The Wings; Wing Joiners; Wing Mount; Wing Incidence Pins - GRAUPNER Alpina5001 PRO Mode D'emploi

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 tubes 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.

The Wings

The Alpina 5001 incorporates a 4 part wing comprised of two centre panels and two tip
panels.

Wing Joiners

The main wing joiner consists of a single Ø 16 mm hardened steel joiner while the tip panels
each incorporate Ø 10 mm Steel joiners which are ample to carry the flight loads.

Wing mount

The Alpina 5001 features a floating wing joiner; the opening is the fuselage is approx. 1.5
mm larger than the diameter of the wing joiner. This system is widely used in full-size aircraft
and has been well proven over many years of model design and manufacture.
The fuselage is suspended between the inner wing panels on four Steel incidence pins. Work
carefully when drilling the holes in the wing roots as these determine the wing incidence.
Using small screw-clamps, carefully fix small 3mm thick pieces of scrap Balsa to the top and
bottom surfaces of the wing at both leading and trailing edges. The upper pieces should be
positioned to overhang the wing root by a few millimetres - to act as guides along the
fuselage wing fairing.
Position one wing panel carefully against the fuselage fairing at the leading and trailing edge,
using the small Balsa pieces as guides, and tape it firmly in place. Now mark the position of
the holes for incidence pins on the wing root by working through the holes in the opposite
side of the fuselage using a sharpened 3mm steel rod (or similar tool). Remove the wing and
drill the holes in the wing root using a 3mm twist drill. Remember to take account of the wing
dihedral; the holes should be drilled parallel to the wing joiner.

Wing incidence pins

Start by preparing the four Steel incidence pins. They should be thoroughly de-greased using
alcohol and the surfaces to be bonded must be prepared with abrasive paper to ensure a
good bond. The pins should protrude about 12 – 15mm from the wing roots. Be sure to make
one pin in each wing a little longer than the other, and round off the end of the pins to
facilitate easier assembly at the flying field.
Once both wings have been marked and drilled, carefully check the alignment before
bonding the incidence pins into place. Apply a suitable release agent to the holes in the
fuselage fairing before applying a suitably thickened epoxy. Then fit the wings to the
fuselage, with the steel joiner installed to allow the epoxy to cure overnight.
Tip: Use a layer of kitchen film between the wing/fuselage joint to avoid any excess epoxy
from forming a permanent joint!
Graupner GmbH & Co. KG, Henriettenstraße 94-96, 73230 Kirchheim
33
Fig 9 & 10. The wing Mount
www.graupner.de * www.tangent-modelltechnik.com