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The Unexpected Genius of Contra-Rotating Propellers

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Testing 8 Innovative New Boat Propeller Designs

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The Unexpected Genius of Bionic Propellers

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Designing A Self Propelling Ionic Thrust Wing

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World's Most Advanced Flying Cars

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Genius Propeller Is About to REVOLUTIONIZE Ships, Here's Why

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The insane machine that conquered Antarctica for the USSR - the Kharkovchanka