>>1813901Ground effect is a function of wing/rotor size and distance from the ground. I believe it's a 1:1 thing. So, for example, a 10ft wing can utilize ground effect up to around 10ft from the ground. Obviously it isn't an on/off thing, but it drops exponentially beyond that point.
Long story short, the Jetson's rotors are too small to ever use ground effect. Which makes it incredible inefficient, that thing probably drains 80 percent of its battery just from VTOL takeoff and landing. Curious as to how much ETL is (or isn't) a thing with these small rotors.