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Graupner MC16 Manual

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Automatic Gyro Gain Control
(access via Set-Up Menu)
78 Helicopter
Gyro Control
With this option you can reduce the effect of the
Gyro sensor with increasing tail rotor stick excursion.
This will only work with a gyro system which allows
the gain to be control from an auxiliary channel of the
transmitter.
In central position of the tail rotor control stick and a
proportional module attached at socket CH 7 of the
transmitter plate the set gyro effect results. With
manipulation of the tail rotor control this effect is
reduced to the value, which corresponds to lower
setting of the control slider (CH7).The position of the
tail rotor control stick at which this minimum value is
reached can be adjusted.
The automatic gyroscope gain reduction can be
switched off using a switch attached to switch
position 7 on the transmitter board.
Basic adjustment of the Gyro sensor
In order to obtain as optimal a stabilisation of the
helicopter around the vertical axis as possible by the
gyroscope, the following suggestions should be
considered:
• The control linkage to the tail rotor should be as
low-friction and as free from play as possible.
• The control linkage should be rigid (no flexing).
• A strong and above all fast servo should be
used.
The faster the reaction of the Gyro sensor in
recognising a turn of the model, and then making the
necessary change to the tail rotor thrust to correct
the turn, the further gyroscope gain effect be
increase by rotating the gain adjusters. This should
be done so that the tail of the model does not begin
to oscillate, and will give better is stability around the
vertical axis. Otherwise the danger exists that the tail
of the model would begin to oscillate during small
gyro signals.
In addition, during high forward speeds and/or when
hovering with a strong head wind the stabilising
effect of the vertical fin in addition to the gyro’s effect
can lead to a over reaction, where oscillating of the
tail again becomes noticeable.
In order to achieve an optimum stabilisation in each
situation, the gyro effect can be adapted from the
transmitter using a slider control in connection 7. In
the upper end position of the control only gyro
adjuster 2 is effective. This is adjusted in such a way
that with zero wind in hovering flight the model does
not oscillate. In the lower end position of the control
7 only gyro adjuster 1 is effective. If you rotates this
to the minimum gyroscope effect, the gyro effect can
be set anywhere between "0" and the maximum
effect set (with adjuster 2) using control 7.
Under normal conditions you would however
normally set adjuster 1 so that the model does not
oscillate with the maximum speed or extreme head
wind. You can then vary the gyro sensitivity from the
transmitter to suit the weather conditions and the
intended flight program.
Notice
:
The effective stabilisation amount provided by the
Gyro sensor depends on the settings of the two
adjusters on the gyro:
Adjuster 1 set the minimum gyro effect and adjuster
2 the maximum effect.
The effect can be set between these two limits using
the slider control on channel 7.
Setting the Gyro control (Automatic Gain)
After selection of this option the display initially
shows "GYS OF" (gain system is not programmed).
The option is switched on with the INC or DEC
buttons, and the display will now show the gyro
effect setting, from the control slider, where "100%"
correspond to the upper limit and "0%" the lower
limit. With CH SEL the Gyro control setting screen is
selected. Using the INC and/or DEC buttons the tail
rotor control stick displacement point can be
specified, at which the gyro effect is reduced to the
value given by the low position of slider 7. "100%"
means full-scale (slow gain reduction) and "50%"
half travel of the tail rotor control stick (fast gain
reduction). After swapping back with the CH SEL
button you can now observe the gyro gain reduction
effect in the display when moving the control stick.
Witt CLEAR the gyro control can be switched off
again, which can also be done with switch 7.
… 78 …


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