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Questions tagged [fenestron]

A Fenestron (or fantail, sometimes called "fan-in-fin") is a protected tail rotor of a helicopter operating like a ducted fan. Placing the fan within a duct reduces tip vortex losses, shields the tail rotor from damage, is much quieter than a conventional tail rotor, and shields ground crews from the hazard of a spinning rotor.

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How does a Fenestron remove or reduce the tip vortex losses in a helicopter? [duplicate]

How are Fenestrons (or fantails) able to reduce the tip vortex losses in a helicopter?
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