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09-07-2008, 04:26 PM
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#111 (permalink) |
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Member
Join Date: May 2008
Location: Spartanburg, SC
Posts: 79
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I am assuming Boardmember is going to post a subsequent clip showing a change in rise/run rate.
In waiting for that I would like to hear from all the X-players/pitchers/catchers that have seen a "real riseball"-----at what point in the balls travel to the plate would you say you saw the "jump" on the ball? My experience as a former Mens Open hitter and as a Dad that has caught a few riseballs----it happens about 2/3 of the way to the plate. In other words, after the ball has traveled about 25--30 feet. Would like to hear from others and then get an opinion of why it jumps when it does. Rick |
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09-07-2008, 06:38 PM
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#113 (permalink) | |
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Member
Join Date: Jul 2008
Posts: 61
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Quote:
It shows the the rise/run rate changing early, then flattening to a "fairly consistant" rise/run mid-flight, then dropping back down:  |
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09-07-2008, 06:45 PM
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#114 (permalink) |
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Member
Join Date: Jul 2008
Posts: 61
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Keeping in mind that a 63mph rise ball from approx. 39-40 ft. (including the push/drag release point), is reaching the hitting zone in less then 1/2 second. It's my opinion that the mind "NOTES THE JUMP" (change in rise/run) when it actually happens...........
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09-07-2008, 07:13 PM
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#115 (permalink) | |
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Member
Join Date: Jul 2008
Posts: 61
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Quote:
Pixel mapping is used as a precise measurement of positioning within the picture frame. By enlarging each frame, and marking the exact position of the center of the ball, one can use an advanced image editor to "note" the "pixel height" in each frame. Pixels in each picture are measured top to bottom, with the lowest number at the top of the frame. IE, the very top of the frame is the first pixel. So as the position increases in height, the pixel position number decreases...... I've marked the rise rate in pixels at each position. As you can see, the largest change happens early, in the first 3 frames............... Enjoy!  |
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09-11-2008, 04:48 AM
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#116 (permalink) |
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Member
Join Date: May 2008
Location: Spartanburg, SC
Posts: 79
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Board Member
Some excellent work! Trust me, as stated before I would like to believe a riseball rises, but I want to ensure all factors are taken into consideration relative to the pixel mapping. Help me understand a few things: 1) I see the difference in the first three frames-----don't understand then why when I view it live with a ball coming at me it appears to make its "jump" at about the 30 ft. distance. Is it brain/vision lag? 2) looking at the pixel mapping of your student (who does appear to get good spin/speed to hold her angle) the pixel numbers near the end of the ball flight indicate it dips and then rises again. 3) what affect does the pixel mapping have relative to the ball speed slowing down as it travels to the catcher? Does the camera capture a consistent run rate when the ball is losing speed as it travels farther? 4) what effect does the surface of the playing field have on the pixel mapping--i.e. the pitchers area typically has a hole/dip in the landing area. 5) are you able to translate pixels into a relative distance? How much would you calculate the ball is jumping? Can't believe your posting hasn't generated more feedback--I definitely appreciate your efforts. Rick |
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09-11-2008, 11:24 PM
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#117 (permalink) |
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Senior Member
Join Date: May 2008
Location: San Rafael, Ca
Posts: 106
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BM=
You have way too much time on your hands since stopping your posting at BBF. Please go back and start posting there. My belief supported by Watts and Bahill among others (KEEP YOUR EYE ON THE BALL), and even Nyman, is that all these riseball/fastball(underspin) trajectories are parabolic. see: http://gd.tuwien.ac.at/systeng/bahil...ngFastball.pdf http://gd.tuwien.ac.at/systeng/bahil...all/index.html http://gd.tuwien.ac.at/systeng/bahil...ball-pubs.html Bahill is at Arizona and a big fan of the ladies there. Last edited by tom.guerry; 09-11-2008 at 11:36 PM. |
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09-12-2008, 12:34 AM
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#119 (permalink) | ||
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Member
Join Date: Jul 2008
Posts: 61
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No thx Tom.......I'm done with that bunch........
Especially Big Mouth Bubba, the Texan boy who's about as athletic as a "brick"........ I've reviewed his posts at BBF in depth. The guy has NEVER said anything at BBF that wasn't some kind of ad-hominim attack, personal or otherwise, immature knee jerk response, or just plain rhetorical provocation......... He obviously had a tough childhood, and from his looks, was ridiculed most of his young life, and not much good at anything remotely athletic.......Sooooo, he lives his life vicariously through his computer, much like Richard IMO...... It's very possible many of those who post there at BBF have the same issues. If you've seen Bubba's golf swing, it's pretty obvious why he's big on the role of the hands. His body can't get out of it's own way.........I've seen better displays of coordination in a turtle race...... Regardless.........Moving on...... Quote:
This is why I believe the riseball is shown to work early vs. late in it's flight. The ball is definately dropping the last 3rd or so distance of flight.......Even though it still may be on an upward plane.......The rise/run rate decreases....to an eventual fall......... In baseball, the overhand throw plane trajectory is essentually downward. This in itself causes a higher gravitational effect EARLIER on the ball. And can't overcome this trajectory with backspin, lift and magnus...... Quote:
Last edited by BoardMember; 09-12-2008 at 12:37 AM. |
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09-12-2008, 06:11 PM
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#120 (permalink) |
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Junior Member
Join Date: Aug 2008
Posts: 7
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This is a composite of the trajectories of a rise, fastball and drop from this study. I added a batter as a reference. The rectangle in the middle represents, more or less, the decision/reaction area of the pitches flight path.
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