Patent ID: 8459038

Claim:
A method of controlling a two-spool turboshaft engine, comprising controlling a controllable load operatively coupled to a low-pressure compressor of the two-spool turboshaft engine so as to provide for maintaining a predefined relationship between a rotational speed of said low-pressure compressor of said two-spool turboshaft engine and a rotational speed of a high-pressure compressor of said two-spool turboshaft engine such that the rotational speeds of the low pressure-compressor and the high-pressure compressor are mutually dependent, wherein the operation of controlling said controllable load is responsive to at least one of a rotational speed signal of said low-pressure compressor or a rotational speed signal of said high-pressure compressor, said low-pressure compressor of said two-spool turboshaft engine is operatively coupled by a corresponding low-pressure spool to a low-pressure turbine of said two-spool turboshaft engine, and said high-pressure compressor of said two-spool turboshaft engine is operatively coupled by a corresponding high-pressure spool to a high-pressure turbine of said two-spool turboshaft engine.