Pratt & Whitney PW4000
The Pratt & Whitney PW4000 is a family of high-bypass turbofan aircraft engines with certified thrust ranging from 52,000 to 99,040 lbf (230 to 441 kN). Built as the successor to the JT9D series engines, it has found much wider application than its predecessor.
Read more about Pratt & Whitney PW4000: Design and Development, Applications
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—Edwin John Pratt (1882–1964)