What is the proper starting sequence for a turbojet engine?

The proper starting sequence for a turbojet engine is critical for ensuring that the engine starts safely and effectively. Starting with the starter is essential because it provides the initial rotational speed needed for the compressor to begin drawing in air. Once the compressor is turning sufficiently, ignition is introduced to initiate the combustion process in the engine.

After the ignition system is activated, fuel is introduced into the combustion chamber. This sequence is crucial since fuel should only be added once the engine is ready to support combustion, preventing any risk of fuel pooling, which could lead to flashback or other hazardous conditions.

Each component of the start sequence works in harmony to ensure that the engine can run reliably after it has started. The starter prepares the engine, ignition ensures that the air-fuel mixture ignites correctly, and fuel is introduced when conditions are safe for combustion. This sequence minimizes the risks associated with starting a turbojet engine and is foundational knowledge for those operating and maintaining these engines.