The narrow wings fold down along the sides of the car. Prof Klein drove it straight off the runway and into town upon arrival, watched by invited reporters. He described the experience, early on Monday morning, as "normal" and "very pleasant". In the air, the vehicle reached a cruising speed of 170km/h. It can carry two people, with a combined weight limit of 200kg (31 stone). But unlike drone-taxi prototypes, it cannot take off and land vertically and requires a runway.