ROBBE Hydrasnake 3224 Mode D'emploi page 3

Specification
Wingspan: approx. 1400 mm
Overall length: approx. 880 mm
Total surface area: approx. 62 dm
All-up weight: min. 1050 g
Total surface area loading: min. 18 g / dm
Please see the enclosed sheet for details of essential
items not included in the kit.
Refer to the main robbe catalogue for information on tools
and aids to building.
Sequence of assembly
Study the illustrations and the associated brief texts before
starting construction, so that you have a clear understan-
ding of the individual stages.
Use robbe Speed Type 2 cyano-acrylate ("cyano") and
cyano activator for all joints on this model.
You will need a perfectly flat building board for joining the
wing panels.
Directions such as "right-hand" are as seen from the tail
of the model, looking forward.
Radio control system
For this model you will need a radio control system with at
least four channels and two servos, plus an electronic
speed controller for the motor.
The transmitter must feature an integral delta mixer.
We recommend that you work out the best positions for
your radio control system components before you start buil-
ding the model.
If you wish to use a system other than the one we recom-
mend, you can still follow the basic arrangement shown;
you may need to make allowance for minor differences in
component size.
Assembly and operating instructions
Before you start construction, connect the radio control
system, set the transmitter sticks and trims to centre, and
switch the transmitter and receiver on. The servos will now
move to their neutral positions. Remove the servo output
2 discs or arms if fitted.
2 Always move the throttle stick to the "motor stopped" posi-
tion before switching the transmitter on. Only then should
you connect the flight battery in the model.
To switch off: always disconnect the battery from the speed
controller first, and only then switch the transmitter off.
Painting
It is not necessary to paint the model.
Fig. 1
Cover the building board with plastic film to prevent the
wing panels sticking to it.
Lay the wing panels on the building board, with the printed
top surface facing down. This automatically sets the correct
dihedral.
Fig. 2
Glue the panels together using cyano and activator. Check
that the panels are resting squarely on the building board,
and are not twisted relative to each other.
Fig. 3
Slot the motor mount components together.
Glue the parts together using cyano.
Fig. 4
Place the motor mount on the model and set it exactly cen-
tral.
Mark the position of the motor mount on the wing, then glue
it in place using cyano.
Hydrasnake
3
Fig. 5
Set the servos to neutral from the transmitter. Cut down two
output arms as shown, and fit them on the servos as a mir-
ror-image pair.
Fig. 6
Glue the horns to the elevons; they should be located at
right-angles to the leading edge of the control surfaces, and
positioned equally on each wing.
Cut out the servo wells to suit the servos you intend to
install. Ensure that the horns are in line with the servo out-
put arms.
Cut slots on both sides. Draw the reinforcing cords through
and glue them using cyano.
Fig. 7
Glue the winglets to both wingtips using cyano.
Fig. 8
We recommend that you apply self-adhesive glassfibre
tape to the underside of the wing where marked. This is
particularly important if you intend flying the model fast.
Fig. 9
Attach the appropriate connectors to the motor and the
speed controller, as described in the instructions supplied
with them.
Fix the motor to the motor mount using two M3 x 6 screws.
Install the propeller driver and the propeller.
Caution: the motor operates in the pusher configuration, so
the propeller must be fitted with the cambered side (with the
propeller size printed on it) facing forward.
Fig. 10
Glue the servos in the prepared wells.
Connect the elevon horns to the servos using the pushrods
supplied. The trailing edge of the control surfaces must be
trimmed "up" by about 3 mm when the servos are at cent-
re. Take care to set both elevons at exactly the same angle.
No.
3224