ROBBE HeliCommand 3A Mode D'emploi page 21

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Safety measures
The term "auto-pilot" does not mean that the model fl ies completely
automatically!
As with any conventional model helicopter fl ying, great care and practice are
required when using this product.
No auto-pilot is capable of eliminating the dangers of operational errors. It
could even be argued that the risks are greater with such an aid, because the
ease of control could allow a pilot to become careless, or sway less trained
pilots into fl ying in situations where they cannot regain control if a technical
fault should occur.
Technical instruments are liable to failure, and a helicopter fi tted with an
auto-pilot incorporates more items which could go wrong.
As everyone knows, fl ight instruments are not immune to problems and failure.
In the interests of safety, no pilot should ever rely exclusively on the stabilisati-
on system, and pilots should satisfy all required safety measures at all times.
We recommend
• Always keep your model a safe distance from persons and objects, and fl y in
a cautious, conscientious manner.
• Do not under-estimate the energy contained in spinning rotor blades.
For practice-fl ying with the larger model helicopters we recommend that you fl y
behind a safety net or football goal, as are present at many model fl ying sites.
• If you are a beginner, ask a model pilot with experience of helicopters to help
and advise you - especially when test-fl ying a new model or a fi rst installation
of the HeliCommand.
• Set the stabilisation level to suit the ambient conditions. Always operate the
auto-pilot in such a way that you can switch it to manual control in fl ight, or at
least in such a way that you can override it in an emergency.
• Always fl y at approved model fl ying sites, well away from residential areas
and public roads, and observe legal requirements.
• Keep well clear of radar stations, radio transmitter masts and other potential
sources of radio interference.
• Third-party insurance is in most places a basic essential when fl ying model aircraft.
• Never take your eyes off the helicopter when it is fl ying.
• If you ever pass on this product, be sure to pass on these warning notes to
the new owner.
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Fault-fi nding
Servos do not move ► see page 8 „LED indicators"
Jitter or oscillation in position mode, especially when close to the ground
• Reduce gain of position mode
• Installed position too low?
► Install as high as possible, see page 17
• try increase PC-setting of aileron & elevator travel and hor-sens-gain.
Machine is not stable in position mode, especially at higher altitude
• Sensor window dirty?
► Protect from exhaust (glow models), clean regularly
• Low-contrast ground surface, e.g. snow, smooth asphalt, water?
► Switch to horizontal mode
• Trim not "learned" correctly? see page 30
• Increase gain further? ► via Pilot channel or PC
• Dense clouds of exhaust gas in the vision beam?
► Set motor leaner, and install unit further away from the exhaust.
• Aerial wire or other obstacles in the sensor view beam?
(see fi rst paragraph on page 17, "Installation")
• Much loose foliage or tall grass etc., moving in the rotor downdraught?
► Switch to horizontal mode.
Flight attitude not steady, in position and in horizontal mode
• Vibration (visible or invisible), or excessive body resonance affecting the case
(especially with glow motors)?
► See Installation > Internal-combustion engines.
• Double-sided foam tape not applied as two narrow horizontal strips?
► See page 16
Trim discrepancies with and without stabilisation
• After take-off the accuracy of stabilisation increases automatically within a
few seconds of fl ying.
• Transmitter trims moved?
► Calibrate ("learn") the neutral setting again.
• Severe temperature fl uctuations?
► Leave the unit for about fi ve minutes to acclimatise, then switch on again.
• Severe vibration?
► See "Flight attitude not steady" fault
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All manuals and user guides at all-guides.com
Liability exclusion
Specialised knowledge and expertise are required in order to install, set up and
operate the auto-pilot and the helicopter itself. Errors and negligence can result
in accidents, which may cause serious personal injury, damage to property or
traffi c accidents. Since the manufacturer and retailer are unable to ensure that
you handle the product correctly and competently, we can do no more than
expressly point out these hazards. We deny liability for any damage resulting
from the use of our products, from problems in the installed instruments and
from failure of the signal transmission link, unless such denial contravenes
statutory requirements.
Guarantee
We guarantee this device for a period of 24 months. The till receipt given to
you when you purchased the product serves as proof of the start and fi nish of
the guarantee period. Any repairs carried out under guarantee do not extend
the guarantee period. During the guarantee period we will correct any functio-
nal defects, material faults or production faults at no cost to you. We will not
consider additional claims, e.g. for consequent damage. Goods must be sent
to us pre-paid; we will pay return carriage. We will not accept packages sent
without pre-paid postage. We accept no liability for transport damage or the
loss of your shipment; we recommend that you take out suitable insurance to
cover this risk.
The following requirements must be fulfi lled if your guarantee claim is to be
processed:
• You must send the till receipt to us together with the product.
• You must have operated the unit in accordance with the operating instructions.
• You must have used only recommended power sources and genuine robbe
accessories.
• There must be no damage present caused by damp, unauthorised
intervention, excess voltage, overload or mechanical stress.
• Please include a brief but accurate description of the fault, to help us locate
the problem.
Automatic trim not working accurately
• Have you moved the transmitter trims?
► See page 30. Either re-calibrate the trim or avoid touching the transmitter
trims.
Drift after tail rotor swing
• Unit not installed exactly vertical; lightweight helicopter with high blade pitch
angle?
► Optimise by fl ying a 90° right-hand turn from the hover, with stabilisation
set to "yellow" mode. If the helicopter was stationary before the
quarter-pirouette, but always drifts in a particular direction afterwards, then
the installed location can be optimised.
If the model drifts at an angle left / forward (relative to the new position),
incline the HeliCommand further to the left; the reverse applies if it drifts right
/ rearward.
If the machine drifts right / forward, tilt the HeliCommand slightly forward; do
the reverse if it drifts left / rearward.
Inverted fl ight:
Roll centre deviation when hovering inverted, or after switching back
► Optimise the setting „neutral tilt compensation"
(using the PC adaptor; see PC set-up software).
Drift after aerobatic manoeuvres (stall-turns, rolls etc.)
• HeliCommand 3A in use?
► Not suitable for inverted
► upgrade to 3D.
• External tail rotor gyro in use, and rotational (yaw) rate > 400° / second?
► Reduce rotational rate (Seite 25)
• Completed a series of full rotations, such as multiple stall-turns, rolls or
loops?
► See notes on page 34!
Tail rotor servo not at centre
• External gyro used recently?
► Erase auto trim values.
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fl ight or steep fl ight attitudes!
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