Hi community,
Sadly my quad crashed after 21 minutes of flying, everything seemed normal before it suddenly fell from the sky. I have been flying the quad for a total of 8 hours with more or less the same setup without any issues before. I was flying with altitude hold around 40m and in more or less at one position when the quad dropped from the sky. From what I see in the log a brownout occurred at altitude 11.73m, but from what I can understand the issue happen before the brownout. I suspect mechanical failure after reviewing the log. Battery status was at 32%
Video of the crash, it makes a strange sound right before it goes down:
[youtube]https://youtu.be/vr7nOH0is2Q[/youtube]
Log files (dataflash log):
https://drive.google.com/folderview?id=0BzWoDXwJ2f-kfjRJcXlPekxvX1FKUTV4emxPVzQwNE1ORHFqV0wtM0g2RlBQN0xQWG9mTHc&usp=sharing
Hardware information:
- Pixhawk PX4 2.4.6 (Firmware Version V3.2.1)
- UBLOX MIni NEO-M8N GPS GNSS + HMC5983 Compass Triple Band ANT (Primary GPS)
- UBLOX Micro MAX-M8Q GPS GNSS + HMC5983 +SAW +LNA+ Triple Band ANT (Secondary GPS)
- Power Module v5 - 90A
- Tattu 16000mAh 22.2V 15~30C 6S 1P Lipo Battery Pack (separated battery pack/circuit for fpv gear)
See the included txt for full specification list.
Log auto analyses output:
Test: Autotune = UNKNOWN - No ATUN log data
Test: Balance/Twist = GOOD -
Test: Brownout = FAIL - Truncated Log? Ends while armed at altitude 11.73m
Test: Compass = GOOD - mag_field interference within limits (9.07%) Max mag field length (597.11) > recommended (550.00)
Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERR found: GPS_GLITCH
Test: GPS = FAIL - GPS glitch errors found (1) Min satellites: 15, Max HDop: 1.53
Test: IMU Mismatch = GOOD - (Mismatch: 0.21, WARN: 0.75, FAIL: 1.50)
Test: Parameters = GOOD -
Test: PM = FAIL - 126 slow loop lines found, max 16.00% on line 730
Test: Pitch/Roll = FAIL - Roll (120.92, line 302416) > maximum lean angle (45.00)
Test: Thrust = GOOD -
Test: VCC = GOOD -
//Seiern