GRAUPNER alpina 400i elektro 61797, Руководство пользователя

Страница: 29 / 60

Graupner
GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck
*
www.graupner.de
Stand: 2010
23
Fuselage wing mount
The ALPINA 4001 Elektro 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.
Fig 6 & 7. The wing Mount
Installation of the 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!
The Multilock connectors.
The supplied Nylon wing locks are used to secure
the wing joints. The sockets have already been
installed in the fuselage wing root. The matching
plugs are required to be glued into the wing roots
to complete the joint.
First check the plugs fit the holes provided in the
wing roots and adjust if necessary. Once the holes
have been adequately prepared, glue the plugs into
the wing roots and with the steel wing joiner
installed, engage the wings firmly with the mating
sockets and ensure correct alignment.
Take due care when completing this step to avoid
the effects of any excess epoxy. We recommend
that you first cover the fuselage wing roots with
kitchen film (or similar material) to protect the
fuselage, and apply a releasing agent to the locks
themselves while the epoxy cures. Once cured, the
wing locks are easily separated by applying firm
pressure, by hand, along the leading edge of the
wing – as shown in Fig 9.
Note:
ARC customers – complete this step only
after the wing panels have been covered – see
finishing.
Preparing the wing servo mountings
The TA Servo LOCK system supplied with your
ALPINA 4001 Elektro kit provides a universal
wing servo mounting mechanism which is both
simple to install and very secure.
Glue the plywood servo frames into the factory
prepared servo wells. Note that In the case of the
ARF version, the plywood servo frames are pre-
installed at the factory. Temporarily install the
servo covers using the screws provided and
carefully mark the position of the exit scoops.
Extend these to each of the control surfaces and
mark the position of the relevant control horns –
ensuring that the position of each control horn is at
90° to the servo arms.