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Word of warning...

KarlosDaishi

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Tried for an adventurous shot today. Visited the local fish quay. Flew tello out over the side.
Almost immediately i got 'visual posituoning not available' and it started to drift back, away from me.
(Luckily it wasnt out into the river)

1525715787529.jpg1525715819313.jpg
 
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zhaoshirong

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So the uniform surface of the water confused the bottom facing optical sensors so it didn't know where it was?
 

tel__2

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It probably depends on the visible field of view of the downwards camera. And as I remember the documentation states that bodies of water are not a great idea to fly over ;)
Good thing nothing happend to your tello.
 

Drone It

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Might have a little problem over the water, but those pictures for such a little drone are great, i just hope Ryse figures out a way to improve the video!
 

TimTwerp

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I also have flown the Tello over water! Once the drone lost positioning, drifted quickly down wind and ... out of range. When I reacquired the signal, I could not see the drone...so I increased altitude and looked around until I could tell with first person view how to return. It is easy to lose sight of the drone, especially when using a range extender.
The second time I flew over water, I was less than 20 feet and Tello went into auto land mode! The Tello got with in a couple of feet of landing on the water before I coached her back up into the air...i have video of that!

I will attest that flying over water is hazardous to the future of your tello. I still do it, but try to stay very close to an edge or other objects, (boats) in the water.
 

zhaoshirong

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I was under the impression that if it lost its VPS it switched to using the altitude sensor.
 

KarlosDaishi

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Nice and calm today so tried a second shot. Had a friend with me as a spotter to keep an eye on things, as it's easy to lose your bearings when watching the screen and the position of the drone.
Had a little backwards drift (with the direction of the wind) but vertical height was steady. Could have possibly gone further 'out' into the river but don't want to push my luck1527614723095.jpg
 

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