The Rolls-Royce vertical take-off-thrust measuring rig, 1954.

Rolls-Royce V.T.O. Test Bed, XJ 314, (Flying Bedstead), 1954

The Rolls-Royce Thrust Measuring Rig (TMR) was a vertical take-off and landing aircraft developed by Rolls-Royce in Hucknall, England in 1954. It was designed to research jet propulsion. The TMR took its inaugural tethered flight in 1953, followed by its first free flight the following year. The rig is sustained in flight purely from the vertical thrust of two turbo-jet engines, and as a result does not have wings. This unconventional appearance gave it the nickname "Flying Bedstead." The TMR was also the first jet-lift aircraft to fly anywhere in the world.