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Fuel flows through an external line from the fuel control to the starting-fuel solenoid. During the starting sequence, the pilot actuates the start-fuel solenoid switch in the cockpit. The solenoid actuates the valve to the open position, then fuel flows through an external line to the start-fuel manifold. The start-fuel nozzles are attached to the manifold; the number of nozzles varies according to engine design. The nozzles introduce atomized fuel in the combustion chamber during the starting sequence. After the engine has attained a specified speed, the main fuel starts to flow automatically. After the engine is running on the main fuel system, the start fuel system is shut off. A starting fuel system is shown in Figure 2.3.

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Figure 2.3. Starting Fuel System.



David L. Heiserman, Editor

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Revised: June 06, 2015