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The typical turbine engine is equipped with a capacitor-type, or capacitor discharge, ignition system consisting of two identical independent ignition units operating from a common low-voltage (DC) electrical power source: the aircraft battery, 115 AC, or its permanent magnet generator.
To make the start of an engine possible, two systems are installed for this purpose on a turbine engine. These are the start system and the ignition system. These two systems are always used together for an engine start on ground, but in the typical system description in an aircraft maintenance manual they are described in different chapters.
AMT Handbook - Powerplant (FAA-H-8083-32B) Chapter 5. Engine Starting Systems. Introduction. Most aircraft engines, reciprocating or turbine, require help during the starting process. Hence, this device is termed the starter.
The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the airplane.
There are three basic types of ignition systems that are used in small gas turbines, high tension (High Voltage), high-energy capacitor-discharge types and torch (Pilot) ignition types.
During aircraft starting, the FADEC primes the cylinders, adjusts the mixture, and positions the throttle based on engine temperature and ambient pressure. During cruise flight, the FADEC constantly monitors the engine and adjusts fuel flow, and ignition timing individually in each cylinder.
31 paź 1999 · Actual performance, design, types and the physical appearances of most turbine-powered aircraft ignition systems differ from application to application.
