Skid /Flip Question

[Stampy79]

Ok, Assymetrical Core

When you put the MB right in the thumb as opposed to 2 in right of centerline, what is the diff in these two layouts ? Lets just say the pin is 2 in above the ring finger directly above it ! and the only diff is the mass bias location ! Let me hear your theories. Thx guys

[TRIO1STL]

In simple terms, the more you move the mass bias right of the thumb, the stronger the back end reaction. Strong position is half way between the thumb and the val. Once you pass the half way point, the earlier the roll.

Mass bias position also will effect back end reaction. Strong position will give you the strongest move at the break point. Moving the mass bias more towards the val will smooth out the back end while creating earlier read.

Early roll drills include 45 degree, 25 degree and zero degree.

Do not put the mass bias to the left of the thumb for a right handed bowler unless the ball speed is very slow. Very weak drill.

Hope that helps.

Trio Bowlers Supply
210 Fee Fee Hills Dr.
Hazelwood,MO. 63042

Thanks,Trio1stl

[bluerrpilot]

You should not use the thumb as a reference point for the mass bias. Its either an angle from the pin to mb line or a distance from the track or VAL.

Lets say that 2" right happens to be around 45* then that ball will have an earlier roll to it and somewhat hook set off the spot. If the mb falling in the thumb puts it closer to 60* then it will become more angular off the spot. Once it starts passing 75* it will smooth out and become more arcing.

The sweet spot for the most flip should put the MB right between the track and VAL


By the way....Happy Birthday Stampy

[Stampy79]

Thx Blue and yea I know the reference was a bit vague, but I have a problem with trying to determine how to drill my second BWB. The first one has a drilling total of 45 (25/20) on Moes scale. It does as advertised, it revs up early and hard. Now I think I am gonna go with a 120 which will be in the middle of the other half of the spectrum. I want it to go long but a big backend ! So I guess I will go about65x55 with a 4 7/8 pin. I want it to still make that corner when the time comes ! :D What do you think ?

[TRIO1STL]

Depending on your axis coordinates, I think you would be happier with 55/35. The higher degree you go on your drill angle, the more skid you create. The pin to val angle is for pin placement and back end shape.

I laid out the coordinates on a ball using the pap of 5 over and 1 up. 55/35 would put the fingers over the bridge with the mass bias in the strong position.

65/55 will create a little earlier roll with the pin 3" above the mid line which means that you would more than likely drill into the pin. Decreasing your pin to val angle would raise the pin to a more desirable location.

Again, depends on your pap coordinates and also pin distance on the ball you are using.

Trio Bowlers Supply
210 Fee Fee Hills Dr.
Hazelwood, MO. 63042

[bluerrpilot]

Good 'ol dual angle......I don't use it very often so I cant visualize the layouts you guys are describing. So for me, I would drill it 5 1/2 x 5 and watch it turn left at 45 feet

[TRIO1STL]

I agree. If you look at the chart that is listed on the dual layout it tells you what the pin to pap and pap to mass bias distance is. I made a chart about 5 years ago using different pin to pap placements and the distance to the mass bias. Made laying out a ball much quicker.

The dual system is just another method of the same. I always used the degree system myself.

Have a great day.

Trio Bowlers Supply
210 Fee Fee Hills Dr.
Hazelwood, MO. 63042