RTL crash

I had a crash this morning, going to stabilize, Althold, loiter OK.
RTL after 10 seconds, motors off. Copter revolves around 180 degrees crash
who can explain me this log.
Thank you

your APM lost power, then the UAS crashed.
Usually, you could think it was a bad connection, but your VCC is very low over the whole flight, whatever regulator you are using to feed APM, it’s no good.


I’m only just getting into this and put together an Excel Macro to automatically investigate popular issues that I read about.

It detected your GPS signal is very weak, maybe its worth looking at before you fly again.

Number of sats is down to 7, HDop is greater than 2, i suspect another crash is on the way from what I have read.

Hope this helps