FW crash v1.7.0-rc2

[r0gelion]

Phantom flying wing with Pixhawk mini autopilot running v1.7.0-rc2 (V3).

After 6 successful flights, during the 7th flight, the pilot took off in manual mode, switched to Auto and the plane accelerated to maximum thrust uncontrollably; once switched back into manual the pilot reported only partial control, attempted to land manually but crashed due to the vast acceleration and only partial control over the craft.

Log

Video

@dagar

[dagar]

I saw this log a couple days ago. The major thing that stands out is that the pitch demand is being ignored. There's also a sizable roll offset.

The other minor thing is that the maximum roll max is set to 0 (unconstrained). Resetting to the default should be fine.

How badly damaged was the vehicle? I suspect some kind of mechanical failure. Servos, linkages, control surfaces, or possibly even the battery coming loose and moving around.

[bresch]

@r0gelion Link of the log is broken. Could you update it please? Server is down; let's wait.

[bkueng]

@bresch Works again. Sorry I messed up an upgrade.

[bresch]

@bkueng Thanks!

[acfloria]

@r0gelion It is probably not related to the crash but which airspeed sensor are you using?
I am asking because this value is quite high: SENS_DPRES_OFF, 122.68370819091797

[r0gelion]

@acfloria this is the airspeed used.

Thanks!

[dagar]

@acfloria in my experience that's a pretty typical offset for an MS4525.

[dagar]

Most likely mechanical failure.