Pratt & Whitney JT9D
| JT9D | |
|---|---|
| The internal structure of the JT9D | |
| Type | Turbofan |
| National origin | United States |
| Manufacturer | Pratt & Whitney |
| First run | December 1966 |
| Major applications | |
| Number built | >3,200 |
| Developed into | |
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 original "Jumbo Jet". It was Pratt & Whitney's first high-bypass-ratio turbofan.