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Author Topic: Pin to midline distance  (Read 7503 times)

boondoggle

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Pin to midline distance
« on: April 12, 2005, 05:47:44 PM »
What effect does pin to midline distance have on ball reactions when drilling a bowling ball?

Edited on 4/19/2005 11:38 AM
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T-GOD

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Re: Pin to midline distance
« Reply #16 on: April 18, 2005, 03:52:00 PM »
Jabs,

Bowling balls have 2 RG's, not 1. They have a max and a min. The max is when the core is standing up and the min is when the core is laying down. One is the X axis and the other is the Y axis.

When the pin is 0 inches from the PAP, the RG is the minimum value.

As you move the pin towards your track the RG increases to the maximum value when it's 6 3/4" from your PAP.

When you lay out a ball, the distance the pin is from your PAP determines what the RG is, based on the balls high and low RG numbers.

So, as you can see, the RG changes due to the layout/pin distance to PAP, irrelevant to drilling of the holes..!!

Jabroni slapped in the face, AGAIN..!! =:^D

For further reference, check out this thread... http://www.ballreviews.com/Forum/Replies.asp?TopicID=26983&ForumID=18&CategoryID=5



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njv29

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Re: Pin to midline distance
« Reply #17 on: April 18, 2005, 04:13:35 PM »
T-god, you're still missing the point. The original question was what effect the pin's height above the midline had. This means the Pin to pap distance is the same in both instances. Your comment about pin to pap distance chaning RG in itself is obvious, and was already established about 17 posts ago.

Next time, try reading the orignal post and thinking about what it is asking making yourself look retarded.
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DP3

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Re: Pin to midline distance
« Reply #18 on: April 18, 2005, 08:11:16 PM »
This is indeed an interesting thread, but I don't think anyone should be calling names or saying T-God is an idiot if they don't have anything to contribute to the thread.  It looks as if every aspect of the argument, whether it be right or wrong has been covered.  

quote:
If you put the pin on your midline, you are placing three holes near the top of the core, thus pushing weight towards the center. When you put the pin above the fingers, you're placing three holes in the center of the core, thus pushing the weight towards the outside of it.

This being said the closer to the midline the pin is...the lower the RG of the ball overall. The higher the pin, the higher the RG.


This pretty much sums it up, although you still have to take the nature of the ball into consideration.  Even if you take lets say a Rotogrip Rush which has a very low RG and place the pin over the fingers, you've raised the R.G to it's max but it's still a low RG ball and will act like one.  Then if you take on the other side of the spectrum something like a Powergroove and put the pin in the palm, you've lowered the RG to it's max but it's still a High R.G. ball and will still act like one.
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T-GOD

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Re: Pin to midline distance
« Reply #19 on: April 19, 2005, 11:12:24 AM »
Jabs, I don't make up anything and call them facts. I state the facts. You obviously don't know what the facts are and never did..!!
quote:
Also, you can place the pin, above or below the midline, so as not to hit the core, so we'll leave those comments about hitting the core out of the equation.
Obvioiusly, the rest of you who chimed in about it being a "drilled ball", didn't read this.

Back to the original question, the pin to midline distance is the same as if you have finger or thumb weight in the ball. The higher up the pin, the more length and/or flip. The lower the pin, the earlier and more even the roll. =:^D
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Steven

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Re: Pin to midline distance
« Reply #20 on: April 19, 2005, 11:46:06 AM »
quote:
The higher up the pin, the more length and/or flip. The lower the pin, the earlier and more even the roll. =:^D  


T-GOD: Thanks for cutting through Jabroni's crap and providing a straight answer. Gezzzz....................
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Ishmael

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Re: Pin to midline distance
« Reply #21 on: April 19, 2005, 01:17:59 PM »
There's so much bs in this post, it's going to be difficult, but let's try to sort it out.

TGod said
quote:
If the pin is the same distance from the PAP, no matter where it is on the ball, the RG will remain the same.  


This is not true.  Depending on where the pin is, the gripping holes are removing mass from a different part of the ball and potentially changing the final RG of the ball.

Jabroni said  
quote:
This being said, what difference does pin to PAP distance have on the core? All it does is place the core in a position to rotate.

A ball with an RG of 2.50 is going to have that exact RG whether it's a pin axis drill or a 5 1/2 inch pin......until the holes show up.


Yes and no.  The RG of the ball is not changing based on the pin position, but the RG of the layout is.  If this were correct, a ball drilled with the pin 6 3/4" from the PAP would roll exactly like a ball drilled pin on PAP since both layouts have zero flare.  It doesn't because the 6 3/4" layout lopes due to the higher RG while the pin on PAP revs early due to the lower RG.

DP3 said  
quote:
Even if you take lets say a Rotogrip Rush which has a very low RG and place the pin over the fingers, you've raised the R.G to it's max but it's still a low RG ball and will act like one. Then if you take on the other side of the spectrum something like a Powergroove and put the pin in the palm, you've lowered the RG to it's max but it's still a High R.G. ball and will still act like one.


While the concept of the ball retaining is natural characteristics is correct, a few things need clearing up.  Pin at 6 3/4" from PAP is max RG, not "pin above fingers", which as we know means nothing unless you know the bowlers PAP.  Min RG is pin on PAP, not "pin in the palm".

I'm really not sure why this thread is still going since Charlest answered the original question in the first post.
 
quote:
The higher you move the pin the higher you make the drilled RG of the ball and the longer the ball will go down the lane before it starts to hook. Keep in mind that this added length is ONLY in comparison to the same ball drilled with a lower pin.
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DanH78

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Re: Pin to midline distance
« Reply #22 on: April 19, 2005, 01:20:40 PM »
quote:

I'm really not sure why this thread is still going since Charlest answered the original question in the first post.


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onlybowling

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Re: Pin to midline distance
« Reply #23 on: April 19, 2005, 02:35:02 PM »
Thanks to all of you who contributed to this thread.  It takes quite a bit for me to get the picture so that i can understand the answer.

  It seems that several posters are angry with T-God over posts that were written in the past....I don't have enough understanding to choose a side - I don't want to choose a side.

I am reading to learn.  I do love this game.
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