BallReviews
General Category => Drilling & Layouts => Topic started by: sir dyno on October 27, 2005, 02:04:33 AM
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what are asymtrical and symetrical balls.... what is meant when said that ____ ball is asyimtetrical.... and there is a lot of talk about such and such layout is symetrical ect.
Edited on 10/27/2005 11:21 AM
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I know you're a newbie but you'll have to be more specific as to what you mean?
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JEFF
"...each anothers audience outside the gilded cage.."
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quote:
I know you're a newbie but you'll have to be more specific as to what you mean?
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JEFF
"...each anothers audience outside the gilded cage.."
sorry... check the edit
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"I shall spend my life preparing... and one day my chance will come...." - Abraham Lincon
to who much is given, much is expected - somwere in the bible...
brand new member of the F.O.S. with a brand new hybrid dirty bomb that won't shoot anything less than a 225
dynothane and lane 1.... is there any better of a combination?
who needs to messure with a bomb
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Symmetric-cored balls have the same cross section no matter which direction you cut it (along the pin). Set the ball with the pin at the top, cut it in half downward. Both halves are the same.
Asymmetric balls aren't like that. They have more mass on one side of the ball than the other. Cutting the ball on different planes (but still through the pin) will give different views of the core.
Some balls are "dynamically symmetrical", like the Infernos, Buzzsaws, or Fuzes. Different cutting planes give slightly different shapes but they react like symmetric cored balls. Usually four- or eight-sided balls fall into this category.
In reality, it's not so much the symmetry of the core or the mass bias, it's the preferred spin axis. Balls with an asymmetric core and a mass bias have a built-in preferential spin axis. Spin them freely and they will tend to move so that they are spinning about their PSA. The speed at which they move from their initial spin axis to their PSA is an indicator of how strong the mass bias is.
Symmetric-cored balls (or dynamically symmetric as above) don't have a PSA. Asymmetric, mass-bias balls do.
SH
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Do a quick search for Storm Track's unoffical FAQ post. The need for this surfaces about once a week and this post is priceless for handling questions such as this.
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Pain is weakness leaving the body.
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link added for convenience
http://www.ballreviews.com/Forum/Replies.asp?TopicID=74110&ForumID=16&CategoryID=5
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Pain is weakness leaving the body.
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http://morichbowling.com/
has some good drawings of asymmetrical cores. -- JohnP