[udba]

The Ehang seems interesting, but ultimately it's limited by battery tech and the fundamental inefficiencies of the design which makes it more of a gimmick than anything else.

There's enough open source information laying around on the internet to figure out the power draw of the Ehang in flight and from there you can figure out roughly how much the batteries on it weigh (spoiler: it's many 10s of kilograms for the 23min flight time they claim [1]).

Don't forget that these batteries will degrade with time, especially in such a high-load performance regime. This will further limit your flight time until you replace them. On top of that, having 8 tiny props is always going to be less efficient than a fixed-wing or helicopter-like design.

If you're a Chinese billionaire, you don't care that your "flying car" has these limitations, but these same limitations (among many others) preclude the Ehang from becoming an actual practical method of transportation.

[1] http://www.ehang.com/news/137.html