Pratt & Whitney JT9D
Turbofan aircraft engine first flown in 1968
Pratt & Whitney JT9D
The Pratt & Whitney JT9D engine was the first high bypass ratio jet engine to power a wide-body airliner. Its initial application was the Boeing 747-100, the first "jumbo jet". It was Pratt & Whitney's first high-bypass-ratio turbofan.
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