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In the start sequence why do you turn on engine 3 first in c-130 aircraft?

You're right, it's not standard practice to turn on engine 3 first in a C-130. The typical start sequence for a C-130 involves turning on the engines in the following order:

1. Engine 1 (Left Engine): This is the first engine to be started. The reason for this is that the left engine is connected to the main hydraulic system, which is crucial for various aircraft functions like steering and brakes. Starting this engine first ensures the hydraulic system is pressurized and ready for operation.

2. Engine 2 (Right Engine): Once the left engine is running and the hydraulic system is pressurized, the right engine is started. This ensures that both engines are synchronized and providing power for the aircraft.

3. Engine 4 (Tail Engine): The tail engine is the last to be started. This is due to its distance from the cockpit and the need to ensure the other engines are running smoothly before powering up the rear engine.

Why not Engine 3?

There is no engine number 3 in a C-130. The aircraft has four engines:

* Engine 1: Left Wing

* Engine 2: Right Wing

* Engine 3: There is no Engine 3.

* Engine 4: Tail

Important Note:

The specific start sequence for a C-130 may vary depending on the model and specific operational procedures. It's crucial for pilots and maintenance crews to always follow the correct procedures as outlined in the aircraft's operating manuals and checklists.