1. I'm interested in the economics of this vs helicopters. Why would someone buy one? Is it cheaper? Faster? More energy efficient per mile? 2. Hydrogen fuel

1. I'm interested in the economics of this vs helicopters. Why would someone buy one? Is it cheaper? Faster? More energy efficient per mile? 2. Hydrogen fuel cells drive an electric motor, no combustion needed. Battery weight seems to be a huge factor for VTOL. Hydrogen drones can easily fly for hours for example. Also what about safety? Helicopters can be landed even in case of power failure.