Don't get me wrong, this is super cool technology. But imagine putting a 1500kg Tesla 100kWh battery into a much more efficient Cessna type design that is lighter and has larger wings. It would need to dish up about 80kw to maintain cruising speed, which is only about 180km/h. Factoring in the tiny wings and incredible weight, this thing would be hard pressed to stay airborne for a hour at 100km/h. I just hope is capable of gliding to a landing if the Battery dies or fails. Then it could be safer than a helicopter.