Guys, you are close and on the right track. Think of having a core at a 45 degree angle at a pin distance of 3 3/8". It is in it's most unstable position, and, at rotation, will want to find a stable position. It takes the most movement to get it there. The overall reaction is the most violent. If you place the pin to PAP longer and higher, the core is stood up more initially, and track flare IS reduced. It does, however, provide a later amount of flare. Track flare at the end of a pattern will result in the ball making a sharper move right at the end (provided that the oil pattern allows the ball to read a dry area of the pattern soon enough). Higher pin placements are generally regarded as drier pattern drillings.A shorter pin to PAP distance lays the core down, and gets allows the ball to get into a forward roll quicker. However, since the core lays down quicker, the roll will be be with less entry angle on the backend. It again reduces track flare. Lower and shorter pin placements are generally regarded as heavier oil pattern drillings. BTW, a leverage drilling can also be very effective on an oiler pattern. Again, these are very general statements, but I hope it helps you to get the idea. I hope that this helps..........Gary
Edited on 3/3/2006 7:54 PM
Edited on 3/3/2006 8:02 PM
Edited on 3/3/2006 8:03 PM
