ROBBE Hydrasnake 3224 Mode D'emploi page 4

Fig. 11
Cut out the apertures for the speed controller (Contr.) and
the receiver (Rx) and fix these components in place using
Velcro tape.
Connect the extension leads to the servos. Cut slots in the
wing and press the extension leads into them.
Cut another slot running to one wingtip for the receiver aeri-
al.
Fig. 12
Mark the Centre of Gravity "C.G." on the top surface of the
wing in the position shown.
Fig. 13
Note: it is possible to install one or two flight batteries. If you
wish to use two packs, they have to be wired in parallel.
This is achieved by soldering the sockets and plugs
together in the configuration shown, and insulating them
with pieces of heat-shrink sleeve.
Fig. 14
Support the model at the marked Centre of Gravity. Lay the
batteries (Bat) on the leading edge of the wing, and adjust
their position until the model balances level.
Mark the correct battery position, and cut wells for the bat-
teries.
Fix the batteries in place using Velcro tape.
Fig. 15
The batteries can be wired together as shown using the pre-
pared cables and connectors. Cut the cable ducts in the
wing to such a depth that the individual contacts cannot
touch each other.
Don't connect the batteries until it is time to check the wor-
king systems.
Fig. 16
The self-adhesive glass fibre tape can now be used to secu-
re the RC components and the flight batteries.
Assembly and operating instructions
Hydrasnake
Checking the working systems, Figs. 17 and 18
- Program the delta mixer at the transmitter.
- Switch on the transmitter, then switch the receiving
system on by connecting the flight battery or batteries.
- When you move the aileron stick to the right, the right-
hand elevon should rise, the left-hand elevon fall.
- Pull the elevator stick back towards you, and the trailing
edge of both elevons should rise.
- If either elevon works the wrong way round, correct it
using the servo reverse facility for that channel on the
transmitter.
- Use the servo travel adjustment feature on your transmit-
ter to set the elevon travels as stated in Fig. 17.
- Note: whenever you are adjusting or otherwise working
on the model, keep well clear of the rotational plane of
the propeller - injury hazard. Ensure that nobody stands
close to the model when the motor is running.
- Caution: adjust the throttle channel in such a way that the
motor cannot burst into life when it is at the idle position.
Read the speed controller instructions for details.
- Check the direction of rotation of the motor: the propeller
output shaft must rotate in the direction shown by the
arrow (Fig. 18). If this is not the case (e.g. if you are using
components other than those recommended), you can
reverse the direction of the motor by swapping over any
two motor cables.
Test-flying, flying notes
Please read the sections entitled "Routine pre-flight
checks" and "Flying the model" in the Safety Notes befo-
re attempting to fly the model for the first time.
- For your first few test-flights please wait for a day with no
more than a gentle breeze.
4
- A good flying site consists of a large, flat, open grassy
field. Keep well clear of obstacles such as trees, fences,
high-tension overhead cables, etc.
- Check all the working systems one last time.
- Ask an experienced friend to launch for you; he should be
capable of giving the model a reasonably powerful hand-
launch.
- The model must be launched directly into wind.
- Give the model a strong launch directly into wind, then
switch the motor on.
- If you prefer to launch with the motor already running,
please take care not to touch the spinning propeller with
your fingers.
- Keep the Hydrasnake flying straight and level at first.
Don't turn it when it is close to the ground.
- Adjust the trims if necessary to obtain a smooth climb.
- It is important to observe carefully how the model res-
ponds to transmitter commands in flight. If you need to
increase or reduce travel, make the appropriate adjust-
ments as soon as the model is back on the ground.
- Slow the model down at a safe height so that you can
recognise its stalling speed.
- Carry out the landing approach at a safe speed, i.e. well
above the stall.
- If you had to adjust the trims during the flight, correct the
pushrod lengths after the landing and return the transmit-
ter trim sliders to centre, so that full trim travel to both
sides of centre is available for subsequent flights.
robbe Modellsport GmbH & Co. KG
We reserve the right to alter technical specifications
No.
3224