S.limit - Swashplate Limiter - GRAUPNER mz-24 Pro Programming Manual

S.Limit
Adjustable Limitation and Deflection Rotation
This function acts like a circular mechanical fence lim-
iting the maximum possible tilting of the swashplate
for aileron and elevator.
To adjust these settings, from the main display press
the FUNCTION menu gear icon (blue "F") to bring up
the FUNCTION submenu screen:
000%
000:00.0
000 000
mz
000:00.0
0:01:23
Press
M - 3
000
000
PHASE 1
Starlet
BATT TIME 00: 01: 23
000
From the FUNCTION submenu display, press the
S.Limit icon:
BACK BASE FUNCTION
Phase D/R,EXP PIT.CRV THR.CRV
THR.HOLD Swash S.Limit S.MIX
Press
Prog.MIX Trainer PIT>>TAIL Logical sw
Swashplate Limiter
The normally square path of a control stick (marked
with a red circle):
BACK S.Limit
ACT INH
SET 100%
ROLL 000%
NICK 000%
Swash rotation 00°
Turning the limiter ON in the ACT line limits the max-
imum control stick path to a circular area:
000%
4.2V
Limiting swashplate movements is important. If the
helicopter is adjusted so that the deflections for roll
and/or elevation exploit the maximum travel mechan-
ically possible (e. g. for 3D helicopters) then the total
tilt applied to the swashplate when full roll and ele-
vation commands are applied simultaneously will be
000
considerably greater (141% in numerical terms). The
swashplate mechanism may then strike its endstops
and, in the worst case, the ball-heads could be dis-
engaged.
SYSTEM
Gyr/Gover
THR.MIX
Sequence
The limitation of the overall swashplate deflection
or the swashplate tilt angle can be limited between
100% (deflection has circular limit to the value achiev-
SERVO
able with roll or elevation) and 200% (no effective lim-
it). Press to highlight the value field in the SET line.
INC
Press the
INC
( pq ) to increase/decrease the value. The function
RES can be deactivated by selecting
DEC
Press the RES
back to the default.
BACK S.Limit SERVO
ACT ON
INC
SET 100%
ROLL 000% RES
DEC
NICK 000%
Swash rotation
00°
BACK S.Limit SERVO
ACT ON
INC
SET 200%
ROLL –100% RES
NICK +100% DEC
Swash rotation 00°
DEC
or buttons or the arrow keys
INH in the ACT line.
button to reset the changed value
Swash Rotation
With some rotor head controls, it is necessary to tilt
the swashplate in different direction than the intend-
ed rotor plane angle during cyclical control, i.e. the
point at which the rotor pitch is starting to change is
typically before the point where it actually affects the
model orientation. If a phase angle is added to a the
head, the inputs are then out of line with the desired
movement direction. This can cause banking.
For example, if a four-blade rotor is used, it may be
necessary to turn the actuation 45° to the right or left
so that the control linkage from the swashplate to the
rotor head can be exactly vertical. The blades can
now be controlled without undesirable differentiation,
and the controlling linkage then does not have to be
mechanically changed. Negative angles equate to a
virtual rotation of the rotor head to the left; positive
angles a virtual rotation to the right.
BACK S.Limit
ACT ON
SET 140%
ROLL –099%
NICK +099%
Swash rotation +45°
To save and exit, press the BACK
left of the display to return to the previous menu.
Function menu | Helicopter model - S. Limiter
SERVO
INC
RES
DEC
button at the top
173