In 1969, an U.S. company, Rohr Industries, Inc., licensed the Aérotrain technology to build the hovertrains in the United States. That same year the Aérotrain established the world record for a TACV, the pilots saying that with a longer track even higher speeds could have been reached without major difficulties. The final prototype, the "Aérotrain I80", set a world speed record in 1974 for overland air cushion vehicles, reaching a speed of and a peak speed of . The prototypes, which ultimately used twin turbine engines through a ducted propeller with seven blades, demonstrated they could accelerate and decelerate quickly, which offered a huge advantage of enabling effective service between tightly spaced stops.