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Category:Prototypes

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A 1948 photo of The Cierva W.11 Air Horse helicopter prototype(tested and found that the rotors should be re-positioned for maximum efficiency) - Photo by The Imperial War Museum.
A 1948 photo of The Cierva W.11 Air Horse helicopter prototype(tested and found that the rotors should be re-positioned for maximum efficiency) - Photo by The Imperial War Museum.

Early samples or models built to test the feasibility and use of a product

Pages in category "Prototypes"

The following 3 pages are in this category, out of 3 total.

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