GRAUPNER mx-16 HOTT, Programming Manual

Page: 46 / 180

46 Model helicopters
Model helicopters
Collective
Pitch Curve
Channel 1 Throttle
Channe
l 1 Tail Rotor
The continued development of model helicopters and
helicopter components, such as gyros, speed governors,
rotor blades etc., has led to the current position where
helicopters are capable of sophisticated 3-D aerobatics.
In contrast, if you are a beginner to helicopter fl ying, you
need a simple set-up so that you can quickly get started
on the initial stages of hovering practice, and then
gradually learn to exploit all the options provided by the
mx-16
HoTT.
The helicopter program of the
mx-16
HoTT can cope
with all current model helicopters equipped with 1 … 4
servos for collective pitch control, entirely regardless of
whether they are powered by a fuel-driven or electric
motor.
Each model memory can include three fl ight phases
plus auto-rotation.
Two timers are constantly included in the basic screen
display. At the same time the period which has elapsed
since the last charge process is also displayed.
You can return to the correct idle position for the digital
Ch 1 trim simply by pressing a button.
“Dual Rate” and “Exponential” are available for roll,
pitch-axis and tail rotor; they can be coupled together,
and programmed to provide two settings.
All the transmitter controls (CTRL) and switches (SW)
can be assigned to inputs 5 … 8 in virtually any order.
This is carried out in the “
Transmitter control settings ”
menu.
In addition to three linear mixers, which can be assigned
to any functions and can also be switched on and off,
the “
Helicopter mixers ” menu provides fi ve-point curves
for the collective pitch, throttle and tail rotor mixers,
variable separately for each fl ight phase; these provide
non-linear mixer characteristics.
1. Collective pitch
2. Ch 1
¼
throttle
3. Ch 1
¼
tail rotor
Such advanced features are not needed by the begin-
ner, who will initially simply set the hover point to coin-
cide with the centre point of the stick arc, and adjust the
collective pitch travel as required.
Moreover the “
Heli mixers ” menu offers two additional
set-up options in the lines “Gyro” and “Inp8”, plus a
“
swashplate limiter ”.
The mixer inputs for collective pitch, roll and pitch-axis
can then be adjusted in the “
Swashplate mixers ” menu.
The throttle limit function in the “ Transmitter control
settings ” menu provides an effective means of starting
the motor in any fl ight phase. By default the proportional
rotary control CTRL 7 is assigned to this input, and this
control function determines the maximum throttle servo
position, i. e. the trim lever controls the motor over the
idle range. Only when this rotary knob is turned in the di-
rection of full-throttle do the programmed throttle curves
take effect. If you have set up the two timers, they also
start recording the fl ight time automatically at this point.
See page 79 for more information on this.