GRAUPNER mx-20 Hott Programming Manual page 286

Pitch
Thr setting AR
Tailoffset AR
Gyro suppress
Swash rotation
Swash limiter
Autorot
The line "Thr. setting AR" is important. Enter the value
to the right depending on the servo direction to either
approximately +125 % or -125 %.
Pitch
Thr setting AR
Tailoffset AR
Gyro suppress
Swash rotation
Swash limiter
Autorot
In doing so, the motor is safely switched off in the
autorotation phase (in case of emergency). Later, when
you have gained enough experience to practice the
autorotation fl ight, a more stable idle can be entered
here.
Adjustment notice for electric helicopters:
Since the motor must also be shut off for electrically
powered helicopters in case of an emergency, this
setting is adopted without change.
The further submenus are not important at the moment.
By switching off "autorotation", it returns to the fi rst
menu list.
Select the setting screen of "C1  Tail" in order to
adjust the static torque balance at the tail rotor. In this
case, also work with a maximum of three interpolation
286 Detail program description - Control adjust
points; everything else is reserved for the experienced
pilot. For this purpose, change the presetting intended
–90%
for heading lock systems from a uniform 0 % at point
0%
"L" (pitch minimum) to -30 % and at the opposite end, at
0%
point "H" to +30 % (pitch maximum). These values may
0°
have to be corrected in fl ight. If applicable, you must also
OFF
set point "1" in the center when doing so:
C1
Cur ve off
Input
Output
Point
–125%
Normal
0%
0%
Now, for testing purposes, switch back to the
0°
autorotation phase. Here the setting is also deactivated;
OFF
the tail servo no longer reacts to pitch movements
SEL
(no torque usually arises when the main rotor is not
powered). All additional interpolation points are not
currently of importance yet.
If, contrary to the specifi cation, the gyro has a
transmitter-side sensitivity setting, you still need a free
proportional control, e.g. CTRL 7. In the menu ...
"Control adjust" (page 100 ... 107)
... you can assign this to the "Gyr" input. Activate the
control assignment by briefl y pressing the central
key of the right touch pad and then turning the rotary
control until its control number appears in the display:
Tail
0%
0%
? 0%
SET
Input 5 GL –––
6 GL
Throt –––
Gyro 7 GL Ct7
Input 8 GL –––
normal
typ
Conclude this entry by briefl y pressing the
the left touch pad and then switch with the arrow key 
of the left or right touch pad to the "- Travel +" column.
After pressing the central SET key of the right touch
pad, the maximum sensitivity of the gyro, e. g. 50 %, can
now be set in the inverse value fi eld. For this purpose,
rotate the selected control to the corresponding screen
so that only one value fi eld is represented inversely:
Input 5 +100%
Throt 6 +100%
Gyro 7 +100%
Input 8 +100%
Nor mal
– travel +
Now you have a fi xed value as long as the rotary control
is at the right limit position. The correct value must be
adjusted in fl ight.
In the process, however, always observe the
adjustment instructions accompanying your gyro
sensor, because your helicopter will not be able to
fl y otherwise!
To conclude this initial programming, a few words should
be mentioned about the menu ...
0%
0%
0%
0%
offset
ESC key of
+100%
+100%
+50%
+100%