Volume 35, Issue 6 (November 2007)

    An Apparatus to Evaluate the Pace of Baseball Field Playing Surfaces

    (Received 16 August 2006; accepted 4 May 2007)

    Published Online: 2007

    CODEN: JTEOAD

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    Abstract

    During a baseball game, the ball will strike the playing surface at a variety of speeds and angles. The speed at which the ball travels after impact with the playing surface has been referred to as the pace of the surface. Wide variations in pace can reduce the safety and playability of baseball field surfaces. Pace can be quantified by measuring the coefficient of restitution. The coefficient of restitution is defined as the ratio of two velocities; the velocity of a baseball after impact with the surface divided by the velocity of the ball prior to impact. An apparatus was developed to measure the coefficient of restitution of a baseball striking various playing surfaces. The apparatus, termed Pennbounce, uses infrared screens to measure the coefficient of restitution of baseballs propelled at varying angles and velocities. Pennbounce was used to measure the pace of traditional synthetic turf (Astroturf), infilled synthetic turf (Fieldturf), natural turfgrass, and skinned infield surfaces. Baseballs were propelled at the surfaces using two velocities and impact angles. Surface pace was highest on traditional synthetic turf, skinned infield, infilled synthetic turf, and natural turfgrass areas, respectively.


    Author Information:

    Brosnan, James T.
    Assistant Specialist, Dept. of Tropical Plant and Soil Sciences, the University of Hawaii, Honolulu, HI

    McNitt, Andrew S.
    Associate Professor, Dept. of Crop and Soil Sciences, The Pennsylvania State University, University Park, PA

    Schlossberg, Maxim J.
    Assistant Professor, Dept. of Crop and Soil Sciences, The Pennsylvania State University, University Park, PA


    Stock #: JTE100762

    ISSN: 0090-3973

    DOI: 10.1520/JTE100762

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    Author
    Title An Apparatus to Evaluate the Pace of Baseball Field Playing Surfaces
    Symposium , 0000-00-00
    Committee F08