In terms of:
rotor diameter : weight lifting ratio
how much hp required to lift let's say 250 kg
own weight
efficiency
Or were these questions already answered in another thread?
This car can fly, or maybe this copter can drive? It's really both and either. The heart of the Pop.Up is a passenger capsule that can be attached to either the ground module (a skateboard-style electric car platform) or the air module (a drone-like flying contraption). It was imagined by Airbus...