FES Discus 2c - Page 22

FES Flight Manual, v1.18 May 2020
Page 22 of 35
4.5.8.1 Stopping the propeller with electronic braking
To stop the propeller with the electronic brake, you need to rotate the throttle in the
counter-clockwise direction until you set it 1 step away from zero power when the throttle
line on the display starts blinking red!
Note: To successfully stop the motor, it must reach around 1500 RPM;
otherwise braking will not work, due to insufficient induced voltage.
Propeller brake uses the regeneration function of the controller.
In the air, there is enough RPM in most cases. But if you want to test
electronic braking on the ground, make sure you set at least 1500 RPM, and
then rotate the throttle knob quickly in a counter-clockwise direction!
4.5.8.2 Propeller positioning
1. FES installations without automatic positioning:
If the propeller stops in a position where you can see one of the blades through the
canopy, just start the motor again to around 1500 RPM and then stop it again.
Repeat this procedure until blades are positioned in a suitable position!
2. FES installations with automatic positioning:
If your FES system has automatic propeller positioning, the electronics will rotate it
in a horizontal position.
After the electronic brake stops the motor, the automatic positioning will start after
2-3 seconds. You can always interrupt automatic positioning by pushing the throttle
knob.
Note: Automatic positioning will not work if canopy message is active, or if
the throttle is set to zero power instead of braking!
It is possible to adjust the following paramters in settings:
- the time between steps from 50ms to 1 sec;
- power used for positioning at 115V and 90V
number of steps after the hall sensor detects the reference position of the
propeller