GYRO-SYSTEM PIEZO 550 Graupner 5147 Common features
PIEZO 5000 / PIEZO 550:
Two separate auxiliary channels are used to vary
the gyro effect (gain), and to switch between
normal and heading lock mode.
Highly effective regulation of the tail rotor control
system´s angular velocity, permitting amazingly
steady, slow pirouettes even in gusty conditions.
Newly developed drift compensation circuit pro-vides
superior neutral position stability in the tail
rotor control system.
Lightweight, highly sensitive piezo element is
mounted in a double damped suspension
system to de-couple it from vibration in the
model.
NORMAL / REVERSE switch. PIEZO 550 only:
P Can be used with any GRAUPNER/JR servo,
including super-servos and digital servos.
P Fixed response period for heading lock mode. Piezo-electric gyro systems for model helicopters,
designed for competition flying and “3-D” display
work. Conventional gyro systems for model helicopters
simply damp down unwanted movements
around the vertical axis, but these two units offer a
mode of operation in which the gyro system holds
the model pointing in a particular direction, and
moves it back to this heading automatically after
any deviation (“heading lock” mode). This is essential
for all aerobatic manoeuvres which involve flying
backwards, where even the slightest movement of
the tail boom must be corrected right at the outset.
Until now most heading lock gyro systems have
taken a considerable time to integrate the difference
between the nominal and actual heading, and
this means that the model tends to spin uncontrollably
or even carry out a pirouette if allowed to
take-off in heading lock mode. However, the new
PIEZO 5000 / PIEZO 550 only maintains its compensatory
action for a limited period (PIEZO 5000:
variable period) in response to an unintentional
rotation, or to a control command, and continuously
suppresses its action. If you have used an earlier
heading-lock gyro, you may be familiar with the
constant need to re-trim the tail rotor in flight, as
well as having to switch back from heading lock
mode to normal mode for take-off and landing, but
both these new gyros eliminate those problems
completely. This means that these two gyro systems can also
be recommended without reservation to helicopter
beginners, as they help to maintain rock-steady
stability in the tail rotor control system. Power supply voltage 4.8 V (receiver battery)
Current drain approx. 50 mA
Dimensions, weights
- Sensor 32 x 36 x 30 mm, approx. 18 g
- Electronics 38 x 53 x 19 mm, approx. 33 g
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