This paper proposes a new fuel-saving climb procedure by reducing thrust near top of climb. Aircraft usually climb at maximum thrust during the climb phase. However, as revealed in this paper, the maximum thrust during climb is not always optimal considering the fact that the engine fuel efficiency of the maximum thrust is worse than that of the cruise thrust. Potential fuel savings of 40–80 lbs by a large jet airliner can be the result of this different engine thrust, but such savings cannot be fully achieved because of aircraft capability and air traffic control constraints. Therefore, the author proposes a practical fuel-saving climb procedure to satisfy the constraints of current aircraft and air traffic control operation. It is shown that a simple rule ( 800    ft / min climb from 6000 ft below the optimal cruise altitude) can save more than half of the potential saving (20–50 lbs) regardless of the initial weight with the same aircraft type. It is also confirmed that the proposed procedure works for other aircraft types.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fuel-Saving Climb Procedure by Reduced Thrust near Top of Climb


    Contributors:
    Mori, R. (author)

    Published in:

    Journal of Aircraft ; 57 , 5 ; 800-806


    Publication date :

    2020-03-11


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    Airplane Climb Thrust Optimization

    DIRUSSO JOSEPH M / PARSONS KEITH D | European Patent Office | 2019

    Free access

    Airplane climb thrust optimization

    DIRUSSO JOSEPH M / PARSONS KEITH D | European Patent Office | 2020

    Free access

    Airplane climb thrust optimization

    DIRUSSO JOSEPH M / PARSONS KEITH D | European Patent Office | 2022

    Free access