|An Allison TF41-A-1B turbofan|
|Manufacturer||Allison Engine Company / Rolls-Royce Limited|
|Major applications||LTV A-7 Corsair II|
|Developed from||Rolls-Royce Spey|
The Allison TF41 (Company designations RB.168-62 and Model 912) is a low-bypass turbofan engine.
Design and development
The TF41 was jointly developed by Allison Engine Company and Rolls-Royce from the latter's RB.168-25R Spey. Allison manufactured the TF41 under license, while Rolls-Royce supplied parts common to existing Speys. The TF41 was developed for use in the LTV A-7D Corsair II for the USAF, and the US Navy's A-7E. Between 1968 and 1983, a total of 1,440 TF41s were delivered.
- LTV A-7 Corsair II (USAF -D and US Navy -E models),
- Type: Turbofan
- Length: 114.5 in (2908.3 mm)
- Diameter: 40 in (1016 mm)
- Dry weight: 3,511 lb (1592.6 kg)
- Compressor: Three-stage LP compressor, two-stage IP compressor (both driven by LP turbine),11-stage HP compressor
- Combustors: Cannular combustor with ten flame tubes
- Turbine: Two-stage LP, Two-stage HP
- Maximum thrust: 14,250 lb (64.5 kN)
- Overall pressure ratio: 20:1
- Bypass ratio: 0.77:1
- Air mass flow: 258 1b/sec
- Power-to-weight ratio:
- http://www.flightglobal.com/pdfarchive/view/1968/1968%20-%200018.html TURBOFANS: A Survey of Current Airline Powerplants
- Gunston, p. 9
- Connors, Jack (2010). The Engines of Pratt & Whitney: A Technical History. Reston. Virginia: American Institute of Aeronautics and Astronautics. ISBN 978-1-60086-711-8.
- Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. p. 9. ISBN 0-7509-4479-X.
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