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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.
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 ...
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 .
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 ...
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 ...
Increased maneuverability, by adding a steerable nozzle to create vectored thrust; Noise reduction, resulting in a low sonar signature; this particular system has little in common with other pump-jet propulsors and is also known as "shrouded propeller configuration"; [3] [better source needed] applications:
Frank Nicolas Piasecki (/ p iː ə ˈ s ɛ k i / pee-ə-SEK-ee; Polish: [pjaˈsɛtski]; October 24, 1919 – February 11, 2008) was an American engineer and helicopter aviation pioneer.
Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift and can also withstand afterburning temperatures in conventional ...
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