GRAUPNER mx-20 Hott, Programming Manual

Page: 174 / 296

174 Detail program description - Control adjust
that the defl ections for roll and/or pitch-axis exploit the
maximum travel mechanically possible, e. g. for 3D helis,
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 mechanism may then strike its end-
stops and in the worst case the ball-links could even be
disengaged.
The
mx-20
HoTT transmitter contains a confi gurable
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
confi gured per model and per fl ight phase.
This software solution is therefore much more fl exible
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 sketch shown alongside
illustrates the effect when set
to 100%: 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
swashplate limit of 100%, for example, then swashplate
movement will be restricted even if roll and pitch-axis
commands are given separately.
Adjustment range: 100 ... 149% and "Off".