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2.21. GENERAL

Gas turbine ignition systems fall into three general types: first, the induction type, that produces high tension voltage by conventional induction coils; second, the capacitor type that causes ignition by means of high energy and very high temperature sparks produced by a condenser discharge; and a third type of ignition system, not widely adopted, that uses a glow plug.

Most ignition systems used on Army aircraft are of the high-energy capacitor type. This system has been accepted for gas turbine engines because it produces high voltage and an exceptionally hot spark, and the high voltage covers a large area.

The tachometer is one of the cockpit instruments described briefly in this section. Others are indicating systems for torque, engine oil pressure, engine oil temperature, exhaust gas temperature, and fuel pressure.

 

 

David L. Heiserman, Editor

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Revised: June 06, 2015