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Search: Posts Made By: Bob Jewett
Forum: Main Forum Today, 05:39 PM
Replies: 705
Views: 21,130
Posted By Bob Jewett
Pat, evidently your horse is not high enough to...

Pat, evidently your horse is not high enough to let Lou see what you're saying. You may want to transition to a high elephant. Looks more comfortable, perhaps even with in-door plumbing....
Forum: Main Forum Today, 05:27 PM
Replies: 705
Views: 21,130
Posted By Bob Jewett
If you had a lot of data, like as much data as...

If you had a lot of data, like as much data as was gathered during all of JS's attempts, you could figure it out. The main data items based on stuff I've mentioned before are: % of break shots...
Forum: Main Forum Today, 05:24 PM
Replies: 36,375
Views: 22,049,402
Posted By Bob Jewett
For anyone who has had to drink instant coffee,...

For anyone who has had to drink instant coffee, there is no worse way to die.:D

Bob <-- grinds his own
Forum: Aiming Conversation Today, 12:51 PM
Replies: 7
Views: 122
Posted By Bob Jewett
Are you referring to bank shots? On bank shots,...

Are you referring to bank shots? On bank shots, speed can have a lot of effect on the angle of the ball coming off the cushion.

If you mean aiming simple cut shots, I don't think any aiming system...
Forum: Main Forum Yesterday, 05:15 PM
Replies: 34
Views: 597
Posted By Bob Jewett
Yes, like a bell. If the ringing is fairly slow,...

Yes, like a bell. If the ringing is fairly slow, like one cycle or less in the time the tip is in contact, a fair amount of energy can be lost in the tip-ball contact. If the ringing is a fairly high...
Forum: Main Forum Yesterday, 03:29 PM
Replies: 11
Views: 492
Posted By Bob Jewett
If the cue ball is bouncing from the power, the...

If the cue ball is bouncing from the power, the movement will be hops and the path between the touchdowns will be straight lines (through the air) with sharp turns at the touchdowns. There are some...
Forum: Main Forum Yesterday, 02:40 PM
Replies: 11
Views: 492
Posted By Bob Jewett
A cue ball with a lot of draw on slippery...

A cue ball with a lot of draw on slippery conditions keeps accelerating for a long time and I think sometimes that looks like multiple separate bursts because we aren't used to seeing the cue ball do...
Forum: Main Forum Yesterday, 12:01 PM
Replies: 34
Views: 597
Posted By Bob Jewett
Making a real "shell ball" is a problem. I think...

Making a real "shell ball" is a problem. I think it would tend to ring when struck in a way that a solid ball does not. To prevent that, you need a rigid, massless foam filler.

Unless I slipped a...
Forum: Main Forum Yesterday, 11:35 AM
Replies: 34
Views: 597
Posted By Bob Jewett
I can see that the extent of the curve might...

I can see that the extent of the curve might change, but wouldn't it remain a parabola? Would Coriolis's rule for masse shots still hold?
Forum: Main Forum Yesterday, 11:29 AM
Replies: 34
Views: 597
Posted By Bob Jewett
Manufacturing defects are going to be a lot less...

Manufacturing defects are going to be a lot less than the 4mm or so thickness of that shell unless someone leaves a set in the polisher over the weekend. Maybe rejects from a set of 2-inch balls.
Forum: Main Forum Yesterday, 11:21 AM
Replies: 27
Views: 937
Posted By Bob Jewett
Here is the start of what Jack Koehler had to say...

Here is the start of what Jack Koehler had to say about rail shots in his 1989 book, "The Science of Pocket Billiards". It is still in print and available from Seyberts, which is an AZB partner:...
Forum: Main Forum 10-23-2020, 09:04 PM
Replies: 285
Views: 16,914
Posted By Bob Jewett
Many of the things he pointed out in his paper...

Many of the things he pointed out in his paper had been demonstrated a long time before on the table. I think that the theory -- such as Shepard's paper -- flows from real experience and observation...
Forum: Main Forum 10-23-2020, 09:00 PM
Replies: 285
Views: 16,914
Posted By Bob Jewett
Gravity has nothing to do with throw other than...

Gravity has nothing to do with throw other than keeping the balls on the same level. Gravity is in the wrong direction to affect throw.
Forum: Main Forum 10-23-2020, 07:23 PM
Replies: 10
Views: 318
Posted By Bob Jewett
What strange answers.... There is a one...

What strange answers....

There is a one pocket league in this area. It is handicapped. I believe the format is round robin with the players arranging their own scheduling. It seems to be fairly...
Forum: Main Forum 10-23-2020, 07:18 PM
Replies: 705
Views: 21,130
Posted By Bob Jewett
I was referring to the WPA specs which are on...

I was referring to the WPA specs which are on their website. The BCA follows the WPA specs for official competitions but has a separate set for home tables not intended for tournament use.
Forum: Ask The Instructor 10-23-2020, 05:48 PM
Replies: 25
Views: 640
Posted By Bob Jewett
So if you can get the object ball to curve is it...

So if you can get the object ball to curve is it swath buckling? :D
Forum: Main Forum 10-23-2020, 05:33 PM
Replies: 705
Views: 21,130
Posted By Bob Jewett
1. So far as I know, there is no good spec for...

1. So far as I know, there is no good spec for table flatness near the pockets. There is a general spec, but it's fairly long-range. And there is no evidence that the slate was in any way doctored....
Forum: Ask The Instructor 10-23-2020, 05:16 PM
Replies: 25
Views: 640
Posted By Bob Jewett
I think the single point in the pocket for all...

I think the single point in the pocket for all shots is a better way to do it rather than have multiple targets changing for each shot. I think that most people are sending the center of the object...
Forum: Main Forum 10-23-2020, 02:39 PM
Replies: 705
Views: 21,130
Posted By Bob Jewett
I believe the plan was and still may be to make...

I believe the plan was and still may be to make 626 numbered commemorative sets with a signed piece of cloth in each set. I think a better price would be $100/set but I'm not very good at marketing.
Forum: Main Forum 10-23-2020, 01:38 PM
Replies: 285
Views: 16,914
Posted By Bob Jewett
I guess you mean that the simple ghost ball idea...

I guess you mean that the simple ghost ball idea needs to be modified for throw if you want the results to be useful in practice. Friction (throw) is already part of the modern theory of ball-to-ball...
Forum: Main Forum 10-23-2020, 11:46 AM
Replies: 48
Views: 1,324
Posted By Bob Jewett
The Bailiff: "Your honor, the next case is Mrs....

The Bailiff: "Your honor, the next case is Mrs. Irene Blanchard who is accused of beating her husband to death with one of his 873 pool cues."

His Honor: "How many innings?"
Forum: Main Forum 10-23-2020, 11:39 AM
Replies: 21
Views: 797
Posted By Bob Jewett
It is hard to make a ball with a light/heavy...

It is hard to make a ball with a light/heavy center. If you get the location off a little, the ball will roll off.

Many years ago I bought my own blue circle cue ball because all the cool players...
Forum: Main Forum 10-23-2020, 11:31 AM
Replies: 48
Views: 1,324
Posted By Bob Jewett
Do it right. Go for the whole shebang like Walter...

Do it right. Go for the whole shebang like Walter Lindrum:

560384
Forum: Main Forum 10-23-2020, 11:26 AM
Replies: 705
Views: 21,130
Posted By Bob Jewett
Oh, well. Fooled again. I still think you were...

Oh, well. Fooled again. I still think you were using magnets, though. That curving cue ball was the result of a switch left on when it shouldn't have been.

Bob <-- nearly all magnets come from...
Forum: Main Forum 10-23-2020, 10:39 AM
Replies: 705
Views: 21,130
Posted By Bob Jewett
In the interest of full disclosure, I in fact...

In the interest of full disclosure, I in fact have complete transcripts of all your secret meetings. That smoke detector in the Monterey Holiday Inn where you had your meetings was not a smoke...
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