Thank you for letting us se FlightLogs from this strange case. There are a lot of issues:
- Copter switched to Manual mode. I don't know how Manual mode will be switched on at H plus with the new firmware, but I guess it was not the pilot who has done this accidently. The only reason is that GPS stops working without reason (HW error?).
- Copter did not response on RTH at all, strange.
- The values from accelerator are nonsense at the end. This may the reason for the for the "CRITICAL NAVIGATION FAILURE". In tas as well as in hSpeed the values goes up to 45m/s while coordinates and time interval say ~13m/s. Values from accelerator shows some kind of saw tooth, never seen this before.
- From 12:12:48 on there is no more reaction on the stick movement by the copter, before it is.
- Copter flies away with around 13m/s. The speed remains relative constant. But pitch, roll are near zero???
- There is a gap in the telemetry for 7sec. Sensor file says RC lost for 4sec. I would expect it loiter during this time, but inside this 7sec gap it took 97m --> 13,8m/s, same speed without a stop.
View attachment 11192View attachment 11193
You can 'play' the flight in GoogleEarth by Telemetry00098.kml
Here are the messages from Sensor file:
D:\temp\FlightLog_JackMTaco\Sensor\Sensor_00107.txt
88 CRITICAL: MANUAL CONTROL LOST : 4,change to auto loiter
226 INFO: (3,27)FUSE OPTICAL FLOW
227 INFO: (3,26)ANGLE MODE
1628 CRITICAL: CAUTION: Avionics power low: 4.66 Volt
1629 INFO: Armed by RC.
1640 INFO: [logger] file: /fs/microsd/log/2018-09-02/17_11_0
1720 INFO: (3,14)home: 39.2060390, -77.2675487, 153.45
1723 INFO: (3,25)SPORT MODE
1754 INFO: Takeoff detected.
2565 INFO: (1,7)Warn geomagnetic field is disturbed.
2948 EMERGENCY: CRITICAL NAVIGATION FAILURE - CHECK SENSOR CALIBR
2952 CRITICAL: Failsafe enabled: no local position
2953 INFO: Failsafe mode on.
2954 CRITICAL: No valid position. Switching to manual mode
3425 INFO: (1,7)Warn geomagnetic field is disturbed.
3690 INFO: (3,26)ANGLE MODE
3691 INFO: Failsafe mode off.
3694 CRITICAL: Failsafe enabled: no local position
3695 INFO: Failsafe mode on.
3696 CRITICAL: No valid position. Switching to manual mode
3779 INFO: (1,7)Warn geomagnetic field is disturbed.
3927 INFO: (3,51) BEGIN TO RTL
3928 INFO: Failsafe mode off.
3931 CRITICAL: Failsafe enabled: no global position
3932 INFO: Failsafe mode on.
3933 CRITICAL: No valid position. Switching to manual mode
4241 INFO: (1,7)Warn geomagnetic field is disturbed.
4643 INFO: (3,26)ANGLE MODE
4644 INFO: Failsafe mode off.
4646 CRITICAL: Failsafe enabled: no local position
4647 INFO: Failsafe mode on.
4648 CRITICAL: No valid position. Switching to manual mode
4848 INFO: (3,51) BEGIN TO RTL
4850 INFO: Failsafe mode off.
4852 CRITICAL: Failsafe enabled: no global position
4853 INFO: Failsafe mode on.
4854 CRITICAL: No valid position. Switching to manual mode
4980 INFO: (3,26)ANGLE MODE
4982 INFO: Failsafe mode off.
4983 CRITICAL: Failsafe enabled: no local position
4984 INFO: Failsafe mode on.
4985 CRITICAL: No valid position. Switching to manual mode
6728 INFO: (3,51) BEGIN TO RTL
6732 INFO: Failsafe mode off.
6733 CRITICAL: Failsafe enabled: no global position
6734 INFO: Failsafe mode on.
6736 CRITICAL: No valid position. Switching to manual mode
7130 INFO: (3,26)ANGLE MODE
7131 INFO: Failsafe mode off.
7132 CRITICAL: Failsafe enabled: no local position
7133 INFO: Failsafe mode on.
7134 CRITICAL: No valid position. Switching to manual mode
7135 INFO: (3,25)SPORT MODE
7136 INFO: Failsafe mode off.
7137 CRITICAL: Failsafe enabled: no local position
7140 INFO: Failsafe mode on.
7141 CRITICAL: No valid position. Switching to manual mode
7573 INFO: (1,7)Warn geomagnetic field is disturbed.
7763 INFO: (3,26)ANGLE MODE
7764 INFO: Failsafe mode off.
7767 CRITICAL: Failsafe enabled: no local position
7768 INFO: Failsafe mode on.
7769 CRITICAL: No valid position. Switching to manual mode
7770 INFO: (3,51) BEGIN TO RTL
7771 INFO: Failsafe mode off.
7773 CRITICAL: Failsafe enabled: no global position
7774 INFO: Failsafe mode on.
7775 CRITICAL: No valid position. Switching to manual mode
8096 CRITICAL: MANUAL CONTROL THE INTERRUPTION(at t=152203ms). 2:32,203 from boot time
8099 CRITICAL: MANUAL CONTROL LOST : 12,change to auto loiter delta 1,202 sec
8163 CRITICAL: MANUAL CONTROL THE INTERRUPTION(at t=153405ms). 2:33,405 from boot time
8164 CRITICAL: MANUAL CONTROL LOST : 12,change to auto loiter
8346 CRITICAL: (1,62)MANUAL CONTROL LOST : change to rc lost sta
8347 CRITICAL: No valid position. Switching to manual mode
8382 INFO: (3,63)Manual control regained after 4091ms. 4,1 sec
8383 CRITICAL: No valid position. Switching to manual mode
8427 CRITICAL: MANUAL CONTROL THE INTERRUPTION(at t=157751ms). 2:37,751 from boot time
8428 CRITICAL: MANUAL CONTROL LOST : 12,change to auto loiter delta 0,843 sec
8477 CRITICAL: MANUAL CONTROL THE INTERRUPTION(at t=158594ms). 2:38,594 from boot time
8478 CRITICAL: MANUAL CONTROL LOST : 12,change to auto loiter delta 13,945 sec
9281 CRITICAL: MANUAL CONTROL THE INTERRUPTION(at t=172539ms). 2:52,539 from boot time
9282 CRITICAL: MANUAL CONTROL LOST : 12,change to auto loiter
9748 MAVlink Datensätze
View attachment 11197
From my point of view this is a system error and Yuneec needs to replace it.
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