J48 | |
---|---|
A Pratt & Whitney J48 | |
Type | Turbojet |
National origin | United Kingdom/United States |
Manufacturer | Pratt & Whitney |
Major applications | Grumman F9F Panther Grumman F-9 Cougar Lockheed F-94 Starfire |
Number built | 4,108 |
Developed from | Rolls-Royce RB.44 Tay |
The Pratt & Whitney J48 (company designation JT7 Turbo-Wasp) is a turbojet engine developed by Pratt & Whitney as a license-built version of the Rolls-Royce Tay. The Tay/J48 was an enlarged development of the Rolls-Royce Nene (Pratt & Whitney J42).
In 1947, at the behest of the United States Navy, Pratt & Whitney entered into an agreement to produce the Rolls-Royce Nene centrifugal-flow turbojet engine under license as the J42 (company designation JT6), for use in the Grumman F9F Panther fighter aircraft. [1] Concerned that the Nene would not have the potential to cope with future weight growth in improved versions of the Panther, Luke Hobbs, vice president of engineering for P&W's parent company, the United Aircraft Corporation, requested that Rolls-Royce design a more powerful engine based on the Nene, which Pratt & Whitney would also produce.
By 1948, Rolls-Royce had designed the Tay turbojet, also a centrifugal-flow design. However, as Rolls-Royce was then developing an improved design with an axial compressor, which would become the Avon, the development and production of the Tay turbojet was left to Pratt & Whitney. [1] [2] However, Rolls-Royce retained the rights to the Tay outside of the United States.
The Tay/J48 was a thirty percent enlargement of the preceding Nene/J42, and was produced both with and without afterburning. [2]
Several aircraft types used the J48 engine during the 1950s, including the Grumman F9F-5 Panther. [3] and Grumman F9F-6/F9F-8 Cougar, [4] The U.S. Air Force's Lockheed F-94C Starfire [5] and North American YF-93 used afterburning versions of the J48 engine. [6]
Data from The Engines of Pratt & Whitney: A Technical History. [7]
Data from Aircraft engines of the World 1957 [8]
Related development
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