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as, as appropriate, to specify a "heading-lock mode"
whereby, even within this pre-selection, gyro gain can
be reduced by a particular gain type for normal, slow
flight with maximum flight stabilization, fast circuit
flights and aerobatics.
To proceed as described above, use flight phase
switching to enter different settings on the "Gyro
offset" line. Values between -125 % and +125 % are
possible:
Nick
Throttle
Nick
Tail
Gyro suppress
Gyro gain
Swash rotation
nor mal
Based on these flight-phase specific (offset) settings,
gyro gain can also be infinitely varied by a transmit-
ter control assigned in the "Gyro" line of the »Control
adjust« menu, page 126.
Swash rotation
Nick
Throttle
Nick
Tail
Gyro suppress
Gyro gain
Swash rotation
nor mal
Some rotor head control systems make it necessary
to incline the swashplate in a different direction from
the intended inclination of the rotor plane when a
cyclic control command is given. If your model fea-
tures a four-bladed main rotor, for example, you may
need to use this menu to set up a software-driven 45 °
rotation of the control linkage to the right, so that the
pushrods from the swashplate to the rotor head can
be set exactly vertical, ensuring that the blade control
system works correctly, without unwanted differential
effects. This eliminates the need to make mechani-
cal changes to the control linkages. Negative angles
equate to a virtual rotation of the rotor head to the
left; positive angles a virtual rotation to the right.
Swash limiter
Nick
Gyro suppress
Gyro gain
Swash rotation
0%
Swash limiter
0%
0%
0%
This function works like a circular mechanical sur-
0°
round acting upon the stick which controls the swash-
SEL
plate, restricting the normally square stick travel to
a circular range. In fact, if the helicopter is set up in
such a way that the deflections for roll and/or pitch-
axis exploit the maximum travel mechanically pos-
sible, e. g. for 3D helicopters, then the total tilt applied
to the swashplate if full roll and pitch-axis commands
are applied simultaneously will be considerably
greater (141 % in numerical terms). The swashplate
0%
mechanism may then strike its end-stops and, in the
0%
worst case, the ball-links could even be disengaged.
0%
mc-16
The
HoTT and
0%
contains a configurable software function for limiting
0°
the total swashplate travel, i. e. it restricts the tilt angle
SEL
of the swashplate from 100 % (the travel is limited
to the value obtainable either with roll or pitch-axis
alone) to 149 % (no effective limit). In addition, the
function can be set to "Off" and hence completely
deactivated. The swash limiter can also be configured
per model and per flight phase.
This software solution is therefore much more flexible
than a physical circular surround attached to the stick
unit: the latter can, in any case, only be used if the roll
and pitch-axis functions are controlled by a common
stick unit.
Tail
0%
0%
0%
0°
OFF
normal
SEL
mc-20
HoTT transmitter
The adjacent sketch illustrates the effect for a 100 %
setting. The cross-hatched area of travel is curtailed
and appears as a "dead zone"..
If this function is used,
"Dual Rate" should be
set to 100 % and Dual
Rate values above 100 %
should also not be used. If
not, and you set a swash-
plate limit of 100 %, for
example, then swashplate
movement will be restrict-
ed even if roll and pitch-
axis commands are given separately.
Setting range: 100 ... 149 % and "off".
You can reset an altered value to "OFF" by simultane-
ously pressing the or buttons of the right-
hand four-way button (CLEAR) in the active (high-
lighted) field.
Program description - Helicopter mixer
197
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