This odd three rotor chopper is seen here at the 1949 Farnborough Air Show. Developed by the Cierva company (soon to be acquired by Saunders-Roe), this, the largest of helicopters flying at the time, was intended to be used in the agricultural business.
Courtesy of the Ed Coates Collection
For more visit http://www.edcoatescollection.com/ac6/Cierva%20W.11%20Air%20Horse.html
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