GRAUPNER MC-22S, Programming Manual

Page: 36 / 180

36 Model helicopters
Model helicopters
Collective
Pitch Curve
Swashplate
Rotation
Roll
Õ
Throttle
Pitch-Axis
Õ
Throttle
Channel 1
Õ
Throttle
Roll
Õ
Tail Rotor
Pitch-Axis
Õ
Tail Rotor
Channel 1
Õ
Tail Rotor
Channe
l 1
Õ
Tail Rotor
Tail Rotor Õ
Throttle
The continued development of model helicopters and
helicopter components, such as gyros, speed gover-
nors, rotor blades etc., has led to the current positi-
on where helicopters are capable of sophisticated 3-
D aerobatics. In contrast, the beginner to helicopter
fl ying needs a simple set-up so that he can quickly
get started on the initial stages of hovering practice,
and then gradually work up to more complex models
which exploit all the options provided by the mc-22s.
The helicopter program of the mc-22s can cope with
all current model helicopters equipped with 1 ... 4 ser-
vos for collective pitch control.
Each model memory can include three fl ight phases
plus auto-rotation (see »
Auxiliary switch «, » Phase
setting « and » Phase assignment « menus).
Four timers are constantly included in the basic
screen display.
The digital trim settings are stored separately for each
fl ight phase. You can return to the correct idle throttle
trim for Ch1 simply by pressing a button.
The transmitter control assignment for inputs 5 ...
8 can also be set separately for each fl ight phase
(»
Control adjust « menu).
During the test-fl ying phase the “Copy fl ight phase”
function can be particularly helpful (»
Copy / Erase «
menu).
“Dual Rate” and “Exponential” are available for roll,
pitch-axis and tail rotor, and they can be coupled to-
gether and programmed to provide two settings in
each fl ight phase.
You can set up four freely assignable linear mixers,
two curve mixers and two dual mixers, and they can
be switched on or off separately in each fl ight phase
in the »
MIX active / phase « menu.
Five-point curves are provided for the collective pitch,
throttle and tail rotor mixers, variable separately for
each fl ight phase, giving non-linear mixer characteri-
stics as often required for the roll and pitch-axis func-
tions. Independently of this feature, the control curve
for the Channel 1 stick can also be defi ned using fi ve
points, separately for each fl ight phase; this feature
is not available for fi xed-wing models. These advan-
ced features are not needed by the beginner, who will
usually start simply by setting the hover point to coin-
cide with stick travel centre.
Pre-programmed mixers in the » Helicopter mixer «
menu:
1. Collective pitch curve (with fi ve-point curve)
2. Channel 1 throttle (with fi ve-point curve)
3. Channel 1 tail rotor (with fi ve-point curve
4. Tail rotor throttle (with fi ve-point curve)
5. Roll throttle
6. Roll tail rotor
7. Pitch-axis throttle
8. Pitch-axis tail rotor
9. Gyro suppression
10. Swashplate rotation
The “throttle limit” function (Input 12 in the »Control
adjust « menu) provides an effective means of star-
ting the motor in any fl ight phase. By default the slider
connected to CH7 on the transmitter circuit board is
assigned to input 12, and this control function deter-
mines the maximum throttle servo position, i.e. the sli-
der controls the motor over the idle range.
If the slider is moved in the direction of full-throttle,
the programmed throttle curves then take effect.