- Jan 10, 2019
- Reaction score
Hi has anybody had much experience with flying there tello over water ?
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.Is it safe to take a short flight from the shore or a boat in no wind over the water ?
Tello does not have RTH.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
Somewhere he confirmed something like this.Interesting. It must be based on telemetries. I wound't depend on it for tello has no gps.
Imagine you are sitting in a train that is standing in a railway station directly beneath another train and all you have is the view on the other train. when the other train starts to move, without any other references, how you know if it is you who moves or the other one? that is the effect on the VPS as well when it tries to track a surface that moves - because of willows or non-static reflections. VPS tries to orientate itself on structures in the view area and how they change position. When seeing on the water and having no other reference like GPS, Tello cannot know if it is carried away from the wind or if the ground is moving. By default I assume it will try to compensate a hypothetic wind drift and start going anywhere across the water surface until it gets something fixed into viewHi there, living in The Netherlands, we have a lot of water, everywhere. Its like humans are living between the water and not vice versa. Anyway, is there a special reason why this happens? Why does the VPS shuts off over water? Is it a physical thing?