Fixed Wing VTOL

Hello, Iā€™m new to PX4 autopilot.

And, I wanted to know the following related to TECS algorithm:

  1. How the fallback based on underspeedā€¦block works ?

  2. Switch related to Tmax, logic ?

  3. How this algorithm works when Iā€™m flying at a constant speed and constant altitude.

Thank you in advance.