Selected by Boeing to power the 747, the JT9D helped open a new era in commercial aviation, the high-bypass engine to power wide-body aircraft.
Production of the JT9D ended in 1990 to be replaced by the PW4000. There are still well over 2,000 JT9Ds powering 600 commercial aircraft world-wide.

models

• JT9D-7FW: 50,000 lb (222 kN) thrust

specifications

• Turbofan
• Fan: 1-stage
• Compressor: 3-stage LP, 11-stage HP
• Turbine: 2 + 4
• bypass ratio: 4.8
• pressure ratio: 26.7
• mass flow: 1,510 lbs/sec
   

used by

• Airbus A300
• Airbus A310
• Boeing 747
• Boeing 767
• McDonnell Douglas DC-10