Labroides
Core User of DJI
Flight distance : 9991457 ft
Australia
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I anylyze that the batter voltage was too short, and sensor issues. The drone was flying in 10mph wind which triggered a sensor and I got a total of 52 "flight warnings" which were deemed by me irrelevant and false. I have came to the conclusion it was NOT human error.
Here's the story that the flight data tells about the flight.
It's not pretty.
You had already flown on the battery and launched again with the battery showing 61%.
I wonder which firmware version you had because at 8:15.1 with the drone 97 feet up, you applied full throttle for 3 seconds and the drone failed to climb.
After you released the joystick, the Mini started to slowly descend.
Full throttle at 8:22.6 and 824.7 failed to stop the slow descent.
This altitude instability and uncommancded descent was a problem early on with the Mini but fixed with Firmware version 1.0.5.
While this was happening, the drone was being blown slowly toward the east on a course of approx 100 degrees which gives an idea of the wind direction.
There's a lot more altitude instability and uncommanded descending after this.
At 8:36 the uncommanded descent stopped and the drone responded sluggishly to full throttle, climbing quite slowly.
At 9:57.6 you tried to climb with full throttle but the drone failed to respond and descended.
It only started to climb at 10:05.2 and climbed very slowly despite full throttle.
You initiated RTH at 10:30.3 with the drone 340 ft from home and 105 ft up.
You soon cancelled and went to Sport Mode and flew some loops backwards at full speed.
At 11:18 the battery level was 27% and the drone was 335 feet away.
You started flying backwards in Sport Mode toward home and took the drone up to 146 ft.
With full stick in Sport Mode, the drone was having trouble fighting the wind and only going slowly.
You turned the drone around and at full stick it was only making 2-4 mph backwards, away from home.
The Mini is not properly pitching which is necessary to go fast.
Instead of up to 30° tilt for Sport Mode, the tilt angle is no more than 10°.
This is another problem that was fixed with Firmware 1.0.5.
Battery now at 24% and distance = 463 ft.
Altitude is around 140 ft (wind is usually stronger up high).
The drone is not maintaining altitude properly .
At 12:38.8 you try RTH with the drone 780 feet from home but it just blows backwards at 7-8 mph.
You go to Sport Mode again at 13:05.6, but with full stick the Mini is going backwards at 4-8 mph and your confused joystick input takes a wandering course.
At 13:17 Distance = 1170 ft, Battery = 15%
Here you seem to lose direction and steer the drone the wrong way, taking it southeast away from home at a faster speed.
It's back to RTH at 13:37.8 and the Mini is going abckwards at up to 10 mph, getting further away.
From about 13:50, the drione makes a big uncommanded descent and descends from 100 ft to 36 feet with no joystick input.
At 15 minutes, battery is down to 5% and teh distance = >2000 ft with the Mini going backwards at 5-10 mph.
It starts to autoland at 15:03.5 and the signal is lost and data stops at 15:04.1 with the Mini 38 ft higher than the home point, battery at 4% and distance = 2084 feet away from home.
The drone would have landed in the sea soon after.
The whole flight was a mess with poor speed and altitude stability, (probably due to using early firmware ?).
Having more recent firmware probably would have prevented at least some of the problems.
But as well as poor performance from the Mini, there was also poor piloting with the drone left up high where the wind was strong and allowed to blow away.
It should have been brought down where the wind was less and brought home long before it got away.
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