I have eliminated a fair amount of mechanical problems. I could use some help trying to figure out why this bird took a nose dive after more than 24 successful missions.
Log File C:\Users\thear\AppData\Local\Temp\tmp4AD4.tmp.log
Size (kb) 52167.8056640625
No of lines 527443
Firmware Version V4.0.5
Firmware Hash 0bfa2638
Free Mem 0
Skipped Lines 0
Test: Autotune = NA -
Test: Brownout = GOOD -
Test: Compass = FAIL - WARN: Large compass offset params (X:-43.85, Y:-135.90, Z:312.92)
WARN: Large compass offset in MAG data (X:-43.00, Y:-135.00, Z:312.00)
Large change in mag_field (251.04%)
Max mag field length (561.65) > recommended (550.00)
Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = GOOD -
Test: GPS = GOOD -
Test: IMU Mismatch = GOOD - (Mismatch: 0.53, WARN: 0.75, FAIL: 1.50)
Test: Motor Balance = NA -
Test: NaNs = FAIL - Found NaN in POS.RelOriginAlt
Test: OpticalFlow = FAIL - FAIL: no optical flow data
Test: Parameters = GOOD -
Test: PM = NA -
Test: Pitch/Roll = NA -
Test: Thrust = NA -
Test: VCC = UNKNOWN - No CURR log data
Mission starts at the 79% mark.
FOUND: One motor on the right wing had a motor that was binding. Unknown if that was a problem before or after the crash.
She had a funky takeoff to 150ft, I chalked it up to crosswind and a change in magnetic declination. She had her accelerometers calibrated before takeoff but not her magnetometers. I do not recall doing a reboot but I might have. No errors were displayed at takeoff.
She went to 150ft, transitioned and then went 20degs down until she hit the ground at higher than her max allowed speed when in auto. She did not appear to respond to max up elevator I was giving her during the downward decent.
I’m pretty sure its not a mechanical failure, it might have been an ESC failure as the left wing caught fire. The battery was deformed but not punctured and it did not ignite (fire was from ESC). I can’t see anything in the logs that would prove this though.
I am open to all suggestions!!
I have uploaded params, .bin, .tlog and a few photos.
Firmware Version V4.0.5 on the Cube Black
Mission Planner version 1.3.73 build 1.3.7530.26934