GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler! Ident-Nr. 0057999
Made in Thailand
04/2003
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Building and operating the Harpoon calls for a high level of technical skill and knowledge, and the model should
only be flown by an extremely competent model pilot. The model is highly pre-fabricated, but the work which
you have to carry out is crucial, and must be completed with the greatest care. The model will only be strong and
fly well if you complete your tasks competently - so please work slowly and accurately.
Essential accessories (not included in the kit):
Radio control system
: you will need at least a 7-channel RC system, i.e. 7 separate functions. We particularly
recommend mc-20, mc-22, mc-24 and mx-22 computer systems.
Foam rubber
for packing and protecting various internal components.
Adhesives, thread-lock fluid
, e.g. UHU thread-lock fluid, Order No. 952.
Thread-lock fluid is used on screwed joints to prevent them shaking loose, and should be applied to all screw-
fitting linkage components. Don’t use it where screws are fitted into plastic parts, e.g. control surface horns. You
will also need epoxy laminating resin, 5-minute epoxy and cyano (thick and thin) together with cyano activator
spray; use whichever adhesive you prefer
unless the building instructions expressly prescribe the use of a
particular type.
Before you start building the model:
If you are buying a radio control system for this model, check that the transmitter and receiver are suitable for
model aircraft
and bear the standard type-approval sticker.
The frequency bands used for radio control systems are shared by other radio equipment and radio-frequency
apparatus, so we cannot guarantee that you will not suffer interference when using your system.
Individual countries may require you to pay for a licence to operate your radio control equipment. In Great
Britain a licence is not required to operate 35 MHz radio control equipment, but you should check with your
local authority for any by-laws restricting its use. This information may not apply to other countries.
Your local Post Office or model shop will be able to provide more information on this subject.
Essential tools
You will need all the tools typically present in a well-equipped modelling workshop. You will certainly require a
mains-powered or battery-powered drill with a set of twist drills. Rotary cutters, sanding drums etc. for
roughening joint areas and cleaning up cut edges make many tasks easier. A large unobstructed working surface
(table) is a basic essential for assembling the model.
During construction
Adhesives and paints contain solvents which may be hazardous to health under certain circumstances. Read and
observe the notes and warnings supplied by the manufacturer of these materials. Take waste glue and paint back
to the model shop for disposal, or to your local toxic waste collection centre.
Take care to keep tools, adhesives and paints out of the reach of children.
A large, unobstructed working surface is a great advantage for all types of model-making.
Gluing different materials
All glued joints must be carried out with great care, and this applies in particular when you are gluing the control
surface horns in place, and fixing the plates which support the RC system and turbine components. Take care
also with the formers, mounting plates and rails associated with them, in so far as they are not already factory-
installed. When using two-pack adhesives keep strictly to the stated mixing ratio. Heat is generated when cyano
is used in conjunction with activator spray, and this can cause discoloration of the model’s skin (painted surface).
It is often advantageous to use thickening agents such as chopped cotton strands with two-pack resin glues, as
this prevents the adhesive running out of the joint.
The cable tie retaining plates (No. 33) included in the kit are self-adhesive (double-sided tape) as standard.
Experience shows that the adhesive power declines with time, so strengthen the joints with a drop of
cyano.
Please note: you must not use cyano for gluing the horns to the control surfaces. The horns must be
bonded to the elevons and rudders, and the speedbrake, using epoxy laminating resin or UHU endfest 300.
If you are using UHU plus endfest 300 or epoxy laminating resin, be sure to use an adequate quantity of the
adhesive. In the case of the horn joints, this means
completely filling
the machined horn slots with resin!
