On rare occasions, usually when using a Futaba transmitter, it has been found that the
throttle channel sense of movement may require reversing (Servo reverse) and repeat the
transmitter alignment.
Correct reading of throttle % by the FADEC can be verified in the second screen,
percentage of the throttle position is shown on, 0% in the position of engine stop (trim and
stick down), 100% with stick/trim full up and between 10% and 30% at idle.
This now completes your radio setup and should only need doing again if the radio settings
in the TX are changed.
Throttle curves.
By default the FADEC control the RPM in linear way, i.e., at half stick position the engine
turn at half of the rotor RPM range. Jet engines develop the thrust in exponential mode,
thus half RPM means approximately ¼ of thrust. On small engines with a high idle to full
power rpm ratio, or in a high drag/low power planes, often only the last 1/3 of the throttle
stick produce significant thrust, with the low half stick travel being not used. Although
that with current digital TX the pilot can modify the throttle curve to suit his needs,
three throttle curves have been added to simplify the setup for most of the installations:
FULL EXPO: Mean linear RPM, it is the default setting and the mode used for all previous
software versions. Thrust develops exponentially, and it is the recommended curve for big
engines or/and high thrust/weight ratio planes, as it ease the control in low power used
during taxi.
LINEAR: Mean that the thrust develop linearly with the throttle setting. Could cause
difficult taxi, as it would be difficult to fine adjust the power at low settings.
HALF EXPO: An intermediate setting between the other two modes.
Stick position
MODE
0% (Idle)
25%
50%
75%
100%
FULL EXPO
Idle thrust
6%
25%
56%
100%
HALF EXPO
Idle thrust
16%
38%
66%
100%
LINEAR
Idle thrust
25%
50%
75%
100%
% of total
thrust
Throttle curves can be changed while the engine running, so you can leave the throttle at a
given position and switch between the curves to see the difference.
Info and test screens.
This submenu contains several screens that provide useful information and tools to get the
maximum information on your system and to aid to correct any malfunction.
Running Time Counter.
This screen contains a timer which shows:
