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  1. Ever wondered how those WWI planes shot through the propeller without striking the propeller blades

    Ever wondered how those WWI planes shot through the propeller without striking the propeller blades

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  3. Breaking the Sound Barrier: The Game-Changing X2 Technology by Sikorsky

    Breaking the Sound Barrier: The Game-Changing X2 Technology by Sikorsky

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  8. Amazing Invention- This Drone Will Change Everything

    Amazing Invention- This Drone Will Change Everything

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