Patent ID: 9404419
Filing Date: 2016-08-02
CPC Classification: B64D,F02C,F05D,Y02T

Claim Text:
1. A method for optimizing operability of an engine set of an aircraft including main engines as main drive sources, the method comprising: by a main power source including an engine other than the main engines as a drive source, producing a totality of non-propulsive energy including during a phase of operating the main engines when none of the main engines have failed; and during one or more transient phases of the main engines, producing a portion of propulsive energy less than a totality of the propulsive energy, by the main power source supplying a power to a high-pressure body of the main engines to increase a surge margin between a working line of at least one of the main engines and a surge line of the at least one of the main engines.