IN-FLIGHT RESTART SYSTEM AND METHOD FOR FREE TURBINE ENGINE

摘要

There is described a method and system for in-flight start of an engine (56). The method comprises rotating a propeller (30); generating electrical power at an electric generator (34) embedded inside a propeller hub (32) from rotation of the propeller (30); transmitting the electrical power from the electric generator (34) to an engine starter (54) mounted on a core of the engine (56) via an electric power link; and driving the engine (56) with the engine starter to a sufficient speed while providing fuel to a combustor to light the engine to achieve self-sustaining operation of the engine (56).