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The term pap is an acronym for positive axis point. This is the spot on the ball around which the ball rotates after the initial release, before any flaring takes place.
Any rolling object has an axis point, but it can differ ( and does ) for each individual when it comes to throwing a bowling ball.
There are a few ways to find the pap, but the easiest for me was to take a NON-FLARING ball and use a piece of tape that highly contrasted the color of the ball so that it was easily visible. Place the tape on the positive side of your ball and throw it, watching the tape.
The tape should make a circular motion as the ball moves down the lane. Each time you throw the ball, move the tape towards the center of the circular motion until you achieve the spot where the tape appears to be stationary on the ball. That will be your pap.
The way to determine your pap measurments is to find your grip center and draw a line perpindicular to your grip centerline from your grip center past the pap, then draw a line from the pap down to this line so that it is perpindicular to the first line. Measure the line from you pap down to the first line. That will be the small number. Then measure from your grip center to the line from your pap. That will be the large number. As an example, you will end up with something like 5 1/8 over X 3/4 up, but it is different for everybody and these are for example only.
Now, as for the 5 X 3 stuff. Those are coordinates on the surface of the ball in relation to the pap. 5 X 3 denotes a place where the pin is 5 inches from the pap and the cg is 3 inches from the pap ( unless it is an asymmetrical ball, then the pin is 5 inches from the pap and the mb is 3 inches from the pap)
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