GRAUPNER mz-24 Pro Programming Manual page 167

Various Gyro Sample Settings
• Linear gyro suppression: 0% to 199%.
With the tail rotor control stick in the center position,
the resulting gyro gain is set using the selected con-
trol. Using a proportional rotary control, the effect is
infinitely variable between zero (min) and maximum
(max), provided that control travel is not restricted.
With full tail rotor deflection, the effective gyro gain
is as follows:
Current control position
minus
gyro suppression value.
At 0% gyro suppression, gyro gain is constant for tail
rotor control stick movement; at 50% suppression,
gyro gain is reduced to half if the assigned control is
moved to the +50% position (as shown below); and
only at >150% suppression is gain reduced to zero
with the control at this position, well before full tail
rotor deflection.
Example:
+50 %
left centre
Stick deflection tail rotor
• Linear gyro suppression with reduced control
travel, e.g. -50% to +80% of full travel.
Gyro gain is smoothly variable within these control
limits.
For example, for purposes of illustration, below are
plotted gyro gain values in relation to tail rotor deflec-
tion for various parameter values of gyro suppres-
sion.
Example:
+80 %
Adjusting the Gyro Sensor
To achieve the maximum possible level of stabilization
for the helicopter with the gyro along the vertical axis,
observe the following:
• The controls should have as little friction and "play"
as possible.
• There should be no "spring" in the control linkage.
• Use a strong and fast servo.
When the gyro sensor detects a model rotation, or a
corresponding corrective change to tail rotor thrust
takes effect, the further the gyro gain adjuster can be
moved without causing the tail of the model to start
right
oscillating, and the better the model's stability on its
vertical axis. If the response is slower, there is risk that
the model's tail will start to oscillate even at low gyro
gain settings. Here, further reductions to gyro gain will
need to be made to eliminate the oscillation.
left centre right
Stick deflection tail rotor
If the model is flying forward at high speed or hovering
in a powerful headwind, the net result of the stabilizing
effect of the vertical fin combined with the gyro may
also lead to an overreaction that once again manifests
itself through tail oscillation. To achieve optimum gyro
stabilization under all conditions, make use of the op-
tion to adjust gyro gain from the transmitter using a
transmitter control assigned to input 7, in connection
with gyro suppression and/or the two settings on the
Gyro NEJ-120 BB.
Further tips on gyros with configurable multilevel
gyro gain (e. g. NEJ-120 BB)
Since specifying the gyro gain from the transmitter pro-
portionally via the transmitter control, the gyro's own
control 1 must be used to set the weaker gyro gain
(e.g. aerobatics) and control 2 must be used to set the
stronger gyro gain (e.g. hovering ). Even though a pro-
portional control is used for control function 7, only a
switch-over between these two values takes place and
the setting is therefore not proportional.
Therefore, advance control 2 to the point where the
model is on the brink of oscillating when hovering in calm
conditions, and advance control 1 to the point where the
model does not oscillate with its tail even when flying at
maximum speed into a strong headwind. Depending on
the state of the weather and the flight program planned,
you can also switch the gyro gain from the transmitter,
possibly with gyro suppression dependent on tail rotor
deflection if required.
Gyro Gain Line
Notice
An offset value input in this option and/or in the
CH7 line of the BASE submenu CTL Set auto-
matically adds itself! For the sake of clarity, make
sure to only enter and/or change an offset value in one
of the two options.
Function menu | Helicopter model - Gyro/Gover 167