Argentinian designer Marchese Raul Pateras de Pescara builds several helicopters 1919 to 1924, tested in France : this 1922 model has four rotors to provide vertical lift Date: 1922
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Image Number: 4220-21860013Rights ManagedCredit Line:Mary Evans Picture Library/Pantheon/SuperStockCollection:Mary Evans Picture Library Model Release:NoProperty Release:NoResolution:4281×2969
