‘rotors’ historical pictures (exact matches)

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Rotor Power Plant
Rotor Power Plant
Flettner rotor ship, 1924–1925
Flettner rotor ship, 1924–1925
Knives, Scissars, and Rotors to Grind
Knives, Scissars, and Rotors to Grind
Page from Army and Navy Stores Catalogue, 1939–40
Page from Army and Navy Stores Catalogue, 1939–40
Russian inventor Igor Sikorsky with a prototype helicopter, 1910
Russian inventor Igor Sikorsky with a prototype helicopter, 1910
Autogyro, aircraft with both rotors and a propeller, invented by Spanish engineer Juan de la Cierva in 1923
Autogyro, aircraft with both rotors and a propeller, invented by Spanish engineer Juan de la Cierva in 1923
Autogyros over Horse Guards Parade, London, 1930
Autogyros over Horse Guards Parade, London, 1930
Page from Gamage's General Catalogue (96th edition), c 1927
Page from Gamage's General Catalogue (96th edition), c 1927