"A turbofan thus can be thought of as a turbojet being used to drive a ducted fan, with both of these contributing to the thrust.": https://en.m.wikipedia.org/

"A turbofan thus can be thought of as a turbojet being used to drive a ducted fan, with both of these contributing to the thrust.": https://en.m.wikipedia.org/wiki/Turbofan https://en.m.wikipedia.org/wiki/Turbofan