![]() ![]() ![]() The fan stage accelerates a large volume of air through a duct, bypassing the engine core (the actual gas turbine component of the engine), and expelling it at the rear as a jet, creating thrust. Rather than using all their exhaust gases to provide direct thrust like a turbojet, turbofan engines extract some of the power from the exhaust gases inside the engine and use it to power the fan stage. Modern turbofans are a development of the turbojet they are basically turbojets that include a new section called the fan stage. While these engines are capable of giving high thrust levels, they are most efficient at very high speeds (over Mach 1), due to the low-mass-flow, high speed nature of the jet exhaust. The turbojet compresses and heats air and then exhausts it as a high speed, high temperature jet to create thrust. It was a concept brought to life by two engineers, Frank Whittle in England UK and Hans von Ohain in Germany. The original air-breathing gas turbine jet engine was the turbojet. ![]() ( July 2018) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. ![]()
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