wing servos under load. Pay careful attention to the solder
connections ensuring good mechanical and electrical joint in each case. Be sure to
insulate each joint with heat-shrink for additional security. Some may wish to apply a bead
of silicone compound to the soldered ends to avoid stress points when handling the
connectors.
Graupner GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck *
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Fig 9 – 12. Wing Control Horns
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