Completing The Tail-Plane Halves; Vertical Stabiliser And Rudder; Rudder Control Horn - GRAUPNER Tangent Alpina 4001 PRO Notice De Montage

Completing the tail-plane halves.

Work on the uncovered tail-plane panels is limited to finishing the root outline to match the
profile of the fin. The tail-plane halves are factory finished, but some may wish to achieve
an even more accurate match by carefully working the root area using a fine grade
abrasive paper.
Note: The joiner tubes installed in the tail-plane halves incorporate the integrated all
moving TA Tail-Lock mechanism.
Before fitting the joiners into the brass tubes for the first time, check that the wire joiners
are perfectly straight and burr free. When pressing the tail-plane halves into place, you will
feel a mild mechanical resistance which is sufficient to hold the tail-plane halves securely
in-place during flight.

Vertical stabiliser and rudder

The rudder supplied in the kit is complete and requires only minimal finishing. The rudder
hinge is formed by a Steel wire running in a factory installed pivot tube in the leading edge
of the rudder.
Note: Customers building the ARC version may wish to take this opportunity to adjust the
profile of the leading edge of the rudder to match the trailing edge of the fin.
Start by cleaning up the rudder push-rod shroud using a suitable (8-10mm) round file.
Similarly file a small semi-circular recess in the top of the fin to clear the leading edge of
the rudder. You may also find it necessary to generally clean-up the area around the inside
edge of fin post, to ensure that the rudder can move freely within the opening
Locate and open-up the three hinge points along the leading edge of the rudder and
carefully mark the corresponding hinge points along the centre of the rudder post. Now drill
the holes using a Ø 3.5 mm drill to accommodate three eye-bolts used to form the hinge
and screw these into the rudder post, but do not bond in place just yet. Insert the Steel
wire through the guide tube located in the leading edge of the rudder such that it passes
through the three holes in the eye-bolts – to form an effective hinge. Now carefully check
the movement and throw of the rudder with respect to the fin and adjust the depth of the
hinge, by screwing in (or out) the three eye-bolts until you find the optimum depth. Mark
the position of the eye-bolts before bonding into place using a suitably thickened epoxy,
re-install the rudder and adjust as necessary before finally allowing the hinge points to set.
Tip: It is possible to unscrew the hinge bolt and reset it with a little more adhesive should
you find it necessary to make an adjustment after the hinge bolts have been set into the fin
post.
The rudder is attached by pressing the supplied hinge rod down through the pivot tube
from the top, and engaging in each of the hinge points.

Rudder control horn

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
Graupner GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck *
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Fig 4. Rudder Hinge
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