GRAUPNER mz-24 Pro Programming Manual page 158

Notice
When selecting a phase that has not been de-
fined, by default only Phase 1 is active and the
associated controller will not have any effect.
To save and exit, press the BACK
left of the display to return to the Pitch curve menu:
BACK
CTL MIXER POINT PHASE
Press
SL 1 THR.CRV 3 2
NONE NONE NONE 1
NONE NONE NONE 1
NONE NONE NONE 1
NONE NONE NONE 1
NONE NONE NONE 1
Notice
The settings in the Pitch Curve submenu affect
the same settings in the Throttle Curve submenu
(page 160). Changes made to either section al-
ways affects the other.
158 Function menu | Helicopter model - Pitch curve
Autorotation Setting
In a powered flight, the maximum wing angle is lim-
ited by the available motor output; in autorotation
flight, however, it is limited by the stall at the main
rotor blades. To provide sufficient lift (even while the
speed is decreasing when flaring the helicopter), the
button at the top
maximum pitch needs to be set.
Switch to the autorotation phase, and move the green
vertical line to the H point with the control stick. Set a
SERVO
value that is about 10% to 20% higher than the nor-
mal maximum pitch. At the very beginning do not set
a value that is significantly higher than normal flight
INC
since of the behavior of the pitch control will be signifi-
RES
cantly different after switching, in comparison to the
DEC
usual reaction. The danger exists of over-controlling
after flaring with the model continuing to rise; then
high above the ground the motor speed will suddenly
decrease and the model will drop. After a few test
autorotations, the value can always be readjusted.
The minimum pitch can be different from that for nor-
mal flight, depending on conventional control practice
during normal flight. Set a minimum pitch for the L
point for autorotation that will allow the model to be
brought into a descent of approximately 60-70° out
of a forward flight path at an average speed when the
pitch is reduced to a minimum. If such a setting is
used in normal flight like most of helicopter pilots, the
value can be easily transferred.
If the model's descent is normally at a flatter angle,
increase the value at the L point and vice versa.
Approach angle
Approach angle under different
wind conditions.
The pitch control stick is not necessarily in the bottom
position during autorotation. Typically, it is between
hovering position and the bottom stop so that the lon-
gitudinal inclination can be corrected using the eleva-
tion control.
Shorten the approach by carefully pulling back on the
elevation control and sensitively reducing the pitch,
or extending the approach by pushing the elevation
control forward and carefully increasing the pitch.
To exit the PIT.CRV menu, press the
the top right of the display:
BACK PHASE 1 PIT.CRV
Pitch min FORWARD
Press
CURVE ON
IN –036%
OUT +027%
POINT 2 +027%
ST ON X-axis Y-axis
The FUNCTION submenu screen appears:
BACK BASE FUNCTION
Phase D/R,EXP PIT.CRV THR.CRV
THR.HOLD Swash S.Limit S.MIX
Prog.MIX Trainer PIT>>TAIL Logical sw
in strong
wind
in moderate
wind
no wind
75°
60°
45°
BACK button at
SERVO
TRIM
INC
DEC
ENT
SYSTEM
Gyr/Gover
THR.MIX
Sequence