ASTM WK63444

    New Terminology for Aircraft Braking Performance

    (What is a Work Item?)

    Developed by Subcommittee: E17.26 | Committee E17 | Contact Staff Manager


    1. Scope

    1.1 The terms and definitions listed provide common set of definitions and concepts that have been agreed upon by the Society of Aircraft Performance and Operations Engineers. While historical reports and studies may use different terms, all concepts should be relatable to the definitions listed. 1.2 Units--The values stated in SI units are to be regarded as the standard. There are no SI units used in these definitions. New values relating to braking coefficients are described. 1.3 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    SAPOE; braking coefficient; slip ratio; friction; aircraft; MU; anti-skid:


    Friction-related discussion involving aircraft intersect with multiple disciplines at the same time. Specialties in areas of operations, regulatory compliance, aircraft-specific performance engineering, and airport operations are just a few of the interconnecting elements that form the context of professional understanding. To date, these relationships have suffered from an inherent propensity to generate misunderstandings and errors in communication. This terminology created by this group has directly addressed this imbedded hazard and has created a standard set of terms and phrases that consolidate historical industry concepts and practices with precise verbiage and phraseology. This terminology contains groups of terms that, when used together to form certain descriptive conditions, account for very specific intentions and meanings. While many of these meanings have been used in the past, they have not been officially published as a standard accepted by multiple stakeholders. This terminology accomplished this goal.

    The title and scope are in draft form and are under development within this ASTM Committee.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    John Gadzinski


    COS (18-12)

    Ballot Item Approved as E3188-2019 and Pending Publication