Measured reductions in acceleration times which resulted from the application of the F-15 performance seeking control (PSC) maximum thrust mode during the dual-engine test phase is presented as a function of power setting and flight condition. Data were collected at altitudes of 30,000 and 45,000 feet at military and maximum afterburning power settings. The time savings for the supersonic acceleration is less than at subsonic Mach numbers because of the increased modeling and control complexity. In addition, the propulsion system was designed to be optimized at the mid supersonic Mach number range. Recall that even though the engine is at maximum afterburner, PSC does not trim the afterburner for the maximum thrust mode. Subsonically at military power, time to accelerate from Mach 0.6 to 0.95 was cut by between 6 and 8 percent with a single engine application of PSC, and over 14 percent when both engines were optimized. At maximum afterburner, the level of thrust increases were similar in magnitude to the military power results, but because of higher thrust levels at maximum afterburner and higher aircraft drag at supersonic Mach numbers the percentage thrust increase and time to accelerate was less than for the supersonic accelerations. Savings in time to accelerate supersonically at maximum afterburner ranged from 4 to 7 percent. In general, the maximum thrust mode has performed well, demonstrating significant thrust increases at military and maximum afterburner power. Increases of up to 15 percent at typical combat-type flight conditions were identified. Thrust increases of this magnitude could be useful in a combat situation.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Maximum thrust mode evaluation


    Contributors:


    Publication date :

    1995-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Maximum Thrust Mode Evaluation

    J. S. Orme / S. G. Nobbs | NTIS | 1995


    Maximum Thrust Nozzles

    WILLIAM E . CONWAY AND AARS CELMINS | AIAA | 1972


    Aerodynamics. Maximum thrust

    Prouty, R.W. | Tema Archive | 1999


    Three-Dimensional Thrust Nozzle Design for Maximum Axial Thrust

    LYNN E. SNYDER AND H. DOYLE THOMPSON | AIAA | 1971