Idea for a helicopter, presented to the Académie des Sciences in 1784 by Launoy and Bienvenu;

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Photo credit: © World History Achive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1784, 19th-century, académie, aerial, aircraft, airoplane, airplane, aviation, bienvenu, des, design, engineering, feathers, french, helicopter, idea, launoy, model, pioneer, presented, sciences, transport