The Armstrong Whitworth AW.171 was a British project of the 1950s to develop a supersonic VTOL flying wing aircraft.
It was planned to investigate the extremely low aspect ratio delta wings proposed by Professor A.A. Griffith for supersonic transports.
The A.W.171 design was a very slender delta flying wing powered by two Bristol Orpheus turbojets mounted at the wingtips, with 10 Rolls-Royce RB.108 lift jets.
The pilot was to lie in a prone position to minimise drag.
Data from Paper Planes:Armstrong Whitworth's unbuilt projects[1]General characteristics Performance