Where are the longest blades typically located in a turbojet engine?

In a turbojet engine, the longest blades are typically found at the rear of the engine. This location is significant because these blades are part of the turbine section, which extracts energy from the high-temperature, high-velocity exhaust gases produced during combustion. The turbine blades need to be long enough to harness the energy effectively, ensuring proper rotation of the turbine and maintaining engine performance.

This arrangement also aligns with the function of the turbojet engine, where the airflow accelerates through various stages. As air moves through the engine, the pressure and temperature change, influencing the design and size of the components. The turbine blades must be designed to withstand extreme conditions and maximize energy extraction from the exhaust, making their length critical for achieving these performance goals.

The other locations mentioned, such as at the front of the engine or near the combustion chamber, do not correspond to the placement of the longest blades, as these areas typically house other components like the compressor and combustion chamber, which have different operational requirements.