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  2. Piasecki X-49 SpeedHawk - Wikipedia

    en.wikipedia.org/wiki/Piasecki_X-49_SpeedHawk

    The Piasecki X-49 "SpeedHawk" is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft.The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

  3. Ducted propeller - Wikipedia

    en.wikipedia.org/wiki/Ducted_propeller

    A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter. It was developed first by Luigi Stipa (1931) and later by Ludwig Kort (1934). The Kort nozzle is ...

  4. Thrust vectoring - Wikipedia

    en.wikipedia.org/wiki/Thrust_vectoring

    A multi-axis thrust vectoring engine nozzle in motion. Thrust vectoring, also known as thrust vector control (TVC), is the ability of an aircraft, rocket or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) to control the attitude or angular velocity of the vehicle.

  5. Ducted fan - Wikipedia

    en.wikipedia.org/wiki/Ducted_fan

    In aeronautics, a ducted fan is a thrust-generating mechanical fan or propeller mounted within a cylindrical duct or shroud. Other terms include ducted propeller or shrouded propeller . [ 1 ] When used in vertical takeoff and landing ( VTOL ) applications it is also known as a shrouded rotor .

  6. List of X-planes - Wikipedia

    en.wikipedia.org/wiki/List_of_X-planes

    Compound helicopter Vectored Thrust Ducted Propeller (VTDP) testbed. [62] X-50 Dragonfly: Boeing DARPA 2003 Canard Rotor/Wing [63] X-51 Waverider: Boeing USAF 2010 [64] Hypersonic scramjet [65] — X-52 — — — — Number skipped to avoid confusion with Boeing B-52 Stratofortress. [31] X-53: Boeing NASA, USAF 2002 Active Aeroelastic Wing ...

  7. List of VTOL aircraft - Wikipedia

    en.wikipedia.org/wiki/List_of_VTOL_aircraft

    Hawker P.1127 (vectored thrust) Hawker Siddeley Harrier (vectored thrust) Hawker Siddeley Kestrel (vectored thrust) Hawker-Siddeley HS.133; Hawker-Siddeley HS.138 (ducted fans) [2] Hawker-Siddeley HS.145; Hawker Siddeley P.1017 (cancelled supersonic vectored thrust) Hawker Siddeley P.1154 (cancelled supersonic vectored thrust) Hawker Siddeley P ...