Pratt & Whitney seized an opportunity in 1947 and bought the American sales and manufacturing rights to the Rolls-Royce Nene engine.
In November 1948, it delivered the first J42 Turbo Wasp for the Navy's Grumman F9F-2 Panther, a single-engine fighter. The J42 was a centrifugal-flow turbojet with a thrust rating of 5,000 pounds. The J42 engine was active during the Korean Conflict in the early 50s, along with the company's product line of piston engines.
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