In 1921 René Tampier tackled the problem of designing an aircraft that was self-propelled and steerable on roads by including a second, low-powered engine driving the main landing wheels through a standard car-type transmission. The roadwheels were completed with a retractable pair nearer the tail. These were steerable, so on the road the Tampier Avion-Automobile, with its wings and tailplane folded, travelled tail first. Only two prototypes were built.
