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Ric-Jet 4. Some kind of homebuilt ducted fan aircraft powered by the engine of a Mazda RX-2. (Ca. 1975) : r/WeirdWings
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Jason McDowell - Which of these obscure ducted-fan aircraft types is your favorite? While all are cool looking, none have yet provided a net benefit that surpasses the drawbacks inherent in the
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Numerical analysis of aerodynamic characteristics for the design of a small ducted fan aircraft - Zhengjie Wang, Li Chen, Shijun Guo, 2013
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