Multiplex Alpina 4001 ELEKTRO Notice De Construction page 16

RC functions
Ailerons
min.
Elevator
Rudder
Camber-changing flaps
min.
Optional airbrakes
Brushless controller
*for mechanical reasons only
Receiving system components
We recommend Micro digi servos, MPX Order No. 6 5378,
for the ailerons and camber-changing flaps of the Alpina
4001 ELEKTRO.
For the optional airbrakes two additional Micro digi servos
are required, although in this case lower-cost servos are
adequate, e.g. MULTIPLEX Cockpit digi, Order No. 6 5385;
in this case the installation frame will need to be slightly
modified.
The servo plate is designed to accommodate two MICRO
digi servos, Order No. 6 5378 (elevator and rudder), and
the On/Off switch.
It is important that the receiver battery should be of
generous capacity to cope with the model's receiving
system, bearing in mind that you will be using 6 servos. We
recommend at least a 4-cell 1500 mAh NiMH pack: Order
No. 15 6007. If you want a little "more", then by all means
increase the capacity, but you must not add an extra cell.
The servo plate opening is designed to take a switch
harness with integral charge socket, MPX Order No. 8
5039. Two extension leads, MPX Order No. 8 5111 and
MPX Order No. 8 5031, are also required.
There is plenty of space in the fuselage for the receiver on
the rear part of the battery tray.
For the electrical connection between the wing-mounted
aileron and airbrake servos and the receiver we
recommend three Cable Sets 2, MPX Order No. 8 5253.
Important note
For all joints involving the styrofoam wing cores it is
essential that you do not use solvent-based adhesives,
and in particular avoid instant or cyano-acrylate glue
(cyano, or CA). These materials will melt and destroy a
large volume of foam, and the component will be
completely ruined. Use solvent-free adhesives such as
5-minute epoxy or white glue.
Notes on using epoxy laminating resin
Epoxy laminating resin is not a proper adhesive as it
stands. However, you can make a variety of excellent
adhesives by mixing additives into it; by careful choice of
filler you can match the characteristics of the adhesive to
the requirements of the moment.
16
2 servos
15 Ncm
1 servo
*30 Ncm
1 servo
*30 Ncm
2 servos
15 Ncm
2 servos
15 Ncm
1. Chopped cotton fibres, Order No. 60 2738, produce a
tough but flexible joint.
2. Superfine glassfibres, Order No. 60 2784, produce a
rock-hard joint which is easy to sand.
3. Micro-balloons, Order No. 60 2779/80, convert the resin
into a lightweight filler paste.
4. The special thixotropic agent, Order No. 60 2782, makes
all the adhesives and fillers listed above thixotropic, i.e.
prevents them running off a vertical surface.
The Alpina 4001 ELEKTRO
The kit you have just purchased includes every item you
need to complete the basic airframe, including linkage
hardware, but does not include adhesives.
A few words on the history of the Alpina 4001 ELEKTRO:
The Alpina was first introduced in the early 1980's, since
which time its outstanding flying characteristics have
made it a familiar and popular model amongst the gliding
fraternity both in Germany and abroad. The design has
been flown in dozens of competitions, and has indeed
won many of them. In the early 90's the Alpina Magic was
added to the line, its main innovation being variable
wingspan.
The model's large size makes it easy to see in the air, and
this allows the pilot to fly safely over a very wide radius. In
practice this means that the area over which the pilot can
seek thermal assistance is much larger than with smaller
models. Its low minimum sink rate and outstanding circling
characteristics (for thermal flying) even give the Alpina
4001 a good chance of holding its own against specialised
lightweight soarers in light-wind conditions.
The model's broad speed range makes it easy to cross
large areas of poor air quickly and easily, and you do not
need to fear turbulent conditions and stormy weather.
The Alpina 4001 is so manoeuvrable that you could be
forgiven for thinking it was a much smaller model. As a
result this glider can be flown from quite small slopes and
offers exciting potential for aerobatics.
Many modellers have also expressed a wish for an electric
version of the Alpina 4001. Quite a number of Alpinas have
been converted by individual modellers, and Multiplex staff
members have also had excellent experience with their
own conversions. This made us confident about producing
the
Alpina 4001 ELEKTRO.
With our conversion the all-up weight of the Alpina 4001
ELEKTRO is no higher than that of the "standard" glider
version. This guarantees the same superb flying
characteristics as the pure soarer.
If you intend flying the Alpina 4001 primarily from a flat field
site you can safely manage without airbrakes, as the
proven butterfly ("crow") landing system provides accurate
spot landing capability when set up correctly.
If you wish to install airbrakes anyway, we recommend
fitting 370 mm Contest airbrakes, MPX Order No. 72 2646.
It is possible to install airbrakes even in a finished model,
and the kit includes full fitting instructions together with the
wooden parts required.