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X20/X20S and Ethos v1.2.10 User Manual
Idle Up 1 is used for most flying. The straight line curve means that we will have a
constant throttle setting to keep the rotors spinning at a steady rate. The final throttle
value may need to be determined in flight. The helicopter’s motion will be controlled
by the Collective Pitch and Aileron (roll) and Elevator (pitch) controls.
Note that there should not be a big jump between Normal and Idle Up 1, so the
transition happens smoothly.
Note also that most FBL units offer a Governor function, which ensures that rotor
speed is kept constant even during aggressive flying manoeuvres. Please refer to the
Spirit FBL manual for details.
Idle Up 2 curve
Idle Up 2 is used for more aggressive flying, for example aerobatics and 3D. The final
throttle value may need to be determined in flight.
Throttle mix setup
Throttle curves
We can now configure the Throttle mix for the three throttle curves, controlled by
the flight modes.
191
rev 3
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