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Flying over water

4x4

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Hi has anybody had much experience with flying there tello over water ?
 

4x4

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Is it safe to take a short flight from the shore or a boat in no wind over the water ?
 

volate!lo

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Is it safe to take a short flight from the shore or a boat in no wind over the water ?
no.
I tried it and it was a near disaster. At least using the stock app, as it wanted to autoland all the time because the VPS shuts off over water. It was a constant fight to get the drone back onboard so no photos or video were made. I was happy to have Tello back onboard.

There is two things you can try. First is to put some tape over the downfacing pinhole camera. VPS will be off but short indoor test flights did not trigger the autoland. Or maybe they have updated the firmware to no longer autoland on VPS lost? Need to try a bit more.

Second, if you are a TelloFpv user: I just added an option that cancels any landing if you use the throttle. Maybe I will change that to cancel any autolanding that I can get hold off. That feature is not yet release, will go into the next release.


What seems to work is flying over shallow, totally flat (0.0kn wind) and crystal clear water as Tello seems to use the seabed then. But I bet distance & position calculation will be wrong so RTH won't work well
 

Ansia

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Is it safe to take a short flight from the shore or a boat in no wind over the water ?
You should be allright as long as you don't stop to hover. It will not hold position and some have reported that it starts to autoland. I suggest you practice at the beach/lake before taking it out on a boat.
 

4x4

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Thanks for the replies it gives me some options to try.
 

Guorium

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no.
I tried it and it was a near disaster. At least using the stock app, as it wanted to autoland all the time because the VPS shuts off over water. It was a constant fight to get the drone back onboard so no photos or video were made. I was happy to have Tello back onboard.

There is two things you can try. First is to put some tape over the downfacing pinhole camera. VPS will be off but short indoor test flights did not trigger the autoland. Or maybe they have updated the firmware to no longer autoland on VPS lost? Need to try a bit more.

Second, if you are a TelloFpv user: I just added an option that cancels any landing if you use the throttle. Maybe I will change that to cancel any autolanding that I can get hold off. That feature is not yet release, will go into the next release.


What seems to work is flying over shallow, totally flat (0.0kn wind) and crystal clear water as Tello seems to use the seabed then. But I bet distance & position calculation will be wrong so RTH won't work well
Tello does not have RTH.
 

Guorium

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volate!lo mentioned the telloFPV app (which he created) and it has RTH feature
the stock tello app does not.
Interesting. It must be based on telemetries. I wound't depend on it for tello has no gps.
 

Louis08

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Interesting. It must be based on telemetries. I wound't depend on it for tello has no gps.
Somewhere he confirmed something like this.
But IMHO under normal conditions even the most basic RTH is better than none - it will get the drone at least closer to you, even if it misses the takeoff point by a few meters.
 
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AnGo

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I can confirm from my own experience that Tello doesn't like flying over lakes. It suddenly goes down unexpectedly, you need to get rid of VPS by already flying >10m before going over water for example and always be prepared to manually control altitude in case of sudden sinking. I now know what I need to be prepared for, but first time really was a moment of slight panic when Tello seemed to try to go swimming without (at least to me in this early phase with only little experience) any apparent reason.
 

4x4

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Thanks yes I have had similar experiences and almost lost it . I do find if the water is clear a calm it is ok. However I don't take the risk anymore.
 

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