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Tuesday, July 21, 2009
Similar batted balls… but different
Harry gives us a taste:
Here we have two hard-hit grounders. One was hit very hard. They went to almost the identical spot, but ended up with very different results.
...
According to Thomas, Greene reached (or was reached by) ball one 1 in 1.6 seconds. Ball two passed the infield in 1.5 seconds.
As Joe Arthur notes in the comments as he watched the actual footage:
After looking at the video of the Soriano and Johnson ground balls, I wonder if we are seeing the effects of batted ball spin ... in spite of the similar horizontal angles as measured by HIT f/x, Soriano’s ball ended up about 6 feet closer to 2nd (you can tell by the mowing pattern on the infield). Also Johnson’s ball seemed to bounce higher (and made contact with the ground fewer times?) than Soriano’s, so that it may have lost velocity less quickly, so that it could get through the infield faster in spite of a much slower initial velocity [assuming the HIT f/x measurement is correct].
In terms of what we want (to be able to recreate the actual footage, but in video-game format, meaning that we need as many parameters as possible), it sure looks like there’s alot of little things that need to be captured.
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