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engine - At what point is a turbine powered ducted propeller considered a turbofan? - Aviation Stack Exchange
Contraction of air stream from propellers; (a) free fan (b) ducted fan | Download Scientific Diagram
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Streamlines at the inlet and exit of a ducted fan for a) hover and b)... | Download Scientific Diagram
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Contraction of the air stream coming from propellers (a) free fan and... | Download Scientific Diagram
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