191
Program description - Helicopter mixer
screen for curve settings with a brief tap on the centre
SET key of the right touch pad, see description below.
The curve is set up basically in the same way as the
Channel 1 curve for helicopters, but we will describe
it again here in detail using pitch configuration as
an example, to save you having to leaf through the
manual.
In the remaining lines, first activate the value field and
then use the selection keys of the left or right touch
pad to set a mixer value in the value field (inverse
video).
The settings available are rounded off with the
"Swashplate limiter" option: This option can be set to
restrict maximum deflection of the swashplate servo
in the sense of a limiter. Together, these settings con-
figure the basic set-up of the helicopter model.
In the "Autorotation" flight phase as described on
page 106, however, the mixers "Channel 1 Throt-
tle" and "Channel 1 Tail rot" are not needed and
therefore switched to a configurable default value.
Changed parameters can be reset to their respective
default values at any time with a simultaneous tap on
the or keys of the right touch pad (CLEAR).
Pitch (Pitch curve (Channel 1 Pitch))
If necessary, use the selection keys of the left or
right touch pad to move to the "Pitch" line then tap
briefly on the centre SET key of the right touch pad.
Pitch
Curve
off Point
Output
Input –50%
–50%
?
+
–
100
O U T P U T
0%
Normal
Unlike the »Channel 1 curve« menu, this display is
only associated with the control curve of pitch ser-
vos, whereas the "Channel 1 curve" affects all servos
controlled by the throttle/pitch stick.
Note that the output signal of the "Channel
1 curve" option thus functions as an input
signal for the collective pitch curve pro-
grammed here: In the graph, the vertical line is
synchronized with the throttle/collective pitch stick
and therefore follows the current Channel 1 curve
characteristic.
The control curve can be defined (separately per
flight phase) by up to 8 points, termed "reference
points", placed at any point along the stick travel.
Initially, however, fewer reference points are adequate
for setting up the collective pitch curve. We recom-
mend beginning with three reference points to start
with. These three points, namely the two end-points
"Pitch low (L)" (= -100 % control travel) and "Pitch
high (H)" (= +100 % control travel) plus a point at the
centre of control travel still to be set, define an initially
linear profile for the pitch curve.
Programming details
First, switch to your chosen flight phase, e. g. «Normal».
The throttle/collective pitch stick is used to move the
vertical line in the graph between the two end-points
"Point L" (minimum pitch at -100 %) and "Point H"
(maximum pitch at +100 % control travel): at the same
time, the current stick position is shown numerically
on the "Input" line (-100 % to +100 %).
The point at which the vertical line crosses the curve
is termed the "Output", and can be varied at the maxi-
mum of 8 reference points within the range -125 % to
+125 %. A control signal modified in this way affects
only the collective pitch servos.
In the example to the left, the stick is at exactly 0 % of
control travel and also generates an output signal of
0 %, since the characteristic curve is linear.
Up to six additional reference points can be set be-
tween the two end-points "L" and "H", although the
distance between neighboring reference points must
not be less than approx. 25 %.
Setting reference points
Move the stick. If the display shows a framed question
mark, then you can set the next reference point with
a tap on the centre SET key of the right touch pad.
Simultaneously, the "?" is replaced by its number and
the value field to the right of the reference point num-
ber is highlighted:
Pitch
Curve
off Point
Output
Input 0%
0%
1
+
–
100
O U T P U T
0%
Normal
1
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