Roll Royce Medway

Roll Royce Medway  is a proposed large low-bypass turbofan engine produced by Roll Royce and tested in early 1960s.  The project was cancelled due to favor of the Roll Royce Spey engine and the cancellation of Armstrong Whitworth AW.681 VTOL transporter project.
The development of this engine were based on the Roll Royce Pegasus engine which were used for Harrier prototype, it was designed byby a team led by Alan Arnold Griffith, the RB.141 was originally designed to meet a new propulsion requirement for the de HavillandDH.121 airliner project which later became the Hawker Siddeley Trident. The engine was later named after the River Medway in line with Rolls-Royce company tradition for jet engines.
The first application for the medway is the Armstrong Whitworth AW 681 VTOL transporter prototype.
The rear section of the engine was modified to incorporate an internal thrust deflector to duct exhaust gases through swivelling nozzles; an idea similar to that used on the contemporaryBristol Siddeley Pegasus. Cancellation of the AW.681 project however also brought to an end further development work on the Medway with attention turning to the smaller, but very closely related, Spey turbofan.
Another application is for the SAAB Vigen, the Sweden military attack aircraft but due to government funding, the idea was not adopted.
In December 1963 the Medway had successfully completed over 1,700 hours of bench running.

Specifications (RB.141-3 Medway)

General characteristics

• Type: Low bypass twin-spool turbofan
• Length:
• Diameter:
• Dry weight:

Components

• Compressor: Axial, 5-stage LP, 11-stage HP
• Combustors: Cannular, 10 chambers
• Turbine: 2-stage LP, 2-stage HP

Performance

• Maximum thrust: 11,800 lb
• Overall pressure ratio: 16.75:1
• Power-to-weight ratio:unknown

References:http://en.wikipedia.org/wiki/Rolls-Royce_Medway