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'
The internal structure of the JT9D
The Pratt & Whitney JT9D high-bypass turbofan engine was developed for the Boeing 747
The Pratt & Whitney PW2000, also known by the military designation F117 and initially referred to as the JT10D, is a series of high-bypass turbofan aircraft engines with a thrust range from 37,000 to