Does the measle cue ball cause more skids

I carried a Measles ball around for a few years (liked seeing the spin) - I stopped using it because it seemed to throw the OB a little more than others (and felt a little heavier). But I don't think more throw necessarily means more skids.

pj
chgo
I've found that the red dot throws object balls more. The Aramith Pro Cup after contact with object balls seems to proceed on a slightly different angle off cushions than the red dot.

I've found if you play with the red dot it's harder to segue to the Pro Cup. If you play with the Pro Cup it's easier to go to the red dot.
 
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pj
chgo

My opinion, I think the composition of the measle ball has more to do with how it plays than the weight. I also believe the expensive ones were through drilled and filled, the cheap ones probably surface drilled and a powder or similar was put in. The dots are less likely to go through the cue ball.

These are just opinions. My particular measles ball was worthless in my opinion. It didn't play like other cue balls and the measles ball never caught on enough around here to have to learn to play with it.

A bit of trivia, might not always be true. One big difference between cheaper sets and more expensive sets of balls is cure time and process. An expensive set might take 24 hours or more to cure. a cheap set a forth that long. I think one manufacturer might have claimed three days to cure their finest balls.

Hu
 
Ok, that's one way. I can think of an easier way: let the balls go from a shallow ramp. If there is a difference, the ball with a smaller moment of inertia will get to the bottom of the ramp first. See the animation here:


I have a little stimp meter I use for estimating table speed, but I think any ramp would have too much error (caused by placement and release forces) to measure moment of inertia differences between two cue balls.
 
I have a little stimp meter I use for estimating table speed, but I think any ramp would have too much error (caused by placement and release forces) to measure moment of inertia differences between two cue balls.
Agreed. I think the differences in the moments of inertia between two cue-balls are probably too slight to be measured with a ramp as short as the stimp meter. As you say, the stimp meter tells you more about the difference in rolling speeds between two tables than between two balls.

I think we would need a pretty long ramp to measure the perceived difference between the measles and red circle balls' rolling weight (moment of inertia).

Good eye.
 
Agreed. I think the differences in the moments of inertia between two cue-balls are probably too slight to be measured with a ramp as short as the stimp meter. As you say, the stimp meter tells you more about the difference in rolling speeds between two tables than between two balls.

I think we would need a pretty long ramp to measure the perceived difference between the measles and red circle balls' rolling weight (moment of inertia).

Good eye.
I had totally overlooked the (possible) moment of inertia issue with cue balls so thanks for raising it!

ChatGPT thinks suspending each ball with a thin wire to create a pendulum, and measuring the period of oscillation, is the best experimental way to evaluate the comparable moments of two equal size and mass balls.

Or for best results apparently MRI data can be used to numerically estimate moment of inertia.
 
I had totally overlooked the (possible) moment of inertia issue with cue balls so thanks for raising it!

ChatGPT thinks suspending each ball with a thin wire to create a pendulum, and measuring the period of oscillation, is the best experimental way to evaluate the comparable moments of two equal size and mass balls.

Or for best results apparently MRI data can be used to numerically estimate moment of inertia.


Oh lordy. Please let's not let ChatGPT do our thinking for us.
 
I have a tournament coming up that will be using the Measles CB so I started playing with one, swapping out the RC I usually play with.

My Measles came in blister packing from Aramith so I’m relatively sure it’s the real deal. And frankly I haven’t seen more skids. I do feel it plays a bit differently and takes a bit of adjustment, maybe like its composition is a bit softer and the finish a little less polished.

It’s fine, just a tad different.

Lou Figueroa
 
I carried a Measles ball around for a few years (liked seeing the spin) - I stopped using it because it seemed to throw the OB a little more than others (and felt a little heavier). But I don't think more throw necessarily means more skids.

pj
chgo
It would be heavier compared to the lower end and worn out cueballs in some random place, but they play livelier than several cueballs, like the one in the Centennial set and the Tournament set, I think there is one more that I found to feel deader than the measles ball but can't remember which one. I remember they used one of those deader and heavier playing balls in a Joss tour stop, and the players were having issues with speed control. I had a few losses due to position play being off and as I was talking about how the cueball reacted oddly a bunch of players including Mike Dechaine chimed in with the same thing. It acted similar to a heavier bar table ball, follow and draw would take odd curves and angles. They swapped out the balls that were on the tables with them for some reason but stopped doing that very soon after it started.
 
I have a tournament coming up that will be using the Measles CB so I started playing with one, swapping out the RC I usually play with.

My Measles came in blister packing from Aramith so I’m relatively sure it’s the real deal. And frankly I haven’t seen more skids. I do feel it plays a bit differently and takes a bit of adjustment, maybe like its composition is a bit softer and the finish a little less polished.

It’s fine, just a tad different.

Lou Figueroa


The catch is you don't know why it is a tad different or if the cue balls in the tournament will play the same as yours or not. One rail or two rails, there wasn't that much difference in the way mine played, three or four rails ... I hated to play one pocket with that thing!

My old mentor had a weighted cue ball under the counter. I don't know if there is any connection but that weighted ball also went wild coming off the third rail. It didn't seem noticeably different coming off of one or two rails. I had a lot of fun trying to make it work and sometimes two or three of us youngsters would spend hours just trying to predict what it would do coming off of the third rail. The usual test shot to see if the cushions were good showed the falseness of this cue ball too.

Back to the measles ball, I had a full set of new balls to compare that measle cue ball to and it seemed to have a higher sheen than even the white areas on the striped balls. It seemed more highly polished or like it had a final clear coat put on it after the dot rods were put in it then it was polished with that extra clearcoat. It closely resembles an automotive finish with extra layers of clearcoat on it.

All just speculation on my part. I don't have any inside information. I lost or gave away my measle ball so it is no longer handy to look at. I tried to give it away a handful of times and tossed it around in my junk containers for years. I don't see it now, could have disappeared in a hurricane too! Who knows, and I'm not losing any sleep over it.

Hu
 
It would be heavier compared to the lower end and worn out cueballs in some random place, but they play livelier than several cueballs, like the one in the Centennial set and the Tournament set, I think there is one more that I found to feel deader than the measles ball but can't remember which one. I remember they used one of those deader and heavier playing balls in a Joss tour stop, and the players were having issues with speed control. I had a few losses due to position play being off and as I was talking about how the cueball reacted oddly a bunch of players including Mike Dechaine chimed in with the same thing. It acted similar to a heavier bar table ball, follow and draw would take odd curves and angles. They swapped out the balls that were on the tables with them for some reason but stopped doing that very soon after it started.
The centennial set has a blue circle correct? It’s heavier. I know the old straight pool players always preferred it. They said it blew out the racks better.
 
I picked up a Measles Ball & noticed no difference between the Red Dot, Red Circle or Aramith ball.
I've noticed when I put it on the table for league practice the guys would take longer lining up the shot. What I observe is they're distracted by the dots & when they miss blame it on the Measles ball.
Another observation, the one's who complain the most are the lower average/quality players, the better players simply adjust.

.
 
The centennial set has a blue circle correct? It’s heavier. I know the old straight pool players always preferred it. They said it blew out the racks better.
OMG, dude. The blue circle is not heavier, its exactly the same weight of the Centennial balls.

Blue circle, Red circle, measle, Arcos2 measle, they all weigh 167/168 grams when new. The weight difference comes from age and use.
 
OMG, dude. The blue circle is not heavier, its exactly the same weight of the Centennial balls.

Blue circle, Red circle, measle, Arcos2 measle, they all weigh 167/168 grams when new. The weight difference comes from age and use.
The blue circle made by Hyatt for Brunswick was indeed slightly heavier and favored by straight pool players as a pack breaker.
The red circle, slightly lighter, was favored by 9-ballers.
All that is old news….there is no difference weight-wise any more by color coding for a long time.

….when I was a kid, there was also the green dot, also known as the Macon ‘fast draw’…had to be 1/4 ounce lighter.
 
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OMG, dude. The blue circle is not heavier, its exactly the same weight of the Centennial balls.

Blue circle, Red circle, measle, Arcos2 measle, they all weigh 167/168 grams when new. The weight difference comes from age and use.

It's not just the weight, it's how the balls move. There are a few that react heavier than others. The Tournament set played tougher than the Pro set as do the Centennials. It takes more muscle to move the cueball around.
 
Come on physics guy, what do you think? How would you test for variation of moments of inertia between the different cueballs?

Not that anyone cares in the world but the two of us, but I wasted some time the last few days thinking about moment of inertia. I think in general a fully solid ball with roll 1.67 times as far as a hollow ball, where each ball has the same mass, center of mass, and dimensions. The ratio of the distances rolled by a solid sphere to a hollow sphere is equivalent to the ratio of their accelerations under the same applied force. The acceleration of the solid sphere is (5/2)μg, while that of the hollow sphere is (3/2)μg, leading to a ratio of 5/3.

Here's the backup math:


Of course, two cue balls with dots or not will be much closer to the solid cue ball than the hollow sphere, but perhaps there could be some difference in play if the measles are a lot more dense than the white phenolic.

(edit: you can work out the equations in more detail using Dr. Dave's constants from his website).
 
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