Vertical Aerospace’s electric urban air taxi has completed its maiden untethered flight, marking a significant milestone for the Bristol-based startup. The flight took place on Wednesday at Cotswold Airport in southwest England, where a full-scale prototype of the VX4, the company’s eVTOL, flew at about 70km/h or 40 knots. According to the company, the aircraft was remotely piloted and reached the targeted speed powered only by its battery propulsion system.