The Blackburn "Bluebird" "two-seat training and sport airplane
A 1927 NASA Aircraft Circular, catalogued from the NASA Technical Reports Server, that presents a two-seat training and sport airplane, the Blackburn Bluebird, for aviation engineers and students. The page pairs scaled three-view technical drawings (front, side and plan) with photographs of the aircraft in flight, showing a biplane with a wide wingspan, a fixed landing gear and float-equipped versions, which suggests strong linework and clean geometric diagrams for a designer.
