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The turbojet and turbofan are two common types of jet engines, and both are used in commercial and private aircrafts. The turbojet engine creates most of it’s thrust by the bypass of air through the jet engine, and the exhaust exiting the jet engine system. The turbofan jet engine creates most of it’s thrust by the fan blades located in the front of the jet engine.

The turbojet and turbofan jet engine both produce thrust by increasing pressure inside of the jet engine.