GRAUPNER mc-16 Programming Manual page 194

Swash limiter
Nick Tail
Gyro suppress
Gyro gain
Swash rotation
Swash limiter
nor mal
This function works like a circular mechanical surround
acting upon the stick which controls the swashplate,
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 possible, e. g. for 3D
helicopters, then the total tilt applied to the swashplate
if full roll and pitch-axis commands are applied simulta-
neously will be considerably greater (141 % in numeri-
cal terms). The swashplate mechanism may then strike
its end-stops and, in the worst case, the ball-links
could even be disengaged.
The mc-16 HoTT and mc-20 HoTT transmitter
contains a configurable software function for limiting
the total swashplate travel, i. e. it restricts the tilt angle
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.
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
194 Program description - Helicopter mixer
not be used. If not, and you set a swashplate limit of
100 %, for example, then
0%
swashplate movement will
0%
be restricted even if roll and
0%
pitch-axis commands are
0°
given separately.
OFF
Setting range: 100 ... 149 %
SEL
and "off".
You can reset an altered
value to "OFF" by simulta-
neously pressing the 
or  buttons of the right-hand four-way button
(CLEAR) in the active (highlighted) field.