Approach angle under different
wind conditions.
Approach angle
in strong
wind
in moderate
wind
no wind
45°
60°
75°
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 BACK button at
the top right of the display:
PHASE 1
SERVO
PIT.CRV
BACK
IN
OUT
POINT
ON
INC
ENT
DEC
Y-axis
TRIM
X-axis
ST ON
CURVE
–036%
+027%
+027%
2
Pitch min
FORWARD
Press
The FUNCTION submenu screen appears:
BACK
SYSTEM
BASE
FUNCTION
Phase
S.Limit
D/R,EXP
THR.CRV
Gyr/Gover
Swash
THR.HOLD
PIT.CRV
S.MIX
THR.MIX
Trainer
Prog.MIX
Logical sw
PIT>>TAIL
Sequence
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 button at the top
left of the display to return to the Pitch curve menu:
BACK
CTL
SL 1
INC
RES
DEC
MIXER
THR.CRV
POINT PHASE
3
2
NONE
NONE
NONE
1
NONE
NONE
NONE
1
NONE
NONE
NONE
1
NONE
NONE
NONE
1
NONE
NONE
NONE
1
SERVO
Press
Notice
The settings in the Pitch Curve submenuaffect
the same settings in the Throttle Curve submenu
(page 160). Changes made to either section al-
ways affects the other.
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
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
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
since of the behavior of the pitch control will be signifi-
cantly different after switching, in comparison to the
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.
158 Function menu | Helicopter model - Pitch curve
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