SITL airspeed sensor failure

ArduPlane
1

There are three parameters to simulate airspeed sensor failure:

  1. SIM_ARSPD_FAIL
  2. SIM_ARSPD_FAILP
  3. SIM_ARSPD_PITOT

What are the differences?

From my observations, setting:

  1. SIM_ARSPD_FAIL to 1 results in airspeed sensor readings set to 0 m/s.
  2. SIM_ARSPD_FAILP to a value different from 0 results in airspeed sensor readings set to some high value (in my case >350 m/s). Despite the fact, that the documentation says the units in this parameter are Pascals…
  3. SIM_ARSPD_PITOT to a value different from 0 does not cause any change in the simulation.