Care And Maintenance - GRAUPNER SX-4000 Mode D'emploi

Care and maintenance

Clean the model carefully after every run, and remove any water which penetrates the hull. If
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water gets inside the RC components, dry them out and send them to your nearest GRAUPNER
Service Centre for checking.
Clean the model and RC components using suitable cleaning agents only. All you need is a lint-
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free cloth. Never use chemical cleaners, solvents, white spirit, methylated spirit or similar.
After each session lubricate the drive shaft with a small drop of oil applied to the bearings. The
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external shaft bearings adjacent to the propeller must also be lubricated. Use only non-
contaminating, water-neutral oil (e.g. Order No. 206) to lubricate the power train. At the end of the
season the propeller shaft should be dismantled and re-lubricated using water-neutral grease (e.g.
Order No. 570).
• Assembly Instructions
The first step is to solder three G3.5 connectors (Order No. 2970 - not included in the set) to the
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motor wires.
The recommended speed controller is fitted with G3.5 connectors as standard. However, it is also
possible to fit G6 connectors to the motor, controller and battery at the builder's discretion. The
motor is attached to the motor mount using two M3 x 6 mm socket-head machine screws. The
next step is to pack the stern tube with grease before fixing the shaft coupling to the motor shaft.
Slide the propeller shaft into the coupling from the stern. Check the length of the propeller shaft;
you may need to shorten it slightly.
Place the rudder servo in the mount, and secure it with four self-tapping screws. Attach a swivel
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pushrod connector to the servo output arm using an M2 nut. The steering pushrod is clamped in
the pushrod connector using the grubscrew provided.
At the stern of the boat a connector system is installed which enables you to switch the power
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supply to the receiver on or off if a separate receiver battery is used. However, if you are using a
speed controller with integral BEC system, the BEC facility must be disabled by withdrawing the
central pin (+ = red). This avoids the danger of supplying current to the receiver from both the
drive battery and the receiver battery. If you program the speed controller correctly (see drawing
on separate sheet), it is possible to switch the motor off externally in an emergency.
If the power supply conductor to the receiver battery is interrupted (disabled), power is fed to the
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speed controller when the drive battery is connected to it, but it receives no signal from the
receiver (see wiring diagram).
Fine-tuning the racing boat
This model racing boat requires fine-tuning to ensure that it runs at maximum efficiency. The following
points are particularly important if you are aiming at a boat which handles and runs well:
1. The Centre of Gravity should be located at a point 20 to 80 mm from the end of the trim tabs;
please note that the optimum balance point varies greatly according to the propeller you are
using. The crucial point is that the propeller must not skip when the boat is running at full speed.
2. The adjustable trim tabs should be set at an angle of about 4° .
3. The angle of attack of the propeller should be around 2° .
4. Since the boat spends more time flying across the water than passing through it, the all-up weight
should be kept as low as possible, and should not be greater than 1400 g. For this reason all the
components you install should be as light as possible.
Maiden run
Give the batteries a full charge, and test the model's working systems in turn. Seal the hatch cover
with adhesive tape to ensure that water cannot penetrate. You should now be ready for the boat's
maiden run. Take your time to get used to the model's handling characteristics, bearing in mind that
this boat is capable of extremely high speeds, and is therefore not as easy to control as a slower
model.
Important: if you have to turn the boat, it is always best to bring it to a halt first, and then initiate a turn
- preferably to the left - at a low power setting.
We recommend that you only apply full-throttle when the boat is running straight ahead.
Particular care is required when switching the receiver battery on and off. Do not allow your fingers to
get anywhere near the propeller!
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Keine Haftung für Druckfehler. Technische Änderungen vorbehalten!
03/2008