JCOMMAIRFORCE
lvl.1
United States
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lmcindoe Posted at 1-21 15:52
Hi Jim, we unfortunately had a crash due to loss of control immediately after take off (1 metre off the ground) in late December (after update). DJI completed the repair on our M210, but refused to look at the log files as it was out of warranty. Looking at the log files ourself (which we are not experts at!) there is definitely a voltage drop, then regain in one of the battery cells immediately prior to loss of control. Seems like a battery issue, but as I mentioned, DJI have not come to the party to help with any analysis (not even as a paid option). This is frustrating for us, as how do we answer the question "will it happen again" when we don't know why it happened in the first place?
Can you give more detail on your crash event? Were you taking off or did the aircraft take off on it's own? How high did it go? Did is move laterally or just go straight up and stop?
We had a strange event occur last week with our 210. We started the drone and then the controller. The controller prompted for the DJI account login, which we assumed was because the app was updated the last time the drone was updated. While logging into DJI, the drone suddenly started and lifted about one foot off the ground. It travelled about 7 or 8 feet where it crashed into a vehicle. We are unsure if the drone actually moved laterally or just drifted since the window was blowing at 8 to 10 mph. We are not even sure that the controller had connected with the drone because we never got past the login process before the drone took off. The only unusual circumstance about the flight is that it was only 5 degrees outside, although the drone was only outside for about three minutes and therefore could not have been cold. We were flying at a large fire scene in a neighboring county and the plan was to fly for a short time with attention being paid to the battery levels due to the cold.
Following the crash, there was no record of the flight on the controller. We are sending the onboard SD card data to someone for evaluation tomorrow. We are really curious if there was a severe voltage drop and we are completely puzzled how the aircraft could take off without any controller function since it wasn't logged in and may not have ever been connected.
Any help or comment is welcome. |
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