METHOD OF AND DEVICE FOR STARTING AIRCRAFT HIGH-BY-PASS RATIO TURBOJET ENGINE Russian patent published in 2004 - IPC

FIELD: aircraft industry. SUBSTANCE: invention relates to aircraft engines, namely, to double-flow turbojet engines with high-by-pass ratio at tail wind. According to proposed method, prior to starting the engine, fan speed is measured and result obtained is compared with reference value, passage part of engine is closed by reverser assembly and when fan speed is less than preset reference value, engine starting system is switched on. Engine starting system contains logic unit which compares value of reverse speed with reference value and generates control signals according to logic algorithm and fan measuring unit and fan sense of rotation detection unit, these units being connected with air-craft computer. When engine starting reaches final phase, after delivery of starting fuel, reverser assembly is set into cruise position. Proposed method of starting of aircraft double- flow turbojet engine with high-by-pass ratio at tail wind and device for implementing the method make it possible to remove limitations as two rear wind and exclude delays of flights and ahead-of-schedule removals of engine from aircraft caused by gas- dynamic instability at engine starting. EFFECT: prevention of abnormal operation of engine at starting. 3 dwg, 2 dwg