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Re:Cora – Kitty Hawk's prototype air taxi [video] by ameister14 on Tuesday March 13, 2018 @09:41AM (#16575987)
It won't be 30 minutes. It'd be a few hours. First because they said it could go faster than 150kph, which means it tops out at roughly 90 miles an hour. Second, the range of the thing is about 60 miles, so you'd have to charge it partway.
Re:Cora – Kitty Hawk's prototype air taxi [video] by Retric on Tuesday March 13, 2018 @09:57AM (#16576091)
Swapping batteries is a no brainier for this tech. There is zero reason to have a 500k aircraft waiting around charging vs having 2+ set's of batteries.

Electric cars have a long enough range and are mostly single family so swapping is less useful.

Reserve is a much larger issue, aircraft want to keep ~1hour of reserve these things are starting with less than that.

Re:Cora – Kitty Hawk's prototype air taxi [video] by mtgx on Tuesday March 13, 2018 @10:01AM (#16576130)
I don't know how practical it is to build one like these yet, but really like the design of Lilium, and it has 2x the speed:

https://lilium.com/