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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

• LTV A-7 Corsair II (USAF -D/-K and US Navy -E models),

Specifications (TF41-A-1)

Data from Flight.[4][5]

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 lb/s (117 kg/s)
• Thrust-to-weight ratio: 4.06

See also

Related development

• Rolls-Royce Spey

Comparable engines

• Pratt & Whitney TF30

Related lists

• List of aircraft engines

References

• 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.

External links

• Rolls-Royce.com Spey page
• globalsecurity.org TF41 page

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На других языках

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- [en] Allison TF41

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[fr] Allison TF41

L'Allison TF41 (désignation des compagnies RB.168-62 et Model 912) est un turbofan américano-britannique à faible taux de dilution.

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