Hubsan Zino 2 - From Great Flight to Garbage Flight (Crash follows from 30:00)

** UPDATE 6 Sept 2020 ** For 3 months now, I'm still trying to get Hubsan to accept responsibility for a product defect in my Zino 2 causing this crash, especially after I did a detailed, frame-by-frame review of both the screen capture video and actual flight video. Surprisingly, I discovered that the forward right motor came off in flight, tethered to the arm only by the wiring which it then broke free from during the fall or, perhaps more likely, on impact...but if on impact, it took quite a bounce to end up in the garden. Whether a propeller issue (one propeller broke from its hub) that led to extreme vibrations causing the motor screws to loosen but remain trapped in the ESC housing, or if simply the screws coming loose for unknown reasons (poor assembly?), I don't know. All I know is a failure beyond my control and unquestionably a product quality/integrity issue occurred. Hubsan keeps talking about the flight log that I tell them wasn't created because the Zino 2 failure precluded that happening, and I'm emphasizing they need to look at the temporary data files I provided them. Their engineers should be smart enough to at least do as much as I did, plotting some of that data to show motor activity becoming very erratic in the last 2 minutes of flight. Seeing the data, in combination with the video frames should be conclusive evidence of a product failure and that this merits an in-warranty repair or, ideally, a replacement. The video frames showing the detached motor can be found at http://tinyurl.com/Z2crash-MotorFail and the plot of motor, elevation, and battery data is a large image at https://tinyurl.com/Z2crash-recordTempAnalysis
*** END UPDATE ***

For 2 consecutive flights of my Hubsan Zino 2 on May 18, 2020, I first enjoyed a good flight with no issues other than an accidental USB disconnection, but then a 2nd flight that started with a "No FPV" issue during setup that I resolved, proceeded on into a good flight that after the 30:00 mark, starts exhibiting various erroneous behaviors that culminate in a rather severe crash. Unfortunately, there is no flight log for the crash flight, which I presume is due to what I am guessing to be an FPV failure during flight that is characterized by a degraded video capture. At the time, the gimbal was pitched downwards, and the video returns to normal when the gimbal was returned to a level, straight-ahead position....very strange.

To reduce the overall video length, the bulk of the first flight is accelerated 500%. With that flight being free of issues and sunlight breaking through the clouds, I decided to do the 2nd flight to assess lens flare issues. With the other problems observed, lens flare was the least of my concerns, and the overall behavior of the Zino 2 leading into the crash was beyond my control; the most notable events follow from the 30:00 mark in the video. The sky was clear in the area of flight and there was nothing in the vicinity that should have introduced any type interference, based upon my history of flights in the same area being trouble free.

My Hubsan Zino 2 arrived from Gearbest on 5 February 2020, with no working FPV signal or video from the moment I removed it from the box. Hubsan sent a replacment camera cable that took 6 weeks to arrive, so my first more substantial flight with a working camera did not occur until 7 April 2020, following a few short flights to gain some familiarity with the Zino 2. So, for all practical purposes, this Hubsan drone lasted barely more than 5 weeks before it suffered a major failure resulting in a crash. I consider myself lucky that I was able to get it back near the vicinity of my home before it failed, managing to avoid the risk of injury to person or property other than my own.

I will be notifying Hubsan about this failure and crash of my Zino 2. I hope that even in the absence of a flight log for the crash flight, they accept the responsibility for the problems seen being due to manufacturing or quality control problems with the Zino 2, and provide me with a new Zino 2 to replace mine. To do anything less is unacceptable.

Other images/data for this flight can be found at: https://tinyurl.com/dp-zino2crash, including a video of the last 100 seconds of the flight, a composite image of the external damage, and I found in the absence of a flight log that there is a hubsan2/recordTemp folder that appears to contain what might be the data captured for the most recent flight log. That data may then be compiled into a flight log saved upon a successfully completed flight, to a separate hubsan2/recordFile folder, Hopefully that data will be useful to Hubsan in the absence of being able to send them a flight log.

Видео Hubsan Zino 2 - From Great Flight to Garbage Flight (Crash follows from 30:00) канала Daryl P