Planes That Never Flew

In The Last Rocket Fighter, the series examined at the Saunders-Roe SR.177, a combined jet- and rocket-powered interceptor aircraft, planned by the British company Saunders-Roe, but cancelled in 1957 due to a change in strategic plans.

In The American SST, the series examined American attempts to build a supersonic airliner which began in the 1960s in response to the Anglo-French Concorde project. The furthest advanced proposal, the Boeing 2707 project, was eventually cancelled in 1971 by Congress.

In America's First Jet Fighter, the series examines the Lockheed L-133, the first attempt by an American company to build a jet-powered fighter, begun in 1939 by Lockheed but later cancelled due to lack of interest.

In The Atomic Bomber, the series examines the WS-125, an attempt by the United States Air Force to develop a nuclear powered strategic bomber which could fly non-stop without refuelling. It was eventually cancelled in 1961 as unfeasible.