The turbofan wikipedia page has a very nice graph that shows the propulsive efficiency of turbofans, turboprops and turbojets at different speeds. https://en.w

The turbofan wikipedia page has a very nice graph that shows the propulsive efficiency of turbofans, turboprops and turbojets at different speeds. https://en.wikipedia.org/wiki/Turbofan#Efficiency https://en.wikipedia.org/wiki/Turbofan#Efficiency