GRAUPNER mx-20 Hott, Programming Manual

Page: 94 / 296

94 Detail program description - Joystick setting | Helicopter model
Both joysticks are equipped for digital trimming. With
each brief push (one "click") on a joystick it will change
its neutral position by one increment. Holding the stick
longer will cause trimming to run in the corresponding
direction at increasing speed.
The current position is shown on the screen and
adjustment is also made "audible" by various high
frequency tones. This makes fi nding the mid-point during
fl ight easy, without looking at the screen. If the mid-point
is overrun, a brief motion pause will be inserted.
Current trim values are automatically stored when a
model memory change is made.
Furthermore – except for trimming the throttle/brake
joystick – digital trimming is effective selectively either as
a global parameter, i. e. consistent in all fl ight phases, or
as a fl ight-phase specifi c parameter. This specifi cation
as "global" or "phase" is made in the "Joystick setting"
menu described here, whereas throttle trimming is
always made "global" by software, i. e. independent of
fl ight phases.
This setting is visualized in the base screen by a
"shadow" on trim bars:
shadow present = global, •
no shadow = fl ight phase dependent. •
In the following fi gure nick trimming is used as an
example of fl ight-phase dependence – presented in its
default Mode 1 at the left – .
STARLET
#02
2:22h
Stop
Flt
«Nor mal »
K78
0:00
0:00
5.5V
5.2V
M
HoTT
Joystick setting
Setting stick mode 1 through 4
Scroll with the arrow keys of the left or right touch pad to
the
" Stick mode " menu item of the multifunction menu.
Suppress models
Model select
Base setup model
Model type
Copy / Erase
Suppress menus
Open this menu item by pressing the center SET button
in the right touch pad.
Model select
Base setup model
Model type
Copy / Erase
Suppress models
Suppress: TOG
This menu, adapted for helicopter models, permits
the trim effects of the four digital trim levers to be
established and control functions 1 through 4 to be
selectively "decelerated".
The desired line can be reached by using the arrow
keys of the left or right touch pad. Once the appropriate
function fi eld has been selected and then the center
SET button in the right touch pad is pressed briefl y, the
fi eld will appear in inverse video and the desired setting
can be made with the arrow keys of the right touch pad.
Column "Tr" (trim)
These setting variations are confi gured to accommodate
the needs of helicopter models, which is why the following
alternative options are available for the "Thr." line:
Tr
+
4
4
4 0.0s
0.0s
0.0s
4 0.0s
0.0s
0.0s
0.0s
0.0s GL
GL
GL
St
PH
Ch.1
Aile
Elev
time
Rudd
"TL": "throttle limit"
C1 trimming operates as idle trimming when
the "throttle limit" function regulates the motor
for starting, see "
Control adjust " menu,
page 104.
"AR": "autorotation throttle"
C1 trim operates as idle trim exclusively in the
"Autorot" fl ight phase.
This makes it possible to assign a principle
(fi xed) preset AR throttle position in the
"
Helicopter mixer " menu, page 164, e. g. for
use during autorotation practice, which can be
"varied" with the idle trim lever.
Simultaneously pressing the

or

keys of the right touch pad ( CLEAR ) will
switch this option back to "TL".
On the other hand, the trim effects of respective digital
trimming controls for the lines "Roll", "Nick" and "Tail
rotor" can be switched over from "GL" to "PH" and vice
versa. Example:
Tr
+
4
4
4 0.0s
0.0s
0.0s
4 0.0s
0.0s
0.0s
0.0s
0.0s
GL
GL
St
PH
Thr.
Roll
Nick
time
Tail
TL