Just took a quick cursory look at the information there and it looks voluminous!
I will get to it.
Anyway I've probably bored most to tears. Mine won't be that long, four or five total posts.
Oh, where did my information come from.
1. Revolutions 2
2. Mo Pinel See if, Feel it, Do It.
3. MoRich drill sheets.
4. Brunswick drilling sheets and Seven Popular drill layouts.
5. Gravity Balance system from Lane#1
6. Ebonite technical posts including weight hole item.
7. Core descriptions from
www.bowlingballreviews.com8. Denny Torgenson materials both purchased and read.
9. Mario of Rollrite UK, who uses a lot of Denny Torgenson concepts
10. Synthesis of all above by my pea brain.
11. Experiments on the lane and a very detailed sports eye.
Before I go any further I want to state I agree with much of what is in Revolutions 2 but I think that one must realize that at the time written Chip Zielke had primarily been with Brunswick and it is primarily an excellant compilation of Brunswick positions on drilling and theory.
What is below is my compilation of what I have found works and effects ball roll for me and from watching many other bowlers and their drillings.
Oh the question, why all that core stuff above!? Well I think it is important for a bowler to know if you have an extreme core, and if you do at one end of the spectrum are you? Or do you have a middle of the road type of core.
It is going to be important for one to understand that if they are at an extreme end of the spectrum. Which drillings and why are probably going to be good or bad for that ball.
For example The Vortex 2 particle above. This is an extreme ball.
Strongest coverstock, lowest rg, strong high differential with dense sharp edged flip blocks all leads to strength in all parts of the lane.
To place and early roll drilling and then add more flip with a weightblock may lead us to create a ball that can only be used once every two to three years!
The same with the opposite end of the spectrum Reaction Rip. To take this ball and drill it to go super long and flip might overemphasize the properties of this ball and get a skid flip reaction that always looks exciting but maybe might not match up very often to most lane conditions.
So onward to drilling configurations.
The most important spec in drilling is pin to pap distance!
The chart contained both in Revolutions 2 and in Mo Pinel's material is the following.
Pin to Pap distance.
0 no flare extremely early roll, lowest rg drilling
1 1/8 inch = 1/3 flare potential of the core early roll drilling
2 1/4 inch = 2/3 flare potential of the core EARLY roll drilling
3 3/8 inch = 100% of the core flare potentila, flare early mids and late.
4 1/2 inch = 2/3 flare potential of the core later on the lane than the 3 3/8.
5 5/8 inch = 1/3 flare potential of the core later on the lane than the 4 1/2.
6 3/4 inch = 0 flare potential but pin is in the initial track, this is the highest rg drilling.
To elaborate a little on the extremes above. Chip Zielke in Revolutions 2 gives a great example of a weight block being like a rolling pin.
a pin on pap drilling or a 0 pin to pap distance is much like taking your rolling pin(weight block) laying it completely on its side and rolling it accross the floor(or lane in this case). The ball rolls much easier as whatever the low rg of the ball is the statistic you are now using.
Your rolling pin looks like this.
xxxxxxxxxxx|---------------------------|
xxxxxxxxxxx|..................................|
xxxxxxx|.............................................|
xxxxxxxxxxx|..................................|
xxxxxxxxxxx|---------------------------|
Laying straight on its side. In the example of the Vortex 2 particle above if drilled like this the ball has an RG of 2.46 right now. It is using it's low RG or what is called it's X or horizontal coordinate. To measure the ability of the ball to roll. Also since the pin is completely stable there is no tendancy of the pin to migrate to a stable position therefore the flare is 0.
If we drill the Reaction Rip like this the ball will have an rg of 2.584.
Also with no flare potential.
Now lets say we stand both these cores, weight blocks, or rolling pins vertical balls up and place the pin 6 3/4 from the PAP. Now the weightblock is standing straight up. Vertical. The y coordinate or height now takes over. This ball will resist rolling compared to the other one with the rolling pin on its side.
After all the weight block is standing straight up.
The rolling pin looks like this.
....|
.|......|
.|......|
.|......|
.|......|
.|......|
.|......|
.|......|
.|......|
....|
In the examples given above The Vortex II particle is now rolling with an RG of
2.46 +.046 (differential,more on this later)= 2.506 rg. This is the highest rg drilling for this ball. Or the most resistant to rolling drilling for this ball.
For the reaction Rip this drilling will be 2.584. + .057 = 2.641.
This ball will resist rolling in comparison to it's low rg drilling of 2.584, it will also resist rolling quite a bit in relation to even the high rg drilling of the Vortex II particle.
As far as ability to roll the reaction rip when drilled staight up in the track, will have about the same rg as a scout reactive when drilled 0 pin to pap. In other words. A scout reactive when drilled 0 pin to pap will have an RG of 2.635 the Reaction Rip when drilled 6 3/4 will have an rg of 2.641.
One with the weightblock sideways, the other with the weightblock straight up!
Neither ball will flare! As there is no imbalance.
Now how do we create imbalance!
Well the easiest way is to create maximum imbalance!!! Let's put the pin about 1/2 of the way in between both stable positions.
3 3/8 from the PAP. This is 1/2 of the distance from stable on the PAP or 1/2 of the distance from stable in the track!
This ball when drilled like this is going to want to attempt to migrate towards stability!
(To be continued soon).
Lucky
Anyway
Edited on 12/27/2003 1:38 PM
Edited on 12/27/2003 1:39 PM
Edited on 12/27/2003 1:40 PM
Edited on 12/27/2003 1:41 PM
Edited on 12/27/2003 1:42 PM