Graupner
GmbH & Co. KG * Henriettenstraße 94-96 * D - 73230 Kirchheim/Teck
*
www.graupner.de
Stand: 2010
19
flights we would further recommend a redundant
receiver power supply, with battery backer and an
electronic monitoring system.
For the electric drive system we recommend a
proven
combination
as
follows:
Motor:
Compact 555 18.5 V (Grp # 7726)
Spinner:
Precision Spinner (Grp # 6060.6)
Propeller: C.F.P.
(Grp # 1336.40.25)
Speed Controller: 70A Brushless (Grp # 7237)
Flight Battery: LiPo 4 /4400 (Grp # 7663.4)
Note regarding Styrofoam wing cores
.
For all joints involving Styrofoam wing cores it is
essential that you do not use any solvent based
adhesives, and in particular avoid use of any form
of cyano-acrylate glue. Use of such adhesives will
destroy the foam and render the affected parts
useless. Use only solvent-free adhesives, such as
Epoxy resin and/or Aliphatic Resin (white wood
glue) if working anywhere near exposed areas of
Styrofoam.
Note regarding the use of Epoxy Resin.
Epoxy alone is not a viable adhesive! However,
the addition of appropriate additives makes for a
variety of excellent adhesives. Match the choice
of additive to the job at hand:
•
Chopped cotton fibres – produces a tough but
flexible joint.
•
Superfine glass fibres - makes a hard joint.
•
Micro-balloons – produces a highly effective,
lightweight filler
Assembling your ALPINA 4001 Elektro.
The kit you have purchased includes all the parts
required to complete the basic airframe (ARC) and
covering (ARF), but does not include adhesives or
radio control components. You can make a
significant contribution towards the ultimate
appearance and performance of your model by
building carefully and accurately. It is a well
known fact that a poorly built model does not fly
well and may be difficult to control. A well built
and properly trimmed model will reward the pilot
and spectators with good performance and
accurate handling characteristics. Be patient, take
your time; the effort will be well worth while!
Tip.
Take time to read through these
instructions
in
their
entirety
before
commencing the assembly as this will
provide you with a better insight of all the
individual steps and how they might affect
one another.
The Fuselage.
Begin the construction with the Fuselage as this is
the point of reference for all other parts.
Fuselage Openings
Open out all of the openings in the fuselage in the
area of the wing fairing and the tail-plane. Use a 3
mm dia. drill to make a series of small adjacent
holes to prepare the openings as indicated by the
markings in the mould. Finish the openings using a
small file.
Tip:
Use a needle file or suitable rotary tool
to finish the job.
Compression Struts
The two hardwood compression struts are
necessary to help to protect the fuselage from
damage in the event of a hard landing. Carefully
adjust the two hardwood pieces to fit the inside
width of the fuselage, one just forward of the
leading edge incidence pins and the second just aft
of the trailing edge incidence pins. It is important
that these struts fit snugly, without distorting the
shape of the fuselage in any way. They are bonded
into place using suitably thickened epoxy resin.
Completing the canopy.
The Carbon canopy is supplied ready made and
requires only minimal finishing. Place the canopy
on the fuselage opening, carefully check the joint
and adjust as necessary for a perfect fit. Minimum
gap and good overall appearance will be your just
reward for a little extra time and effort at this
stage. Follow the steps below to install the canopy
retainer, taking care to check the fit at each stage.
