Can a plane fly in assist mode or auto mode without airspeed sensor?

PX4 Autopilot Fixed Wing 🛩️
1

Assist mode includes altitude mode, position mode
My plane have no airspeed sensor, the push motor only work in manual/stabilze mode.
When i switch to altitude mode, the push motor stops.
Can any body help me?

2

i had this happen to me (tractor motor) when i accidentally reversed the PWM main out for the throttle. It was easy to find, in my case, because my RC xmitter stick for throttle was backwards (up/stop, down/full).

3

have you seen this parameter?
.
FW_ARSP_MODE (INT32) Airspeed mode

Comment: For small wings or VTOL without airspeed sensor this parameter can be used to enable flying without an airspeed reading

Values:

  • 0: Normal (use airspeed if available)
  • 1: Airspeed disabled
4

Thanks a lot.
I will set FW_ARSP_MODE to 1
and test it later outdoor, maybe GPS lock is needed.