AzBilliards.com secret to long table bank shots
 Page 2 of 2 < 12
(#16)
Bob Jewett
Northern California

Status: Offline
Posts: 15,683
vCash: 1700
Join Date: Apr 2004
Location: Berkeley, CA

04-14-2019, 10:56 AM

Quote:
 Originally Posted by FranCrimi ... What I do is draw an imaginary line from the ob to the bank rail. Then I find the midpoint on the rail to that pocket. Then I adjust incrementally (based on earlier testing of the rails) based on how close to bank rail the ob is.
I don't understand this. Here is what your description means to me up to the point of adjustment. Is this correct? X marks the midpoint.

Bob Jewett

(#17)
Patrick Johnson
Fish of the Day

Status: Offline
Posts: 18,714
vCash: 1700
Join Date: Jun 2007

04-14-2019, 11:05 AM

Quote:
 Originally Posted by FranCrimi What I do is draw an imaginary line from the ob to the bank rail. Then I find the midpoint on the rail to that pocket. Then I adjust incrementally (based on earlier testing of the rails) based on how close to bank rail the ob is.
Here's a way to figure the "equal angle" bank rail contact point with the ball and the target different distances from the bank rail.

The fraction of the "sideways" distance the ball travels to the bank rail is equal to the fraction of the total "vertical" distance it travels to get there.

pj
chgo

These are kicks, but the same principle works for banks.

(#18)
croscoe
Looking to Improve

Status: Offline
Posts: 337
vCash: 500
Join Date: Nov 2013
Location: Maine

04-14-2019, 12:10 PM

Quote:
 Originally Posted by Bob Jewett Another point for the OP to consider is that if you get spin on the object ball, it will change the bank angle and can be more than enough to miss (or make) the shot. Here is a demo of this idea. The eight ball is on the spot. The nine ball is exactly in the middle of the normal bank path. By using left or right side spin on the cue ball you can get right or left side spin on the object ball and then bank the eight ball on either side of the nine ball and still come back to the pocket. Sometimes you get side spin on an object ball just by it being a cut shot. In the diagram, you put side spin on the cue ball to transfer some to the OB. Attachment 517791

This is the point I was making. Left English on the cue ball as it arrives at OB can impart counterclockwise on object ball allowing you the short angle the shot. OB having spin goes wide if shot with light medium to slower speed. ( no flames we all judge speed slightly different I understand)

Last edited by croscoe; 04-14-2019 at 12:21 PM.

(#19)
FranCrimi
AzB Silver Member

Status: Offline
Posts: 3,642
vCash: 500
Join Date: Dec 2010

04-14-2019, 05:45 PM

Quote:
 Originally Posted by Bob Jewett I don't understand this. Here is what your description means to me up to the point of adjustment. Is this correct? X marks the midpoint. Attachment 517804
Right. The midpoint represents a perfect bank if the ob were on the bottom rail and there was no cb. So then I adjust my aim point to the left of the midpoint incrementally, based on how many diamonds up from the bottom rail the ob actually is. Sometimes the adjustment is 1 inch per diamond -- sometimes less, sometimes more, depending on how that rail is banking --- which I've determined before play starts.

Been Verified. Supporter of responsible teaching. Background checks for instructors, especially those who teach kids.

Last edited by FranCrimi; 04-14-2019 at 05:50 PM.

(#20)
FranCrimi
AzB Silver Member

Status: Offline
Posts: 3,642
vCash: 500
Join Date: Dec 2010

04-14-2019, 06:12 PM

Quote:
 Originally Posted by Patrick Johnson Here's a way to figure the "equal angle" bank rail contact point with the ball and the target different distances from the bank rail. The fraction of the "sideways" distance the ball travels to the bank rail is equal to the fraction of the total "vertical" distance it travels to get there. pj chgo These are kicks, but the same principle works for banks. Attachment 517805

Been Verified. Supporter of responsible teaching. Background checks for instructors, especially those who teach kids.

(#21)
bbb
AzB Gold Member

Status: Offline
Posts: 6,453
vCash: 1700
Blog Entries: 1
Join Date: Mar 2008

04-15-2019, 10:30 AM

Quote:
 Originally Posted by Patrick Johnson Here's a way to figure the "equal angle" bank rail contact point with the ball and the target different distances from the bank rail. The fraction of the "sideways" distance the ball travels to the bank rail is equal to the fraction of the total "vertical" distance it travels to get there. pj chgo These are kicks, but the same principle works for banks. Attachment 517805
could you explain alittle more how you came upon your fractions please?
i am alittle dense...

(#22)
Patrick Johnson
Fish of the Day

Status: Offline
Posts: 18,714
vCash: 1700
Join Date: Jun 2007

04-15-2019, 11:00 AM

Quote:
 Originally Posted by bbb could you explain alittle more how you came upon your fractions please? i am alittle dense...
For the example on the left (kicking to the corner pocket):

- The CB is 2 diamonds "vertically" from the kick/bank cushion, and the kick/bank cushion is 4 diamonds "vertically" from the target - so the CB's total "vertical" travel to the target is 6 diamonds, and the CB travels 1/3 of that total distance to reach the kick/bank cushion.

- If the CB travels 1/3 of its total "vertical" distance to reach the kick/bank cushion, it must also travel 1/3 of its total "sideways" distance (parallel to the kick/bank cushion) to get there.

The fractions of the CB's "vertical" travel distance are dictated by the position of the CB and the target. The fractions of the CB's "sideways" travel distance are chosen to match the fractions of "vertical" travel distance.

Hope that helps,

pj
chgo

Last edited by Patrick Johnson; 04-15-2019 at 11:02 AM.

(#23)
bbb
AzB Gold Member

Status: Offline
Posts: 6,453
vCash: 1700
Blog Entries: 1
Join Date: Mar 2008

04-15-2019, 12:59 PM

Quote:
 Originally Posted by Patrick Johnson For the example on the left (kicking to the corner pocket): - The CB is 2 diamonds "vertically" from the kick/bank cushion, and the kick/bank cushion is 4 diamonds "vertically" from the target - so the CB's total "vertical" travel to the target is 6 diamonds, and the CB travels 1/3 of that total distance to reach the kick/bank cushion. - If the CB travels 1/3 of its total "vertical" distance to reach the kick/bank cushion, it must also travel 1/3 of its total "sideways" distance (parallel to the kick/bank cushion) to get there. The fractions of the CB's "vertical" travel distance are dictated by the position of the CB and the target. The fractions of the CB's "sideways" travel distance are chosen to match the fractions of "vertical" travel distance. Hope that helps, pj chgo
very help full.....
now i get it
thanks patrick....

 Page 2 of 2 < 12

 Thread Tools Rate This Thread Rate This Thread: 5 : Excellent 4 : Good 3 : Average 2 : Bad 1 : Terrible

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Main Category     Main Forum     Live Stream Area     Wanted/For Sale         For Sale Items         eBay Auctions         Wanted     Room Owner Discussion     14.1 Pool     Canadian Pool     Snooker     Carom Billiards     Memories of Steve Mizerak     English Pool     Billiard and Pool History in the U.S.     BEF Juniors Pool     Non Pool Related     Test Area     Cuesports: Rules & Strategies     AzB Hall of Fame     Pool Room Reviews Tournament Talk     U.S. Tournament Announcements     European Tournament Annoucements     Asian Tournament Announcements     Super Billiards Expo     Junior National 9-Ball Championships     World Championships     US Open Championships     Derby City Classic/Southern Classic     BCAPL 8-Ball Championship     US Bar Table Championship     WPBA     Matchroom Events     Eurotour     Other Tours & Events Products Talk     Pool Tables and Accessories Reviews     Cue Reviews     Cue and shaft reviews     Cue Case Reviews     Cue Machinery and Supplies     Cue & Case Gallery     Ask The Cuemaker     Cue Accessory reviews     Other Item reviews     Talk To A Mechanic Instruction & Ask the pros     Aiming Conversation     George 'Ginky' San Souci     Instructional Material reviews     Instructor Reviews     Melissa Morris     Sarah Rousey     Ask The Instructor