GRAUPNER mx-20 Hott, Programming Manual

Page: 88 / 296

88 Detail program description - Helicopter type
The "Pitch min" line is used to adapt the direction of
operation for the throttle/pitch control stick to your
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.
Press the center
SET button in 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 arrow keys of the right touch pad.
Pitch
These mean:
"fwrd.": minimum pitch setting when the pitch joystick
(C1) is "forward", i.e. away from the pilot.
"back": minimum pitch setting when the pitch joystick
(C1) is "back", i.e. toward the pilot.
Simultaneously pressing the

or

keys of the
right touch pad ( CLEAR ) will set this option to "rear".
Notices:
C1 trimming affects only the throttle servo. •
The so-called "throttle limiter" is set by default, see text •
beginning page 104, such that the throttle limiter for full
throttle can be set independently of the pitch servo via
input
"Th.L.12" in the "Control adjust" menu.
Since your models will typically be operated with the •
same pitch-min direction, this specifi cation can be
conveniently preselected in the "transmitter-specifi c"
"
Basic Settings " menu, page 224. This specifi cation
will 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 thro lim. " line with the

arrow keys of the left or right touch pad, the
corresponding entry fi eld will be framed.
Expo thro lim. 0%
SEL
Linear. swashpl. no
Rotor direct right
HELI TYPE
Pitch min. back
The "Throttle limit" function, described in the text for the
"
Control adjust " menu on page 104, can be assigned
an exponential characteristic curve.
A pitch progression rate value between -100 % and
+100 % can be set with the arrow keys.
For example, this is meaningful when the throttle limiter
is to be regulated in parallel with the idle setting. Further
details about the throttle limiter can be found in the text
for the "
Control adjust " menu on page 100.
An example of two Expo throt-
tle limit curve characteristics
for 100 % servo travel.
continuous line:
negative expo values;
dashed line:
positive expo values
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