Solar-Powered Aircraft Developments Solar One
| Solar One | |
|---|---|
| Role | Electric aircraft | 
| National origin | United Kingdom | 
| Manufacturer | Solar-Powered Aircraft Developments | 
| Designer | David Williams | 
| First flight | 13 June 1979 | 
| Introduction | 1978 | 
| Retired | 1979 | 
| Number built | 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.