Board index » General Forums » Ball Talk




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Not quite so simple
 Posted: Fri Feb 02, 2018 9:20 pm Post Number: #1 Post
Offline
BCU Graduate Layouts

Joined: October 2, 2016
Posts: 34
Location: Hannover, Germany
Reputation: 0
Reputation Power: 1
Hey everyone !

after reading several articles about ball motion from the forums wiki, i stuck at this sentence from the "Not quite so simple" article by Mo:

Ball reaction is the accumulated effect of......

•The position of the pin to spin line in relation to the migrating axis of rotation of the ball.

What is the "pin to spin line" ?

Thanks for explanation.


Top 
 Profile  
Reply with quote  
 Post subject: Re: Not quite so simple
 Posted: Fri Feb 02, 2018 9:45 pm Post Number: #2 Post
Offline
Senior Member
User avatar

Joined: July 9, 2012
Posts: 1335
Location: Central Florida
Reputation: 462
Reputation Power: 5
PlainUgly wrote:
What is the "pin to spin line" ?


A line drawn from the Pin to PSA is known as the pin to spin line.

Mo Pinel wrote:
The pin to spin line (line from the low RG axis to the high RG axis).

_________________
Click my green + rep button if this helps!
"REMEMBER, it isn't how much the ball hooks, it's where."


Top 
 Profile  
Reply with quote  
 Post subject: Re: Not quite so simple
 Posted: Fri Feb 02, 2018 10:44 pm Post Number: #3 Post
Offline
BCU Graduate Layouts

Joined: October 2, 2016
Posts: 34
Location: Hannover, Germany
Reputation: 0
Reputation Power: 1
ahh, ok, thank you.

Why doesnt call it the "base line" like in his Dual Angle Guide ? Its the same, isnt it ?

May i ask how the "pin to spin line " and "the axis migration path" work together for ball motion ?

the axis migration path will tend to stay in direction of the same RG value ( of the PAP ) migrating to the low rg axis while runnig down the lane, right ?

So its about the angle of the pts-line to the migration path or the distance or when they perhaps intersect ?

Hard to get it for me... :cry:


Top 
 Profile  
Reply with quote  
 Post subject: Re: Not quite so simple
 Posted: Sat Feb 03, 2018 1:21 am Post Number: #4 Post
Offline
Member

Joined: November 21, 2014
Posts: 653
Location: Hong Kong
Reputation: 17
Reputation Power: 1
The migration direction seems to by affect by differential ratio of the drilled ball.

Page 45 - 50

http://wiki.bowlingchat.net/wiki/images ... eminar.pdf

_________________
Adrian
Right handed

(Sep 2018)
PAP: 5 1/8 up 3/4
Speed: 15.5 mph (Kegel Specto)
Rev: 350 RPM
Axis tilt: 18-20*
Axis rotation: 60*


(Old)
PAP: 5 5/8 up 3/4
Speed: 14 mph off hand
Rev: 300 RPM
Axis tilt: 15*
Axis rotation: 60*


Top 
 Profile  
Reply with quote  
 Post subject: Re: Not quite so simple
 Posted: Sat Feb 03, 2018 3:53 am Post Number: #5 Post
Offline
Senior Member
User avatar

Joined: July 9, 2012
Posts: 1335
Location: Central Florida
Reputation: 462
Reputation Power: 5
PlainUgly wrote:
ahh, ok, thank you.

Why doesnt "HE" call it the "base line" like in his Dual Angle Guide ? Its the same, isnt it ?

Because it's being used in a different context for what's being discussed.

In the Dual Angle guide it's just called the "Base line" because it's talking about laying out balls and that line is what the layout is "based" off of.

(Also if you look at the Guide the baseline is located/drawn differently depending on if the ball is a Asym. or a Sym. so you couldn't really call it the pin to spin line in both cases.)

It's like the starting line on a racetrack, at the start of the race it's called the "starting line" at the end of the race it's called the "finish line". It's the same line it's just being referred to differently because it's being used in a different context.
Image

_________________
Click my green + rep button if this helps!
"REMEMBER, it isn't how much the ball hooks, it's where."


Top 
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 5 posts ] 

Board index » General Forums » Ball Talk


 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: