Author Topic: Where is the bow-tie? (Read 1692 times)

Ragnar · « **on:** June 07, 2005, 04:55:52 AM »

You may recall that I've mentioned a layout I once had on an R2: pin down by thumb, CG stacked about even with mid-palm. Was a great ball for a couple of conditions. So, I had a Roto Assault just sitting about, getting lonely, and I thought I'd redrill it this way and see what happened. For those who don't know the Assault, it's a pretty aggressive ball. With the pin about 1 inch over and 1 inch down from the thumb, CG and mass bias stacked above that it goes almost dead straight (just like the old R2 did) for 50 feet or so then makes a small change of direction to the hole. Now, before reading on, where do you think the bow tie on this ball might be? (The answer is below.) It hits very well, and I think I'll keep it around for when I might want to play deep without a big hook. BUT, unlike the R2, it thumps every hole - which I don't mind as it isn't thumping hard enough to go airborne.

The answer is:

Dead smack in the middle of the thumb hole.
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"If one tells the truth, one is sure sooner or later to be found out. " (Oscar Wilde)
"Today I bent the truth to be kind, and I have no regrets, for I am far surer of what is kind than I am of what is true." (Robert Brault)

JohnP · « **Reply #1 on:** June 07, 2005, 05:22:00 PM »

Bob -- To get an approximation of the location of the bowtie, draw a line from the PAP through the pin to the track area. The cg is not involved, other than secondarily as the result of the pin placement. Balance holes can affect the bowtie location also. -- JohnP

Ragnar · « **Reply #2 on:** June 08, 2005, 11:02:42 AM »

JohnP, a line, such as the one you describe, would put the bow-tie about 2inches left of and below the thumb with this layout. That's where we thought the bow-tie would end up. But it's smack on the thumb hole - very odd.
--------------------
"If one tells the truth, one is sure sooner or later to be found out. " (Oscar Wilde)
"Today I bent the truth to be kind, and I have no regrets, for I am far surer of what is kind than I am of what is true." (Robert Brault)

smpecjak · « **Reply #3 on:** June 08, 2005, 11:46:28 AM »

Taken from Brunswick Insiders Web Page:
For those that wish to experiment with this layout. You will need to be very selective with the pin to CG distance. I start with the longest pin to CG distance I can with a minimum of 4 1/2 to 5 inches (this is very relative to the length of the bowlers span). Static weights are a concern and using the depth of the fingers and thumb will help keep the ball within legal limits of ball specifications.

Caution:
Reversing the flare will in many cases cause the track to flare over the thumb hole. To avoid this you need to lower the pin placement. The theory I was taught by Ray Edwards in the R & D department at Brunswick is to draw a line between the pin and the positive axis point. This line needs to be 1 1/2 inches beneath the backside of the thumb hole

JohnP · « **Reply #4 on:** June 08, 2005, 09:32:03 PM »

Rags -- The PAP through pin to the track line is just an approximation of the bowtie location. But for your bowtie to be in the middle of the thumb hole, your initial track has to pass over the thumb hole also. Are you releasing this ball differently from your others, or did you change spans or pitches? It sounds as if for some reason you are nearing a full roller release on this ball. -- JohnP

Ragnar · « **Reply #5 on:** June 09, 2005, 12:09:49 PM »

John, this sucker hits every hole. But, I intend to keep it for a very condition specific ball. Doesn't bounce much when it hits the holes, though you can hear it. Haven't changed anything about my release; with the same release everything else tracks an inch and a half (or close) away from thumb. I think it's just something to do with the ball core.
--------------------
"If one tells the truth, one is sure sooner or later to be found out. " (Oscar Wilde)
"Today I bent the truth to be kind, and I have no regrets, for I am far surer of what is kind than I am of what is true." (Robert Brault)

Author Topic: Where is the bow-tie? (Read 1692 times)

Ragnar

Where is the bow-tie?

JohnP

Re: Where is the bow-tie?

Ragnar

Re: Where is the bow-tie?

smpecjak

Re: Where is the bow-tie?

JohnP

Re: Where is the bow-tie?

Ragnar

Re: Where is the bow-tie?