The Solar-Powered Aircraft Developments Solar One is a British mid-wing experimental solar-powered aircraft that was designed by David Williams and produced by Solar-Powered Aircraft Developments under the direction of Freddie To and first flown on 13 June 1979. It was the third solar-powered aircraft to fly after the unmanned AstroFlight Sunrise and the manned Mauro Solar Riser.
Made by Solar-Powered Aircraft Developments.