STP671

    Overview of the C-5A Service Loads Recording Program

    Published: Jan 1979


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    Abstract

    The United States Air Force (USAF) C-5A Service Loads Recording Program (SLRP) was initiated in the early 1970s to acquire in-service data in sufficient quantity to define the operational environment of an “average” C-5A and to develop repeated loads (stress) spectra for applications in loads and fatigue analyses. Instrumentation was installed on 26 airplanes to record up to 53 different data parameters on magnetic tape by means of the C-5A MADARS recorder. Over 9000 h of usable operational data were acquired in the course of the program. Using these measured data along with current analytical data for wing stresses, airplane vertical acceleration, and other responses, analyses were conducted for 13 different load sources. The results were new criteria and modified analytical wing loads which were used in the design phase of the C-5A Wing Modification Program and in the updating of service life predictions made by the C-5A Individual Aircraft Service Life Monitoring Program.

    Keywords:

    airplanes, data recording, service life, fatigue tests


    Author Information:

    Stone, WJ
    Aircraft development engineer specialist, structures engineer, structures engineer, and aircraft development engineer specialist, Lockheed-Georgia Co., Marietta, Ga.

    Stanley, AM
    Aircraft development engineer specialist, structures engineer, structures engineer, and aircraft development engineer specialist, Lockheed-Georgia Co., Marietta, Ga.

    Tyson, MJ
    Aircraft development engineer specialist, structures engineer, structures engineer, and aircraft development engineer specialist, Lockheed-Georgia Co., Marietta, Ga.

    Kimberly, WH
    Aircraft development engineer specialist, structures engineer, structures engineer, and aircraft development engineer specialist, Lockheed-Georgia Co., Marietta, Ga.


    Paper ID: STP35866S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP35866S


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