Joby Aviation develops electric vertical take-off and landing (eVTOL) aircraft. Its S4 eVTOL can carry one pilot and four passengers, travel up to 150 miles on a single charge, and reach a maximum speed of 200 miles per hour. Unlike many of its competitors, which use separate propellers for takeoff and cruising, the S4 uses a single propeller for both modes -- reducing its weight and enabling it to travel faster and farther. Joby is still awaiting the FAA's approval to launch its first commercial flights, b ...