Low elevation, close proximity to obstacles and backdraft

[adrianrizali]

Hi, i'm from banjarmasin, indonesia.
Have u ever tried to fly tello in close proximity to the ground or floor and walls, like say 15 cm height and 10 cm to walls.
did u get your tello a little bit hard to stabilize and control?
Is it some kind of back draft?
Tell me your experience. Thanks

 

[Skywalker]

I do not remember where I read it, but the recommendation is keep two blade diameters below and on each side of the drone.
NASA has studies on that.