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More on ducted propellers, the Q-tip propeller von RCModelReviews   4 years ago

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When I did a video explaining how ducts improve the performance of propellers, a number of people asked why they don't simply put tip-fins on the end of regular propellers to improve efficiency.

Well the Q-tip propeller is the closest thing you'll find to a prop with a tip-fin and in this video, I explain how it works and provide some pictures of one fitted to a full-sized autogyro.



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