GRAUPNER mz-24 Pro Programming Manual page 163

Different phase-dependent throttle curves are pro-
grammed for optimum hovering and aerobatics ad-
justment:
• A lower system speed with smooth, soft control
reactions and less noise while hovering.
• A higher rotor speed for aerobatics at the maximum
motor output. In this case, the throttle curve also
needs to be adapted within the hovering range.
Basic Settings
Although the pitch and throttle curves in the mz-24
Pro can be electronically adjusted over a wide range,
all linkages in the model must be mechanically adjust-
ed according to the helicopter instructions. Seek ad-
vise from a flying club or experienced helicopter pilots
for help adjusting the basic settings.
For gas-powered models, the carburetor control must
be adjusted so that the throttle is completely open at
the maximum pitch position. When the throttle limit-
er is closed, the carburetor must be able to be com-
pletely closed with the CH1 trim control, and the servo
may not mechanically over-travel.
For electric models, the motor control unit must be
adjusted so that the throttle is at full power at the
maximum pitch position. When the throttle limiter is
closed, the motor control unit must reliably turn off the
electric power.
Adjust these settings very carefully by simultaneously
adapting the control linkage and/or changing the ar-
ticulation point on the servo or carburettor arm. Only
electronically fine-tune the throttle servo after these
functions are set.
CAUTION
Before starting the motor the first time,
!
become familiar with the dangers and
safety precautions involved in handling
motors and helicopters.
After these basic settings are made, start the motor
according to the motor operating instructions. Adjust
the idling using the trim control of the throttle/pitch
control stick. Set idling positions are displayed in the
transmitter's main menu display by a horizontal bar
correlating to the CH1 trim control position.
Hover Settings
The model should lift off the ground and hover at the
set speed when the pitch control stick is in the center
position. If not, troubleshoot as follows:
1. The model lifts off when the pitch control stick
is past center position:
a) The speed is too low
Solution: Increase the value of
point 1 in the THR.CRV display.
b) The speed is too high
Solution: Increase the pitch angle
of the rotor blades by increasing
the value of point 1 in the PIT.CRV
display.
2. The model lifts off before the pitch control stick
reaches center position:
a) The speed is too high
Solution: Reduce the carburetor
opening by reducing the value of
point 1 in the THR.CRV display.
b) The speed is too low
Solution: Reduce the rotor
blades pitch angle by reducing the
value of point 1 in the PIT.CRV
display.
Notice
Keep adjusting until the model hovers at the right
speed when the throttle/pitch control stick is in
center position. All the other model parameter
adjustments depend on this being perfectly aligned.
Hovering
point
Standard Adjustments
Standard adjustments are made to allow the model to
hover and perform roundtrips in all phases at a con-
Control travel
stant speed. Do not attempt to make standard adjust-
ments until the Hover Settings are perfectly aligned
so the model hovers at the provided speed in normal
Hovering
point
flight when the throttle/pitch control stick is in center
position.
Adjustments for Climbing
Control travel
By combining the throttle/hovering setting (the pitch
setting for the hovering point and the maximum pitch
position of point H), users easily achieve a constant
speed from hovering to maximum climb.
First, perform a slow vertical climbing flight by moving
the pitch control stick to the end position. The motor
Function menu | Helicopter model - Throttle curve
Hovering
point
Control travel
Hovering
point
Control travel
163