There are very few machines as complex to build as a turbojet engine. The turbine blades on a commercial airliner are grown from a single crystal of metal. The engineering tolerances are crazy ...

Jet engines are known to be highly demanding machines, requiring the utmost attention to tolerances, material specifications, and operating regimes. If any of these parameters are ignored ...

There are a lot of different aircraft, and they all use a variety of engines from different engine manufacturers. Two of the more commonly used engines are turbofan and turbojet engines.