GRAUPNER mz-24 Pro Programming Manual page 164

First, perform a slow vertical climbing flight by moving
the pitch control stick to the end position. The motor
speed should not change in comparison to the hover
setting.
If the speed decreases while climbing even though the
drive is at maximum output and no additional power
can be provided, reduce the maximum blade angle
while the pitch control stick is fully deflected, that is,
the value of point "H". Conversely, increase the pitch
angle if the motor speed increases while climbing. In
the graph of the PIT.CRV display, move the vertical
line to point "H" with the pitch control stick, and cor-
respondingly change its value.
This picture only shows changes of the
maximum pitch setting.
Then make the model hover which should occur when
the throttle in the center position. If the pitch control
stick needs to be moved out of the center position
toward higher values for the hovering point, compen-
sate this deviation by slightly increasing the pitch val-
ue during hovering (i.e., from point "1") until the model
hovers when the control stick is in the center position.
If the model hovers below the center position, corre-
spondingly reduce the pitch angle.
In certain circumstances, it can also be necessary to
adjust the carburettor opening at the hovering point
(point "1") of the THR.CRV display.
164 Function menu | Helicopter model - Throttle curve
This picture illustrates the change of the
hovering point, that is the minimum and
maximum pitch were left at -100 % and
+100 %.
Modify these settings until the speed remains con-
stant over the entire control travel between hovering
and climbing.
Adjustments for descending
Descent is adjusted so that the model descends from
forward flight at a great height while the pitch is com-
pletely pulled back. Set the minimum pitch (point "L")
so that the model descends at an angle of 60-70°. In
the graph of the "Pitch" display, move the vertical line
to point "L" with the pitch control stick, and corre-
spondingly change its value.
This picture only shows an example of
changes of the minimum pitch setting.
Once this flight response is achieved, adjust the value
for "Throttle min" (the value of point "L" in the graph
of the THR.CRV display) so that the speed neither in-
creases nor decreases. The coordination of throttle
and pitch is now complete.
Final important instructions:
Before starting the motor, make sure that the throt-
tle limiter is completely closed so that the carburettor
only reacts to the throttle trim lever.
Before starting the motor, make sure that the throttle
limiter is completely closed so that the carburetor only
reacts to the throttle trim control. If the carburetor is
opened too wide when the transmitter is turned on,
not only a visual and acoustic warning are generated
but also the automatic switch on of the RF module is
blocked. If the carburettor is open too wide or if the
speed controller is set too high, there is a danger that
the motor will start at a high speed once it is turned
on, and the centrifugal clutch will engage immediately.
You should therefore always
hold the rotor head
tightly when starting.
If the motor accidentally starts when the carburettor is
open too wide, always remember
do not panic!
Keep a firm grip on the rotor head!
Do not let go,
immediately turn down the throttle limiter even if there
is a danger of the drive becoming damaged since
you are responsible for ensuring
that the helicopter does not move
in an uncontrollable manner.
The cost of repairing a clutch, transmission or at the
motor are negligible in comparison to the injury and
damage that can arise from the rotor blades of a mod-
el helicopter flying around uncontrollably.
Make sure that no one else
is within the hazard zone of
the helicopter.
In addition, you should not switch from idling to the
flight setting while the motor is operating at a high
speed.