Allison TF41
The Allison TF41 (Company designations RB.168-62 and Model 912) is a low-bypass turbofan engine.
| TF41 Spey | |
|---|---|
 | |
| An Allison TF41-A-1B turbofan | |
| Type | Turbofan |
| Manufacturer | Allison Engine Company / Rolls-Royce Limited |
| First run | 1967 |
| Major applications | LTV A-7 Corsair II |
| Number built | 1,440 |
| Developed from | Rolls-Royce Spey |
Design and development
The TF41 was jointly developed by Allison Engine Company and Rolls-Royce from the latter's RB.168-25R Spey.[1] Allison manufactured the TF41 under license, while Rolls-Royce supplied parts common to existing Speys.[2] 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.[3]
Applications
A TF41 of a U.S. Navy A-7E-4-CV Corsair II (BuNo 156809).
- LTV A-7 Corsair II (USAF -D/-K and US Navy -E models),
Specifications (TF41-A-1)
General characteristics
- Type: Turbofan
- Length: 114.5 in (2908.3 mm)
- Diameter: 40 in (1016 mm)
- Dry weight: 3,511 lb (1592.6 kg)
Components
- 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
Performance
- Maximum thrust: 14,250 lb (64.5 kN)
- Overall pressure ratio: 20:1
- Bypass ratio: 0.77:1
- Air mass flow: 258 1b/sec
- Thrust-to-weight ratio: 4.06
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See also
Related development
Comparable engines
Related lists
References
- http://www.flightglobal.com/pdfarchive/view/1975/1975%20-%200025.html
- http://www.flightglobal.com/pdfarchive/view/1968/1968%20-%200018.html TURBOFANS: A Survey of Current Airline Powerplants
- Gunston, p. 9
- http://www.flightglobal.com/pdfarchive/view/1968/1968%20-%200018.html
- "Archived copy". Archived from the original on 2018-02-21. Retrieved 2018-01-31.CS1 maint: archived copy as title (link)
- 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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