NASA Spiral Duct ESTOL Concept
Extremely Short Takeoff and Landing advanced vehicle concept based upon the coupling of the Lippisch Aerodyne and Custer Channel Wing. Designed to takeoff of at a speed of just 30 mph, with ground distances of less than 150 ft. The outer panels are freewings (able to freely pivot) so that the vehicle is less gust sensitive (which is a major ESTOL problem). Developed as part of the NASA Personal AIr Vehicle project under Mark Moore.