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Search: Posts Made By: Bob Jewett
Forum: 14.1 Pool Yesterday, 08:28 PM
Replies: 3
Views: 89
Posted By Bob Jewett
Why do your runs end? Without knowing that, it's...

Why do your runs end? Without knowing that, it's really hard to say.

Very, very standard advice is to work on your weaknesses. If we don't know what they are, it's really hard to suggest...
Forum: Ask The Instructor Yesterday, 02:32 PM
Replies: 5
Views: 136
Posted By Bob Jewett
The usual specification of balance point is how...

The usual specification of balance point is how far it is from the bumper. The actual important distance is how far it is from the tip.
Forum: Main Forum Yesterday, 09:48 AM
Replies: 25
Views: 751
Posted By Bob Jewett
If you find dead cushions, it's not a deal...

If you find dead cushions, it's not a deal breaker but it is a bargaining point. If you're going to have to replace the rubber -- the seller has to see the problem -- a lower price is justified. You...
Forum: Main Forum Yesterday, 09:38 AM
Replies: 41
Views: 891
Posted By Bob Jewett
That's what Paul Schofield does in his...

That's what Paul Schofield does in his tournaments. You may want to look up his previous extensive comments about the other details.

The break at nine ball is broken. The winner of the match...
Forum: Main Forum Yesterday, 09:32 AM
Replies: 41
Views: 891
Posted By Bob Jewett
On the Eurotour the tables are "tapped" or...

On the Eurotour the tables are "tapped" or "trained". There are craters that have been pounded into the cloth for the balls to sit in. The has been the standard on the Eurotour for years. No rack....
Forum: Main Forum 10-26-2020, 06:24 PM
Replies: 35
Views: 745
Posted By Bob Jewett
Because it's totally confusing to use the same...

Because it's totally confusing to use the same word for both. The effects are quite different.

The UKers say "check side" for inside english, but it's also "check side" when the same cue ball gets...
Forum: Ask The Instructor 10-26-2020, 03:58 PM
Replies: 5
Views: 125
Posted By Bob Jewett
Yup. It looks to me like the cue ball will hit...

Yup. It looks to me like the cue ball will hit the 8 if you just roll it without side spin. There's a good chance the 8 will stop the cue ball for a good shot. Put the effort into aiming and not...
Forum: Main Forum 10-26-2020, 03:52 PM
Replies: 23
Views: 746
Posted By Bob Jewett
Measuring is probably the simplest way to find...

Measuring is probably the simplest way to find the difference. Here is how that might be done, but it would require tip changes and multiple shafts to get a good answer:...
Forum: Main Forum 10-26-2020, 03:21 PM
Replies: 11
Views: 399
Posted By Bob Jewett
Open at 11:30AM Thurs-Sun and close at midnight...

Open at 11:30AM Thurs-Sun and close at midnight or 1AM. Closed Mondays.

Edit: Edgie's in Milpitas seems to be open as well.
Forum: Main Forum 10-26-2020, 03:09 PM
Replies: 23
Views: 746
Posted By Bob Jewett
In general a higher sos will mean that there will...

In general a higher sos will mean that there will be better energy transfer from stick to ball.

sos is not directly related to density. There are some pretty good on-line references that even...
Forum: Main Forum 10-26-2020, 03:06 PM
Replies: 35
Views: 745
Posted By Bob Jewett
Running refers to how the cue ball rubs on the...

Running refers to how the cue ball rubs on the cushion. Running makes the ball go faster and more parallel to the cushion after contact. Running has nothing to do with the object ball. Reverse is the...
Forum: Main Forum 10-26-2020, 11:22 AM
Replies: 23
Views: 746
Posted By Bob Jewett
Here is the speed of sound comparison for maple...

Here is the speed of sound comparison for maple and ash. The numbers are in meters per second.

560616

A forest products site points out that this will change due to moisture content and other...
Forum: Main Forum 10-26-2020, 10:37 AM
Replies: 23
Views: 746
Posted By Bob Jewett
If you use only an open bridge, the grain/dirt is...

If you use only an open bridge, the grain/dirt is less noticeable. The snooker shafts of the pros are stained so you can really see the "chevrons" in the grain.

According to a handbook I have, the...
Forum: Carom Billiards 10-26-2020, 10:29 AM
Replies: 2
Views: 168
Posted By Bob Jewett
Oops. I wrote the below thinking I was in some...

Oops. I wrote the below thinking I was in some other forum. I have certainly never heard of a carom table rental for homes. If you could find a table dealer that has an old table they would rather...
Forum: Main Forum 10-25-2020, 05:39 PM
Replies: 745
Views: 22,705
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 10-25-2020, 05:27 PM
Replies: 745
Views: 22,705
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 10-25-2020, 05:24 PM
Replies: 36,392
Views: 22,055,964
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 10-25-2020, 12:51 PM
Replies: 7
Views: 231
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 10-24-2020, 05:15 PM
Replies: 34
Views: 625
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 10-24-2020, 03:29 PM
Replies: 11
Views: 514
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 10-24-2020, 02:40 PM
Replies: 11
Views: 514
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 10-24-2020, 12:01 PM
Replies: 34
Views: 625
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 10-24-2020, 11:35 AM
Replies: 34
Views: 625
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 10-24-2020, 11:29 AM
Replies: 34
Views: 625
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 10-24-2020, 11:21 AM
Replies: 27
Views: 1,046
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:...
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