@wilsonchang wrote:
Guys,
Several days ago, my quadcopter (PIXRACER loaded latest stable 352) crashed.
I have been flying this copter for nearly more than half year, but with 3.4.X firmware, it flied well.
days ago, I changed the received RC and receiver with SBUS, the copter became trembling, so, I decided to use auto-tune to calibrate the PID.I connected the copter to missionplanner and was told there are new firmware and I reinstalled the 'latest stable' 352.
I was so confident with the copter (because I already used it long time and now its latest stable firmware), I after I finished necessary setup the next day I take off directly in Atl-Hld Mode.
the copter trembling and ascending quickly, I was so terrified that I switched off RC to triggle RTL
from tele I saw the copter changed to FAILFAFE mode but it keep ascending and soon it dispeared .later from tele-log, I knew it ascend to about 914 M !!! and lost altitude to 415M and dropped and crashed. FORtunally I crashed to a reservoir
there days I think about it, the problem may because of big viberation....
what I feel bad is why "this old but dangerous problem" still not solved....
t
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