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p33k4y t1_irqpdit wrote on October 10, 2022 at 9:16 AM

Reply to comment by Thecna2 in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot

>This change from Low Bypass Turbofan to High Bypass occurred in the 80s.

1970s:

Pratt & Whitney JT9D on the Boeing 747-100 (in service 1970)
GE TF39 on the Lockheed C-5 Galaxy (1970)
GE CF6 on the McDonnell Douglas DC-10 (1971)

The CFM56 also started production in 1974 but did not enter commercial service until 1982.