JET ENGINES
Turbojet Engine
Turbojets are based on the first design of the jet engine as described in the history. It is a reaction engine, meaning the expanding gases push hard against the front of the engine. Air is sucked in the engine and compressed. These gases spin through the turbine and shoot out the end, pushing the plane forward. Most turbojets are military fighters and fast business jets and the engine of choice for any high-speed aircraft, despite its higher fuel consumption. Fuel economy is compromised for supersonic velocities and maximum performance. An afterburner can be added to the turbojet which increases the temperature of the gas before it exits the nozzle. The increase in temperature is about 40 percent at takeoff and a much larger percentage at high speeds once the plane is in the air. The figure below is the turbojet and a turbojet with an afterburner.
