Hi everybody

I had encountered a serious problem yesterday. When I switched to RTL on CH8 at 13:08:34, then the multicopter started to roll on the right side. Don't know why how it happened. I had performed RTL function over 5 times. It should be fine I think. Can anyone tell me what's wrong? I have no idea of it.

Any suggestion will be very appreciated.


Airframe: Hex

Model: APM 2.6

Firmware: V3.1.5

Optional hardware: 433MHz Radio Telemetry

RC Transmitter/Receiver: Taranis X9D 2.4G / X8R

Ground Station: Mission Plannner 1.3.10


Log File C:/Program Files (x86)/Mission Planner/logs/Download_From_APM2.6/2015-01-03 12-59-56.log
Size (kb) 1021.0810546875
No of lines 14692
Duration 0:08:42
Vehicletype ArduCopter
Firmware Version V3.1.5
Firmware Hash 3c57e771
Hardware Type APM 2
Free Mem 982
Skipped Lines 0

Test: Autotune = UNKNOWN - No ATUN log data
Test: Balance/Twist = GOOD -
Test: Brownout = GOOD -
Test: Compass = GOOD - No MAG data, unable to test mag_field interference

Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERR found: CRASH
Test: GPS = FAIL - Min satellites: 4, Max HDop: 8.63
Test: Parameters = GOOD -
Test: PM = GOOD -
Test: Pitch/Roll = FAIL - Roll (164.83, line 14517) > maximum lean angle (45.00)
Test: Thrust = GOOD -
Test: VCC = WARN - VCC min/max diff 0.321v, should be <0.3v


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maybe I'm too late but I would blame this line:

Test: GPS = FAIL - Min satellites: 4, Max HDop: 8.63

With this high HDop value and that low number of satellites it is definitely not recommended to use any GPS based flight modes.


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