GRAUPNER mc-32

116
Program description - Stick mode | Helicopter models
Both sticks are equipped for digital trimming. When
turning trim wheels, every "click" will shift the stick's
neutral position by a certain value.
The current position is shown on the screen and
the adjustment is also made "audible" with acoustic
tones. This makes finding the mid-point during flight
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
stick – digital trimming is effective selectively either as
a global parameter, i. e. consistent in all flight phases,
or as a flight-phase specific parameter. This specifi-
cation as "Global" or "Phase" is made in the »Stick
mode« menu described here, whereas throttle trim-
ming is always made "global" by software, i. e. inde-
pendent of flight phases.
This setting is visualized in the base screen by a
"shadow" on trim bars:
• shadow present = global,
• no shadow = flight phase dependent.
In the following figure, pitch-axis trimming is used as
an example of flight-phase dependence – presented
at the left in its default Mode 1.
Stick mode
Setting stick mode 1 through 4
0:00h
Stop watch
Flight tim
K78
0:00.0
4.1V
0:00.0
00
0
0
0:00h
M
V
H-J Sandbrunner
Normal
#02
Starlet
RX VOLT:4.9V
Use the selection keys on the left or right touch pad to
scroll to the »Stick mode« option in the multi-function
menu:
Model select
Servo adjustment
Stick mode
Control adjust
Dual Rate / Expo
Channel 1 curve
Switch display
Copy / Erase
Suppress codes
Suppress models
Base setup model
Helicopter type
Open this menu option with a tap on the centre SET
key of the right touch pad.
Thr trim
Pitch/thr
Roll
Pitch ax
Tail rot.
Tr i m
0.0s
Tr. step – time +
global
0.0s
global
0.0s
global
0.0s
0.0s
0.0s
0.0s
0.0s
4
4
4
4
Trim
These setting variations are configured to accom-
modate the needs of helicopter models, which is why
the following alternative options are available for the
"Thr." line:
Thr trim
Pitch/thr
Roll
Pitch ax
Tail rot.
Tr i m
0.0s
Tr. step – time +
global
0.0s
global
0.0s
global
0.0s
0.0s
0.0s
0.0s
0.0s
4
4
4
4
• “TL“ (Throttle Limit)
C1 trimming operates as idle trimming when the
“throttle limit” function regulates the motor for
starting, see »Control adjust« menu, page 128.
• “TA“ (Throttle Autorotation)
C1 trim operates as idle trim exclusively in the
«Autorot» flight phase.
This makes it possible to assign a principle (fixed)
preset AR throttle position in the »Helicopter
mixer« menu, page 206, e. g. during autorotation
practice with the trim function “varied”.
• “PT“ (Pitch)
Due to internal coupling, C1 trimming acts equally
on all pitch servos available without influencing the
throttle servo.
On the other hand, the trim effects of respective digi-
tal trim controls for the lines "Roll", "Pitch ax" and "Tail
rot." can be switched over from "Gobal" to "Phase"
and vice versa.