Can one of you explain these numbers to me?

[fsbjcm]

I was in Dallas, TX this weekend and dropped by USA Bowl (Wick's Pro Shop) and bought myself a brand new Storm IQ Tour Fusion. They looked at my Mastermind, got an idea of my track, PAP, etc. and drilled it up. I really like it so far, although I didn't bowl great. It didn't help that I was on a sport pattern and didn't know it until the end of the 2nd game when I went in and asked the guy if the lanes were always this hard. Anyways, the guy gave me "my numbers" but I don't have any idea what they mean. Can anyone explain?

75 x 3 3/4 x 45

PAP= 5" over 1/4" up

I have some idea what a Positive Axis Point is, but no idea on the others.

[bowl1820]

75 x 3 3/4 x 45 PAP= 5" over 1/4" up

That's a dual angle layout

The first number (75°) is the Drilling Angle and measures the angle between a line (the reference line) drawn from the pin to the preferred spin axis (PSA/MB) of the ball and the line drawn from the pin through the PAP.

The Drilling Angle, affects the length of the skid phase of the ball. The smaller the number the sooner it rolls, the larger the number the later it rolls.

If the ball doesn't have a marked PSA/MB then typically the reference line is drawn from the pin through the CG.

The second number (3 3/4") is the Pin to P.A.P. measurement controls the amount of flare.

The third number (45°) is the VAL angle (Vertical Axis Line) and measures the angle between the line drawn (the reference line ) from the pin to the P.A.P. of the ball. The Vertical Axis Line (VAL) is a line perpendicular to the Grip Midline, through the Positive Axis Point.

It determines how fast the ball transitions through the phases of ball motion (Smaller the number the ball revs up faster and transitions quicker, larger the number the slower it does it).

Here's a chart with a example(now this layout will look slightly different on a ball, because a ball is sphere. But it shows the different parts)





click for 3D diagram

[fsbjcm]

So...

From the drilling angle the ball should have good length? It should have high flare? And it should transition slowly? Did I get that right? So basically it should go long and come in violently? Skid/snap?

[bowl1820]

Rob can tell you better, but it should have good length and angularity down the lane.

To learn more about the Dual Angle System read this:

Updated Dual Angle Guide.pdf
http://wiki.bowlingchat.net/wiki/ima...ngle_Guide.pdf

[fortheloveofbowling]

Google dual angle drilling and that will explain it. The lower the first number (75) the earlier it will want to roll !0% angle earliest 90% angle the latest. The second number 3 3/4
pin to pap is high flaring. The lower the last number (45) the faster the ball will rev up and transition at the breakpoint 20% fastest and 70% slowest. The drilling you have listed above would be a typical skid flip layout. Again, google dual angle drilling and it will explain everything.

[RobLV1]

Okay, I've held off presenting this before, but here goes. It is generally accepted that the more a ball flares, the more fresh surface is exposed to the lane so the more friction is present, and the more the ball hooks. So here's my hypothesis: If bowler A gets 3" of flare with 6 rings and the rings are 1/2" apart, and bowler B gets 6" of flare with 6 rings and the rings are 1" apart, does bowler B really get more fresh surface exposed to the lane? Of course not! Whether there is 1/4" of space between the rings of flare, or 1" of space, both bowlers have the same amount of fresh surface exposed to the lane. Could more flare really equate to a greater change in the axis migration? I think so!

[fortheloveofbowling]

All things being equal same ball, drilling, etc., bowler b with a greater distant between flare rings will see the ball change direction sooner than bowler a.

[RobLV1]

Exactly right. Because the amount of flare is a result of the bowlers release, in combination with the flare potential of the bowling ball.