@X1Aero wrote:
I've got a 960mm hex with 18" props and 288kv motors that went crazy today. It's been flying 3.4 since it was released for beta and flew great. I notice the tuning could be better so I thought I do another autotune to see if it would tighten up. Barely got a foot off the ground before it did a complete front flip. Snapped the gear off and broke two propellers, so no too bad. But man, it was violent! I had made two changes to the unit. First I swapped the old 3DR GPS for a new Ublox Neo-M8N GPS. I did this exact swap on my 680X8 and it works great, same GPS unit. The other change was changing the ATC_RAT_RLL_FILT and ATC_RAT_PIT_FILT to 10hz instead of 20 (recommended for larger units autotuning). Again, did this on the 680mmX8 with a great autotune. Another funny thing, there's no error or crash error in the logs but the parachute fired! 2016-08-30 15-48-53.bin (250.6 KB)
Just noticed something else odd. Playing back the Tlog, the radio telem never get better than 47%. It's a RFD900 on both sides. Never seen anything less than 95% at 1000m let alone 45% at 4m lol! Also noted the EKF monitor doesn't go nuts until it's finished it's front flip.... Wow, any help would be greatly appreciated.
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