The Druine D.31 Turbulent is a French single-seat ultralight Homebuilt aircraft designed by Roger Druine.

The D.31 Turbulent was designed to be amateur-built and is a single-seat ultra-light aircraft with cantilever low-wing and fixed tailwheel landing gear. Designed to be powered by a 30 hp (1200cc) Volkswagen or similar engine.  The fuselage uses wood construction. Rollason Aircraft Engines Limited produced 29 factory-built D.31 aircraft in the United Kingdom and three D.31A models with strengthened wing spar in order to get a full British certificate of Airworthiness. Five Turbulents are operated by the Tiger Club in 2019.