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

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.[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]


A TF41 of a U.S. Navy A-7E-4-CV Corsair II (BuNo 156809).

Specifications (TF41-A-1)

Data from Flight.[4][5]

General characteristics



See also

Related development

Comparable engines

Related lists


  1. ^ "alfa romeo | fiat | 1975 | 0025 | Flight Archive". Archived from the original on 2012-10-26.
  2. ^ TURBOFANS: A Survey of Current Airline Powerplants
  3. ^ Gunston, p. 9
  4. ^ "Archived copy". Archived from the original on 2012-10-26. Retrieved 2010-06-23.((cite web)): CS1 maint: archived copy as title (link)
  5. ^ "Military Turbofan Engine Data". Archived from the original on 2018-02-21. Retrieved 2018-01-31.