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Author Topic: Mass bias placement (Read 2402 times)

Sg7391

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Mass bias placement
on: May 18, 2017, 02:00:11 PM
Has anyone tried placing the mass bias in ones ball track???

itsallaboutme

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Re: Mass bias placement
Reply #16 on: June 15, 2017, 09:00:01 PM
In the track is ok, just don't make the mistake of going past the track. Then you screw with the flare and it won't hook.

J_w73

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Re: Mass bias placement
Reply #17 on: June 16, 2017, 10:29:06 AM
Whaaaa.......^^^^^^this post makes no sense.  PSA in the track does not reduce flare it just takes longer for the core to stabilize.  The PSA migrates until it becomes the axis point.  The only thing that reduces flair is a pin position less than 2.75" in an asym.

MB position has nothing to do with pin position in relation to PAP.  That can be manipulated any way you want.   You can have the MB in the track & a 5" pin if you want.

Are you saying that on the lane the PSA migrates and becomes the axis? This never happens on the lane.  It can happen with high rpm on a determinator.  You can look at the flare rings or look at some blueprint track and axis analysis and see that.

I think you may be correct about about my comment about the MB in the track creating low flare. It is probably more of the short pin to pap creating the low flare.  But the position of the MB does influence the amount of flare as well.  That is why with asymmetrical balls you can have a 5 or 5.5 inch pin and still get massive amounts of flare when you put the MB in an unstable position, 3 3/8 to 4" from the PAP.

375 RPM, 17-18 MPH, 45+ DEG AXIS ROTATION, 17 DEG TILT

Channelsurfer

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Re: Mass bias placement
Reply #18 on: June 16, 2017, 12:31:53 PM
Everything influences track flare....pin position, mb, balance hole location, depth of balance hole and depth of gripping holes.......why it's important to have someone that understands that when they drill you an asym.    You get large track flare with any drilling with a pin position between 2.75" & 6.75" on an asym.


PSA may not  get to the point of becoming the axis before it gets to the pins but that is what it is trying to do.  Spin time will never be fast enough for the core to stabilize before it gets there........and if it does you are throwing the wrong piece of equipment.   
Last Edit: June 16, 2017, 12:37:08 PM by Channelsurfer

Juggernaut

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Re: Mass bias placement
Reply #19 on: June 17, 2017, 07:27:28 AM
Spin time will never be fast enough for the core to stabilize before it gets there........and if it does you are throwing the wrong piece of equipment.   

 I think you are incorrect in this.

 I had a symmetric ball that always finished by spinning up with the thumbhole on the axis as it entered the pocket. On a symmetric ball, after drilling, the thumbhole becomes the psa most of the time.

 If a symmetric ball can manage to find its psa before reaching the pins, I have to figure a ball with an even stronger psa, set closer to the pap to start with, would also find its psa before reaching the pins.

 (Oddly enough, I also own a ball with a long pin out distance of 5 1/4 inches, drilled pin way up and label in Palm, that spins up on the finger holes as the psa. Weird, but ball works great, and also spins up before reaching the rack)

Strapper_Squared

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Re: Mass bias placement
Reply #20 on: June 17, 2017, 11:22:43 AM
You are really talking about the drill angle in the dual angle layout system.  This angle (relative to PAP) impacts the length of the ball before hooking:

The Drilling Angle, affects the length of the skid phase of the ball.  The higher the drilling angle, the longer the skid phase of the ball.  The smaller the drilling angle, the quicker the transition into the hook phase of the ball.  The drilling angle limits are 10-90

Depending on your PAP location, a MB in your track could exceed the max recommended drill angle (greater than 90 deg).  Beyond my knowledge level to answer what happens for drill angles over 90 deg, but assume it makes the ball very condition specific and not roll particularly well for a majority of bowlers.

S^2
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Channelsurfer

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Re: Mass bias placement
Reply #21 on: June 17, 2017, 02:11:16 PM
Spin time will never be fast enough for the core to stabilize before it gets there........and if it does you are throwing the wrong piece of equipment.   

 I think you are incorrect in this.

 I had a symmetric ball that always finished by spinning up with the thumbhole on the axis as it entered the pocket. On a symmetric ball, after drilling, the thumbhole becomes the psa most of the time.

 If a symmetric ball can manage to find its psa before reaching the pins, I have to figure a ball with an even stronger psa, set closer to the pap to start with, would also find its psa before reaching the pins.

 (Oddly enough, I also own a ball with a long pin out distance of 5 1/4 inches, drilled pin way up and label in Palm, that spins up on the finger holes as the psa. Weird, but ball works great, and also spins up before reaching the rack)

Syms lose tilt faster than asyms.  It is close to but not quite completed stabilizing if it's striking.  Ideally you would want the ball to hook out at the exact moment it hits the pins.  If it hooks out (stabilizes) before hitting the pins........you are using the wrong piece of equipment. 
Last Edit: June 17, 2017, 02:23:16 PM by Channelsurfer