| The engines fitted on this particular aircraft were two pistons and two small turbojets. |
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| Today, the turbojets in many British and American aircraft owe their origins to Whittle and the many Lancashire workers who brought it into production. |
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| On the other hand, turbojets accelerate a much smaller mass flow of intake air and burned fuel, but they then reject it at very high speed. |
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| The most common reaction propulsion engines flown are turbojets, turbofans and rockets. |
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| Below about Mach 2, turbojets are very fuel inefficient and create tremendous amounts of noise. |
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| The last airliner that used turbojets was the Concorde, whose Mach 2 airspeed permitted the engine to be highly efficient. |
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| Other successes followed, including the T58, and T64 turboshaft engines, J85 and F404 turbojets. |
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| Turbofans are usually more efficient than turbojets at subsonic speeds, but their large frontal area also generates more drag. |
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| Turbofans differ from turbojets in that they have an additional fan at the front of the engine, which accelerates air in a duct bypassing the core gas turbine engine. |
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| Turbojets are particularly suitable for aircraft travelling at very high speeds. |
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