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13863822
Wall Art and Photo Gifts from Mary Evans Picture Library
13863822
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32307812
© Aviation Ancestry
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VISUAL DESCRIPTION
This image features a vintage advertisement for Rotol, showcasing their contra-rotating airscrews (propellers). The text "BRITISH TO THE CORE" is prominently displayed at the top, emphasizing the national origin and pride in the product. Below are two sets of propeller blades arranged in a staggered formation to illustrate the contra-rotating design where one set of blades rotates in the opposite direction to another set on the same axis. This technology was particularly useful in aviation for reducing torque and increasing efficiency. The bold lettering "ROTOL" at the bottom serves as both brand identification and a statement of quality associated with British engineering during that era.
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