Aircraft engine takeoff and climb thrust control

Abstract

Engines of an aircraft are controlled during a mission including a takeoff phase, a climb phase, and a cruise phase, the climb phase including a top of climb (ToC) period prior to transitioning to the cruise phase. A controller may control the one or more engines to output a takeoff thrust during the takeoff phase, the takeoff thrust corresponding to the maximum thrust during the takeoff phase. The controller may further control the one or more engines to output a ToC thrust during the ToC period, the ToC thrust corresponding to the average thrust during the ToC period, wherein the one or more engines is controlled such that a thrust ratio is between 1.1 to 1.6, the thrust ratio being defined as a ratio of the ToC thrust as normalized by a ToC ambient static pressure to the takeoff thrust as normalized by a takeoff ambient static pressure.