Graupner GmbH & Co. KG MC-20 用户手册

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100 Detail program description - Helicopter type
Pitch min
After selecting the »Pitch min.« (pitch minimum) line
with the 
cd selection keys of the left or right touch 
pad, the entry fi eld will be framed.
Linearis. swashpl.
Swashplate type
no
1 Ser vo
Rotor direction
right
H E L T Y P E
Pitch min.
rear
SEL
The »Pitch min.« line is used to adapt the actuation 
direction of the throttle/pitch joystick to personal 
control preferences. All other helicopter program 
options which involve throttle and pitch functions, e.g. 
throttle curve, idle trimming, tail rotor mixer, etc., are 
dependent on this setting. 
Tap the center 
SET
 key of the right touch pad. The 
operating direction of the throttle/pitch joystick will be 
displayed in inverse video. Now choose the variant 
needed with the selection keys of the right touch pad.
Pitch
These mean: 
"fwd.": 
minimum pitch setting when the pitch 
joystick (C1) is "forward", i.e. away from 
the pilot.
"rear": 
minimum pitch setting when the pitch 
joystick (C1) is "back", i.e. toward the pilot.
A simultaneous tap on the 
cd or ef keys of the 
right touch pad (CLEAR) will set this option to "rear".
Notes:
C1 trimming affects only the throttle servo. 
The so-called "throttle limit" is set by default, see 
text beginning page 117, by way of input "GL16" in 
the »Control adjust« menu with which the throttle 
servo can be limited, independent of the pitch 
servo, in the full throttle direction.
Since a given user's models will typically be 
operated with the same pitch-min direction, this 
specifi cation can be conveniently preselected 
in the "transmitter-specifi c" »General basic 
settings
« menu, page 259. This specifi cation will 
then be adopted automatically when a new model 
memory is created in the »Helicopter type« menu 
but, if desired, can be adapted on a model-specifi c 
basis as described.
  Expo throttle limit
After selecting the »Expo throttle lim.« line with the 
cd selection keys of the left or right touch pad, the 
entry fi eld will be framed.
Linearis. swashpl.
no
Rotor direction
right
H E L T Y P E
Pitch min.
rear
SEL
Expo throttle lim.
0%
The "Throttle limit" function described in the »Control 
adjust
« menu, see page 117, can be assigned an 
exponential characteristic curve.
A pitch progression rate between -100 % and +100 % 
can be set with the selection keys.
For example, it is practical to have the throttle 
limit  – by default, the right-side proportional rotary 
slider – also regulate the idle setting. Further details 
about the throttle limit can be found in the text for the 
»Control adjust« menu beginning page 112.
An example of two exponential 
throttle limit curve characteristics 
for 100 % servo travel.
continuous line:
negative exponential values;
dashed line:
positive exponential values
  
  
 # 
         "    $   &      
  Throttle limit warning
Rotor direction
right
H E L T Y P E
Pitch min.
rear
SEL
Expo throttle lim.
0%
Thr. limit war ning
–70%
If the carburetor is open too far when the transmitter 
is switched on, an acoustic warning will be sounded 
and a warning will be presented in the display.
Throttle
     too
       high!
The »Thr. limit warning« option permits the setting of 
a variable for the critical position of the throttle servo 
between 0 % and -100 %, above which the warning 
will be issued. The reference point for this option is 
the "fwd." or "rear" Pitch min. joystick position set in 
this menu.