BallReviews
General Category => Drilling & Layouts => Topic started by: khamûl on May 02, 2008, 03:56:05 AM
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cliff notes in the subject line...
for those that would like to keep up with USBCs motion analysis study, here is the final report posted at bowl.com. i recommend some caffeine before reading (sorry Paul), unless discussion of regression analysis excites you
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http://www.bowl.com/Downloads/pdf/Specs/08ballmotionstudy.pdf
for those wishing to delve deeper into this, ibpsia is doing an emerging concepts seminar June 16th-20th in Orlando, for a small tuition fee of $1300 for non-members. you may see me there, look in the bar near the back of the room
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discuss?
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good luck and good bowling.
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It's okay, I understand the report was wrote as a summary and is not the most exciting thing I have ever written. With that being said we are presenting about the ball motion study at bowl expo and USBC convention in kansas city. If anyone would like more information on the findings we will be presenting there. Emerging Concepts is a little different, I will be there too writing down notes in the back.
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"Oops, Looks like we are going to need another timmy." -Dr Lizard, "Dinosaurs"
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thank you for clearing that up, Paul. while i cannot make KC, i hope to bump into you in Orlando.
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good luck and good bowling.
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CGNOMENTIONED!

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Ken
Videos at http://www.putfile.com/k-dawg77
http://www.myspace.com/lefthandedhammerpride
http://khlthe2nd.bowlspace.com
http://members.bowl.com/FindAMember/memberView.aspx?mp=418&ms=2006&s=2006-2007
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Cg was mentioned, but it was seperated into Side, Top, and Thumb weight. On the graph on page 13 you see the importance of each variable in a ball's motion.
The coverstock variables are the first 5, the core variables were the next 4, and then it was mixed between ambient temperature and humidity, differential, and ta-da, side, thumb, and top weight. They all had an effect, but were minimal compared to surface friction in and out of oil, and oil absorption.
On page 16 the report says they will be implementing new specifications for surface hardness and will relax the limits on static weights.
About time.
*backswing
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*...Got the 5 out clean!
To prove I'm real
270-2931 http://members.bowl.com/FindAMember/memberView.aspx?mp=270&ms=2931&s=2005-2006
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they need to focus on giving 2 900 series
to a kid who prebowled them
after they did that i hope they get new mangement to restore our faith in creditability of bowlers
sorry for my rant i apolgize
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member of the fos
long live lane 1 and thier great products
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Side weight is more important than Intermediate Diff. Hmmm.... =:^D
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T-God...good catch...!
REgards,
Luckylefty
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Open the door...see what's possible...and just walk right on through...that's how easy success feels..
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quote:
Side weight is more important than Intermediate Diff. Hmmm
and the size of your balls matters more than side weight....
drunken spin time matters even more, of course
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good luck and good bowling.
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Being that I'm currently studying psychology, I have one major issue with the study. It says (on page 14) that results were tested on different lane surfaces using a different type of oil. But only a few parameters were tested, this does not mean that statistically everything else will remain the same across different the different surfaces. Some surfaces and finishes will clearly be stickyer (not sure if this is the right word but i hope you understand what i mean) in combination. According to everything i've been taught a scientific study can assume nothing and must prove (using raw data) everything that is to be concluded.
The thing i disagree with is that the numbers don't decrease in a linear fashion across the board. They decrease in differing amounts, tho it is true that the numbers all decrease. Also the intended angle of trajectory at 49 and 60 feet is different, although still half is not numerically the same difference. I'd be interested to see what the differences across the other statistical measures would equate to.
Just some thoughts probably from a more statistical background and perspective than any of you cared to know. But hey, i guess we're all entitled to our 2 cents.
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When all else fails, become a lefty
Edited on 5/14/2008 8:27 PM
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I would like to see how these numbers would change on a 35' pattern? 50' of oil? I would assume that all static weights would come into play more on the shorter than 50' pattern.
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like everything good in life its all about friction
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Kiall Hill
Visionary test staff