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High Speed Test Results

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

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High Speed Test Results

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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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