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High-Speed Test Results: ASA Equipment Testing & Certification Committee Recommendations

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This report presents findings from the High-Speed Test by the ASA Equipment Testing & Certification Committee, conducted on April 5-6, 2003, in Oklahoma. Key aspects include measuring inbound and rebound ball speeds at a pitch speed of 110 mph, determining bat swing speed, and analyzing ball performance under various conditions. The tests utilized 44/375 and 47/525 balls and aimed to assess the maximum batted ball speed (BBS) with comprehensive data evaluation. It highlights the need for realistic BBS metrics and the impact of bat properties on performance.

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High-Speed Test Results: ASA Equipment Testing & Certification Committee Recommendations

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  1. High Speed Test Results ASA Equipment Testing & Certification Committee Oklahoma, OK April 5-6, 2003 Lloyd Smith, Ph.D., P.E.

  2. High Speed Test • 110 mph inbound ball speed • Measure inbound and rebound ball speed • BBS from 85 mph swing speed and 25 mph pitch speed • Center of rotation 2.6 inches from knob • Scale swing speed with bat MOI • Scan bat every inch to find maximum BBS

  3. New Swing Speed Formula d=impact location from knob

  4. Preliminary High Speed Data • All tests used a pitch speed of 110 mph • WSU • measured ball-in and ball-out • used 44/375 ball, conditioned at 50% RH • NYU • measured ball-in and bat-out • used 47/525 ball • normalized BBS with ball COR

  5. BBS from Era Study (WSU)

  6. Era Study (NYU)

  7. BBS vs. BPF

  8. High speed test vs. ASTM 1890

  9. Ball Compression

  10. Ball Conditioning

  11. Summary • Current BBS of 85 mph (125 ft/s) not realistic • Field observations of high performance bats captured in high speed test

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