mattv
lvl.2
Flight distance : 1027539 ft
Offline
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Cougar1 Posted at 2018-8-12 02:54
mattv, Don't want to argue but think you are missing my point. If you look at the first photo you posted you can clearly see that the two parts are still aligned and has not separated as a result of missing screws or the impact itself.
More likely are that there where not sufficient clamping force on the screw I marked in my first photo. The screw can feel tight but if the screw is bottomed out it will not have any clamping force allowing the whole unit to rotate instead of holding tight onto the splines. The propeller has not only hit the edge of the battery but also almost cheared off the support strut, and the parts are still aligned. As a final thought I do not think any Ultimadrone solution or Gaffers tape would have made any difference. Anyway, good luck with the repairs.
Cougar 1, thank you for your feedback. I understand what you are saying, I get it. Once again, thanks for taking the time to respond and post photos. You’re explanations are right on point. Is it possible for the screw to have been bottomed out? Absolutely. If one screw is the only thing keeping the arm from rotating/shifting in flight, then that is a huge liability isn’t it? It's possible that happened. I don’t think that’s the only thing that could have happened though.
All I'm saying is if both sides would have rotated equally together, then two props would have broke at the same time. One rear prop hitting the battery (which happened), and the other prop hitting the nose of the aircraft. That is not how it happened. I heard a slight rattle as the prop made contact against the drone (which as the battery), a few inches of the prop broke off, but the remaining three were functional. The drone did not fall immediately. It started to stay level in the air, next it went into a spin and crashed. As it hit the ground, the rest of the props were broken on impact and when the Inspire 2 flipped upside down.
Now, the rotation of the arm in the picture looks pretty bad, but it did not rotate that much in flight, there are no signs or markings to indicate that the front prop ever made contact with the drone, because it never did. Although the photo looks like the parts are aligned, they are not. The front and rear motor on the right side are actually off. The prop hit the strut too—you are right about that. That happened most likely when it hit the ground, rotating the arm more, because only a few inches of the prop broke off while it was in the air so the rotation wasn’t as it shows in the photo until after it crashed.
One other thing to note: when I move front side of the arm left and right, there is no movement, it’s attached pretty well. When I attempt the same thing with the rear part of the arm, there is movement, even with the screw on tight that you circled. The rear arm only had to move a little bit to break a few inches of the prop off while making contact with the battery to send it to the ground.
My reason for posting about this was to warn other Inspire 2 pilots, and also to make sure DJI knows of this problem. I reached out to DJI customer service about this and they escalated the issue and a manager was supposed to call me. I have not received a call as of yet. |
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