@jmillwood wrote:
I upgraded the firmware on my 3DR X8 to AC3.3.3. I uploaded the stock parameter file for the X8 and reviewed the settings. From what I could tell everything looked reasonable. On the flight day I was connected to Mission Planner as well. I powered up the X8 and did not see any errors in the "Messages" tab, there was a 3D gps fix, and the HDOP was bellow 2. Everything on the ground looked good. The person who was manning the controls is an experienced pilot and armed the motors and increased the throttle. The X8 was very wobbly, which was expected, we were doing this flight to tune it. The X8 started to drift to the west, the pilot tried to nudge the X8 back east. Then it started flying full speed to the west. The pilot said he had no control, as he was trying just about everything on the transmitter and there was no response, it was not turning, or slowing down. It ended up crashing full speed into a concrete wall and was pretty much obliterated.
Now I would like to figure out what went wrong because it was kind of scary but I also don't want to be stuck on old firmware.
The log entries I looked at were:
- GPS: Some people that have had fly ways seem to have had issues with gps. I looked at the "GPS Glitch" option in the "Review Log" tool in Mission Planner. There is variations but the number of sats is between 10 and 11 and HDOP is between constantly less than 1. So that doesn't seem to be the issue.
- Errors: I looked at the "Errors" option and there were none recorded.
- IMU: The IMUs seem to be pretty close in the IMU inconsistency plot option
- Attitude: I plotted the ATT desired pitch roll and yaw with the pitch roll and yaw. The pitch seemed alright, but there seemed to be some variation in the roll and yaw. I'm not entirely sure if that was after the crash or not or if the variation isn't that bad.
I don't really have a feeling for looking at the EKF stuff so I'm not sure what I'm looking for there.
Here is the log file from that day: 2016-05-11 09-50-44.bin (420 KB)Any pointers here would be greatly appreciated. Thanks!
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