Their design was a small cantilever monoplane powered by a single 160 hp (120 kW) Lycoming O-290-A air-cooled flat-four engine positioned in the fuselage that drove two 3-blade rotors at the tips of the wings via a two-speed reduction gearbox.

A series of contracts from the United States Air Force (USAF) allowed development to continue, and for the Model 1-G to be rebuilt into a form suitable for flight testing.

[4] Lichten left Transcendental in 1948, and, in September 1952, Guerrieri sold his interests in the company to William E. Cobey Jr., a Kellett Aircraft Corporation vibrations expert who continued the development of the Model 1-G. With some funding provided by a 1952 Army/Air Force contract for flight data reports and analyses, hover testing of the 1750 lb.

[5] A second, improved, Transcendental tiltrotor aircraft, the 2,249 pounds (1,020 kg), two seat place Model 2, was subsequently developed by William E. Cobey Jr. but funding limitations resulting from the withdrawal of Air Force support prevented the expansion of the flight envelope, and the program was terminated in 1957.

Although it never made a complete transition to and from wing-borne flight, tilt angles of 75 degrees were reached during testing, with more than 90% of lift generated by the aircraft's wings.