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Piezo Gyro G 400
Caution: This gyro operates on a new principle. Please be sure to read the instructions
before using the system for the first time.
1. Foreword:
The robbe Piezo Gyro G 400 is a precision gyro system of revolutionary design based on
a piezo sensor, and is suitable for fixed-wing model aircraft and helicopters.
This modern piezo-gyro provides two different modes of operation:
Normal mode
In this mode the gyro stabilises the aircraft around one major axis (e.g. tail rotor), as with
earlier types of gyro system. If an external influence such as a gust of wind, or a rapid
change in rotational speed or collective pitch pushes the model out of its intended positi-
on, then the piezo-sensor picks up and measures the change, converts it into a compen-
satory signal and passes it to the tail rotor servo which then carries out the necessary cor-
rective action.
Heading Hold mode
Heading Hold means „maintaining direction". In this mode the Piezo Gyro G 400 works pri-
marily as a conventional gyro, but at the same time the unit „remembers" the current posi-
tion of the model. If it is then pushed out of position around the gyro axis by an external
influence such as wind etc., the electronic circuitry calculates the total deviation and cau-
ses the tail rotor to move the model back into its original position. In practice this process
of returning the helicopter to its original position is
completed so quickly that the deviation hardly
seems to occur at all. The model stays rock-solid in
its intended position as if „nailed" to the sky.
Moreover this is true without any regard of the
model's attitude, i.e. if its heading is cross-wind, or
with a tail-wind, or even if it is inverted, under all cir-
cumstances the Piezo Gyro G 400 attempts to main-
tain this position.
Note:
If you wish to achieve maximum performance the
Piezo Gyro G 400 should always be operated in con-
junction with a very fast tail rotor servo. Of course,
servos of normal transit speed can still be used, but
the stabilisation effect will not be quite as perfect as
with a super-fast servo.
Recommended servos:
4.8 Volt power supply (4 NC, Ni-MH)
S 9253 servo Order No. F 1278
6 Volt power supply (5 NC, Ni-MH)
S 9254 servo Order No. F 1266
Servos for small electric helicopters:
S 3101,Order No. F 1258 or FS 500 Micro BB, Order No. 8460.
Ready Rev Gain
Ready Rev Gain
Servo
3D
Servo
G-400
Aux
GYRO
Aux
Piezo Gyro with
Piezo-Gyro
Rx
Headling Hold
Normal and Heading Hold
No. 8065
Rx
Made in Germany
No. 8067
1
2
Ch. 4
3
Receiver
4
5
6
Ch. 5
7
8
Sketch 1
10
No.
8067
2. If you are in a real hurry, here are brief instructions for getting the gyro working:
·
Connect the system as shown in Sketch 1
·
Switch on the transmitter
·
Switch on the receiver
·
Do not touch the model or Piezo Gyro G 400 for about 10 seconds while the Piezo
Gyro G 400 carries out its zero calibration procedure.
·
When ready -> tail rotor servo runs to starting position and the red „Ready" LED on
the Piezo Gyro G 400 lights up
·
Move channel 5 slider to one end-point
·
Move tail rotor stick to one end-point and release it
·
If servo moves back to its original position -> Normal mode
·
If servo stays in the end-point position -> Heading Hold mode
·
Slider 5 acts as change-over switch between the two modes, and is also used to adjust
gyro gain (sensitivity).
At centre position:
At position direction: I
At position direction: II
Piezo Gyro G 400
0%
0% - 100% „Normal" mode
0% - 100% „Heading Hold" mode
I
100 %
Normal Modus
Normal mode
0 %
Heading Hold Modus
Heading Hold mode
LINEAR
100 %
II
Sketch 2
11
No.
8067
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