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Description of transmitter – Digital trims
Digital trims
Description of function, and C1 cut-off trim
Digital trims with visual and audible indicators
Both the dual-axis stick units are fi tted with digital trim
systems. When you give the trim lever a brief push (one
“click”), the neutral position of the stick channel changes
by one increment. If you hold the trim lever in one direc-
tion, the trim value changes continuously in the corres-
ponding direction with increasing speed.
The degree of trim offset is also “audible”, as the pitch
of the tone changes to refl ect the setting. When you are
fl ying a model, you can fi nd the trim centre position ea-
sily without having to look at the screen: if you over-run
the centre setting, the trim stays in the centre position
for a moment.
The current trim values are automatically stored when
you switch from one model memory to another. The di-
gital trims are also stored separately for each fl ight pha-
se within a model memory, with the exception of the “C1”
(Channel 1) trim, which is the throttle / airbrake trim on a
fi xed-wing model.
The C1 trim includes another special function which
makes it easy to re-locate the idle throttle setting of a
glowplug motor.
2. Model helicopters
In helicopter mode the C1 trim has another feature in
addition to “cut-off trim”, as described under “Fixed-
wing models” on the left; this time in conjunction with the
“Throttle limit function” (see page 54): while the thrott-
le limit slider is in the bottom half of its travel, i.e. in the
“start-up range”, the C1 trim lever acts as idle trim on
the throttle limit, and the idle trim is displayed on the
screen:
In contrast to a fi xed-wing model aircraft, this display is
suppressed if the throttle limit control is moved to the
“upper” half of its travel.
Note regarding helicopters:
The C1 trim only affects the throttle servo and not the
collective pitch servos; it also works evenly over the full
stick travel. Please note that the helicopter throttle ser-
vo must be connected to receiver output 6 (see Receiver
socket assignment, page 33).
1. Fixed-wing models
The C1 trim features a special cut-off trim which is desi-
gned for glowplug motors:
You initially use the trim lever in the usual way to select
a reliable idle setting for the motor. If you now move the
C1 trim lever to its end-point in the direction of “motor
cut-off”, pushing the lever in a single movement, a mar-
ker appears on the screen in the last position. You can
now return to the idle setting for starting the motor simp-
ly by pushing the stick one click in the direction of “open
throttle”.
The cut-off trim feature is disabled if you enter “none” in
the motor line within the »Base settings« menu (page
38).
Last idle position
Trim at motor
OFF position
Current trim
position
C1 trim lever
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