FailSafe Disarm & Crash 400ft up... NOT GOOD, but could have been worse..

I have a general question on APM 2.5 Throttle Failsafe, and then will follow up with tlog, log files and OSD video later...

I have been flying a reliable 3DR Robotics Y6 on release 3.1 for several weeks and yesterday had a bad crash from 400ft up.  (F

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FAILSAFE / DISARM CRASH in Mid FLIGHT on APM 2.5 3.0 rc 5

Help!

 

My HEX crashed from a FAILSAFE / DISARM event in mid flight!

I have been successfully flying Quads & Hex's with previous firmware versions of Arducopter using APM 2.5 boards until Saturday afternoon's unexpected crash. For a long time I have bee

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