Elevons amplitude

Same parameters won't work the same if we change the type of the elevons we use. So if we try a different model of elevon we will notice that the amplitude has change. The amplitude of the elevons in FBWA mode can be changed using this parameters:

  • Mixing_gain
  • Tuning --> Servo Roll PID and Servo Pitch PID

If the plane doesn't fly because the elevons are different, don't worry, in these photos below you will see the amplitude of the wings the plane should have to fly properly without turbulence in FBWA mode. If your plane's wings amplitude is different try changing the parameteres I have mentioned until you get it.

Now we will see if the autopilot's stabilization works well. With this kind of control, the plane will try to fly always horizontal, so if the plane rolls left the control algorithm will move the left wing down and the right wing up to roll to the right and stabilize it. If the plane rolls right, the control will do the opposite. In the same way, if the plane goes up the control will move the wings down to stabilize it and to fly horizontal. For a good fly we should have those amplitudes when we roll and pitch the plane without moving the joysticks.

IMPORTANT: The control algorithm uses feedback of the sensors of the PXFmini, so it is really important to have the autopilot horizontal and well attached to the plane. Otherwise, the plane will crash.

  • Rolling the plane to the RIGHT with different angles:
PWM INPUTS
PWM INPUTS
PWM INPUTS
  • Rolling the plane to the LEFT with different angles:
PWM INPUTS
PWM INPUTS
PWM INPUTS
PWM INPUTS
  • Rolling the plane DOWN:
PWM INPUTS
  • Pitching the plane UP:
PWM INPUTS

Those parameters are not the perfect ones, so maybe with other amplitudes and other PIDs the plane will fly better. If you optimize them please share your results with us and we will try them.