Transport & space · c. 1965

High-bypass turbofan

Pushing most air around the core makes jet engines quieter and far more efficient.

General Electric's TF39, developed for the C-5 Galaxy in the mid-1960s, had a bypass ratio of about 8:1. High-bypass fans cut fuel burn per passenger sharply and lowered noise. Every modern widebody airliner engine uses this design.

See it in the living treeWikipedia