The air-start capability of a secondary engine control (SEC) was tested for a DEEC-equipped F100 engine and installed in an F-15 airplane. Two air-start schedules were tested. The first was referred to as the group I schedule; the second or revised schedule was the group II start schedule. Using the group I start schedule, an airspeed of 300 knots was required to ensure successful 40- and 25-percent SEC-mode air starts. If N2 were less than 40 percent, a stall would occur when the start bleeds closed 40 sec after initiation of the air start. All JFS-assisted air starts were successful with the group start schedule. For the group II schedule, the time between pressurization and start-bleed closure ranged between 50 and 72 sec depending on altitude. All air starts were successful above 225 knots givin a 75-knot reduction in required airspeed for a successful air start. Spooldown air starts of 40 percent were successful at 200 knots at altitudes up to 10,650 m and at 175 knots at altitudes up to 6100 m. Idle rpm was lower than the desired 65 percent for air starts at higher altitudes and lower airspeeds. All JSF-assisted air starts were successful.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Flight Evaluation of the DEEC Secondary Control Air-Start Capability


    Contributors:
    J. B. Johnson (author) / J. Nelson (author)

    Publication date :

    1983


    Size :

    21 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






    Flight testing the Digital Electronic Engine Control (DEEC) A unique management experience

    Putnam, T. W. / Burcham, F. W., Jr. / Kock, B. M. | NTRS | 1983


    Improved traffic light timing method based on DEEC clustering

    XIAO HAILIN / ZHAI JIEPING / WANG PENGJUN et al. | European Patent Office | 2021

    Free access

    Full Capability Formation Flight Control

    Osteroos, Ryan / Pachter, Meir / Jacques, David | AIAA | 2004