Order Numbers
F4090 - F4091 - F4092
F4095 - F4096 - F4097
This means that two different transmitter controls with different
mixer values can influence a single servo.
A further application arises in conjunction with modern gyro
systems, which tend to increase or reduce servo travels.
This can be corrected by setting an appropriate value for transmit-
ter control travel; the value you set affects the pirouette speed of a
model helicopter.
Another possible use for this function is to reduce the transmitter
control travel to 0%; this disables the transmitter control comple-
tely, and the channel can then be used for a mixer (V-mix) without
running the risk that an accidental movement of the transmitter
control has an unwanted effect on the model.
The selected channel is indicated by a small arrow under the row of
numbers at the top of the screen.
Adjustments affect all the mixed channels which are affected
by the transmitter control channel in question.
In the example shown
here any adjustment
made will affect the
transmitter control tra-
vel for the 1st channel;
this applies to model
number 10.
The arrow indicates which direction can currently be programmed.
The side can be changed by moving the associated transmitter
control.
In the case of the horizontal transmit-
ter controls the arrow indicates right
and left. With the vertical control
functions the arrow indicates up and
down. Press the "S" or "H" button to
select a different channel.
Rotate the 3-D hotkey to adjust the
travel as a percentage value from 0 to
100%.
Holding the 3-D hotkey pressed in for
one second resets the value to the
default setting (100%).
7.8 Dual Rates - switchable reduced travels (D/R)
The Dual Rates facility allows the pilot
to select different control travels
during a flight simply by operating an
external mixer switch. You can set up
the function so that the switch selects
either larger or smaller travels when
you switch Dual Rates on.
If no switch is assigned, the D/R function can be used as a means of
setting permanent travel reduction which affects both sides of cen-
tre equally.
In this case it affects the servo channel corresponding to the trans-
mitter control you select, and also all other functions which are
affected (through mixers) by the same
transmitter control
.
Other mixed signals which affect the same
servo output
are not
affected, in contrast to standard servo travel limiting.
The external mixer switch should be connected to socket 4 (see
illustration in Section 4.7). A single switch can control 1, 2 or 3
functions.
This is achieved by setting up the switches in the PARA/DRSW
menu (see also "PARA" menu, Section 7.1.5).
The graph shows the characteristic curve of the different control tra-
vels. Note that the response is linear in both cases.When Dual Rates is
selected, the servo travel at full stick deflection is only 60%.
This option is available for the three primary control surface functions:
aileron, rudder and elevator.
The top part of the screen displays the functions to which travel
reduction can be applied. The arrow below the numbers indicates
which function is currently selected.
Press the "S" button to select the next
function. The flashing "%" symbol
shows that adjustment is possible;
rotate the 3-D hotkey to set the value.
Turning the 3-D hotkey to the left redu-
ces the control travel; turning it to the
right increases the value. The screen
displays the control travel you have set
in the form of a percentage number
between 0 and 100%.You can return to
the default setting (100%) by holding
the 3-D hotkey pressed in for about
two seconds.
For reasons of safety you should never reduce the Dual Rates
value to 0%, as this would give you no control at all for that func-
tion.We recommend 20% as the safe minimum value.
The exception to this rule is the case where you deliberately
assign no function to a particular transmitter control, should you
wish to use this channel to carry a self-generated mixer function
(V-MIX).
7.9 Exponential function (EXP)
The "EXPO" function affects the charac-
teristic curve of the transmitter sticks,
i.e. the linear association between stick
travel and servo travel is changed to a
non-linear (exponential) curve. The
basic purpose of EXPO is to provide fine
control of the model around the neu-
tral position.
The top part of the screen displays the
transmitter controls 1…4, for which
EXPO is available.
The arrow below "1" indicates that it is
currently possible to alter the setting
for transmitter control 1. The % symbol
flashes to show that the value can be
changed.
20
Transmitter control travel
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