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    Dr. Dave ....

    I think the image presented on that page a little further down is a decent way to understand intuitively. If you have a more specific question, I can try to explain.
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    Dr. Dave ....

    See the longer answer from http://drdavepoolinfo.com/faq/cue/low-squirt section "Does an LD shaft allow me to put more spin on the cue ball?" Here's the most relevant snippet: So, standard shaft needs greater contact point offset for same spin as low-deflection shaft, and standard shaft has a...
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    Tony/Skyler trivia question

    Spoiled it too soon
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    2026 DCC 9-Ball Discussion

    They also depended on the tablet doing the right thing.. I started a couple matches before the tablet showed "start match". Often someone needed to come around to manually do something to get it ready first. By the end it seemed like they'd worked the issue out.
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    Derby City Banks and One Pocket

    He also briefly mentions his work in this interview from last year.
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    Shane Wolford VS Anthony Meglino (Action) $216K

    I asked, he said he tried to hit it slower and go 3 rails.
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    Pagulyan Carbon Fiber shaft?

    I hit with it for a minute. 12.2 diameter shaft with the medium tip. Played some hard center ball shots, some draw shots, and some max sidespin stop shots. The taper is very good. I'm not a fan of the conical taper on the Revo. The hit felt nice; to me it was a nice happy medium and felt very...
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    Derby city so few Pros

    It's about the same as 2018-2019. But they added a White Castle vending machine in the vendor hallway lmao. For the last couple days only one spot in the food court, "The Grill", has been open due to the snow. It's seriously rough.
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    What is a Shortstop?

    Dr. Dave’s rating comparison chart lists upper and lower shortstop. I think this ability level lines up pretty well with how people use the term.
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    Six Pointed Star

    I tried this tonght. Pattern 4 with the 2-ball on the head rail is very tough with all the balls frozen
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    Six Pointed Star

    * it’s the 4 to the 5. With the 4 that far off the rail, it’s tough not to catch the point. You’d have to cheat this to the thin side, or play some sort of stun follow. Depending on the 3rd shot, I’d probably avoid the bottom rail and just roll forward a diamond to take my medicine on the 5.
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    New way of measuring cueball deflection squirt angle?

    Cueball deflection depends on tip contact point offset. If I remember correctly, it’s close to linear. Imo it’s useful to have the contact point. In addition to the shaft being deflected, it sort of looks like the line parallel to the shaft is parallel to the tapered edge of the shaft, not the...
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    Pool Simulator "Show And Tell": 2x and 3x Cross Side Banks

    Yeah assuming things are perfectly rigid simplifies things and gives reasonable results if there isn’t a ton of deformation. But for situations where deformation is crucial, there are “soft body” simulations which basically split an object into lots of little pieces connected by springs. The...
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    Pool Simulator "Show And Tell": 2x and 3x Cross Side Banks

    Rail compression and multi-body collisions are definitely the two main difficult points of pool simulation. The theory of this model assumes the bodies "do not change configuration" during the collision, but there is an equation for displacement of the contact point during the collision. I've...
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    Pool Simulator "Show And Tell": 2x and 3x Cross Side Banks

    I'm writing a pool simulator for fun, and recently I improved the ball-rail collision model so that 2x and 3x cross side banks are more realistic! Videos are played back at 0.1x real time. Twice Across: Thrice Across: (Here's a recent, related AZBilliards post...
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    Fedor showing off...

    I was able to do this 5 rails finally.
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    My Fargorate progression

    I’ve got a 644 FargoRating and I happened to attempt this drill recently on a black-label Diamond with 4 1/8” pockets. It can be brutal going around the corner of the L. I think back-to-back success would be very difficult for me. Anyway, I’d like to give this challenge a try on a standard...
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    Detroit area pool halls

    I moved away, so I’m not sure. I doubt the atmosphere has changed significantly.
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    Detroit area pool halls

    I think The Rack in Livonia has the best tables. They added a bar recently.
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    DigiBall Update and Feature Question

    Earlier I said: But you just made me realize that actually, it should be able to measure throw angle even without a known shot angle, because it should be able to calculate the normal impulse and the tangential (frictional) impulse. This could also calculate the effective coefficient of...
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