George Cayley's 1796 helicopter model
Right: George Cayley's 1796 helicopter model: the contra-rotating rotors are feathers stuck in corks, operated by a bow-string. It is a variation of the models made in 1784 by Launoy and Bienvenu (left)
Picture No
10841874
Media ID
48053352
Size
4000px x 2355px
(862KB)
Credit
© The Royal Aeronautical Society (National Aerospace Library) / Mary Evans Picture Library
Source
Photograph from The Royal Aeronautical Society Archive
