Solar-Powered Aircraft Developments Solar One

The Solar-Powered Aircraft Developments Solar One is a British mid-wing, experimental, crewed solar-powered aircraft that was designed by David Williams and produced by Solar-Powered Aircraft Developments under the direction of Freddie To. On 13 June 1979 it became one of the first solar-powered aircraft to fly, after the uncrewed AstroFlight Sunrise and the crewed Mauro Solar Riser, and the first successful British solar-powered aircraft.

Source: Wikipedia — Solar-Powered Aircraft Developments Solar One (CC BY-SA 4.0)