Search found 3432 matches

by JohnP
July 23rd, 2019, 3:02 pm
Forum: Layout Advice
Topic: PAP Question
Replies: 2
Views: 331

Re: PAP Question

Go back to the lanes with an observer. Mark the PAP location on each ball and throw it with the observer watching carefully to be sure the tape is stationary when the ball hits the lanes. If it's not, adjust the tape position until it is. It's easy to miss the very first oil ring, especially if the ...
by JohnP
July 23rd, 2019, 2:52 pm
Forum: General Bowling
Topic: Skip flip ball reaction
Replies: 12
Views: 675

Re: Skip flip ball reaction

I wanted a skid/flip reaction until I got one. Every time I threw that ball like I wanted to, just as it was ready to roll into the pocket it jumped through the nose. Worthless for me. -- JohnP
by JohnP
July 17th, 2019, 4:47 pm
Forum: General Bowling
Topic: Switch to lefty progress
Replies: 23
Views: 1402

Re: Switch to lefty progress

The other day, my wife said she could almost see a muscle, but it turned out to a mosquito bite and favorable lighting
LMAO! I'm going to steal this one. -- JohnP
by JohnP
July 15th, 2019, 4:25 pm
Forum: General Bowling
Topic: Switch to lefty progress
Replies: 23
Views: 1402

Re: Switch to lefty progress

After a chat with my local PSO, I took his suggestion to drop down to 14 pounds since my left hand and arm will not be as strong in the beginning. He gave me a great deal on a used, single-drill Pitch Black. Thursday was my first day out with the ball. There were some bad shots and there were many ...
by JohnP
July 6th, 2019, 4:19 pm
Forum: The Pro Shop
Topic: Plug cutting jig
Replies: 11
Views: 1147

Re: Plug cutting jig

I found 3/4" dia x #10 thread @ the site linked below. A quick trip to a hardware store will show you what's readily available and perhaps you'll find a better alternative. -- JohnP https://www.fastenersuperstore.com/products/carriage-bolts-steel-zinc-full-thread?pid=6001" onclick="window.open(this....
by JohnP
July 5th, 2019, 4:01 pm
Forum: The Pro Shop
Topic: Plug cutting jig
Replies: 11
Views: 1147

Re: Plug cutting jig

By the way, if you were to decide to try the three screws, use carriage bolts instead - they don't have any slots so there's no way to scratch the ball. -- JohnP
by JohnP
July 4th, 2019, 3:29 pm
Forum: The Pro Shop
Topic: Plug cutting jig
Replies: 11
Views: 1147

Re: Plug cutting jig

Any shield you use will have to be large enough in diameter to cover the entire plug + extra diameter to allow moving the cutter around. That diameter will be very close to the diameter of the shield I gave you the link for. If you go with the three screws I wouldn't recommend using anything on the ...
by JohnP
July 3rd, 2019, 4:26 pm
Forum: The Pro Shop
Topic: Plug cutting jig
Replies: 11
Views: 1147

Re: Plug cutting jig

A lot of shops use a router with the shield you'll see at the link below. Adjust the height of the bit to the surface of the ball, possibly using a height about half the amount you want to remove first, then a finish cut. I'm not sure how (or if) a Dremel tool would work with one. -- JohnP http://in...
by JohnP
June 9th, 2019, 2:30 pm
Forum: The Pro Shop
Topic: New USBC rule disastrous for two handers in symmetrics
Replies: 13
Views: 1725

Re: New USBC rule disastrous for two handers in symmetrics

A thought on how to know where the post-drilling psa will be. -- JohnP

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by JohnP
May 17th, 2019, 7:57 pm
Forum: Layout Advice
Topic: Very low DA / lower sum layouts
Replies: 14
Views: 863

Re: Very low DA / lower sum layouts

Did you actually weigh the ball with the layout drawn on it? If not, draw the layout you're interested in on the surface, then check the weights on a dodo scale. They will be very close to what they'll be after the ball is drilled, except for top weight, and you have some control of that by the dept...
by JohnP
May 17th, 2019, 2:19 pm
Forum: Layout Advice
Topic: Very low DA / lower sum layouts
Replies: 14
Views: 863

Re: Very low DA / lower sum layouts

I dug out an Absolute Inferno with a MB kicked left...way left. Higher TW, so not a ton of flexibility since I'm ditching weight holes now to get used to it. Remember, with the new balance regs you're allowed 3 oz of imbalance in all directions. High top weight isn't much of a problem as long as yo...
by JohnP
May 10th, 2019, 9:32 pm
Forum: Layout Advice
Topic: No-thumb thumb hole
Replies: 2
Views: 363

Re: No-thumb thumb hole

With the Detroit half-thumbers I've drilled for (just a couple) the thumb hole is used to grip. My thoughts on the huge thumb hole is not to use it to grip, just let it lay inside of the hole instead of outside. The track should be about the same as without the hole. Also, the small half-thumb would...
by JohnP
May 10th, 2019, 4:02 pm
Forum: Layout Advice
Topic: No-thumb thumb hole
Replies: 2
Views: 363

No-thumb thumb hole

There are no limits on hole diameter or depth for gripping holes. What would happen for a no-thumb bowler if a huge diameter "thumb hole" (say, 1 1/2" or even larger) was drilled, pitching it in the direction the thumb lays on the ball (reverse and left for a right-hander)? First, would the release ...
by JohnP
May 9th, 2019, 4:09 pm
Forum: Layout Advice
Topic: hustle ink layout for short oil low volume dry
Replies: 14
Views: 1547

Re: hustle ink layout for short oil low volume dry

Decide what layout you want, then ask the driller to let you lay the ball out. -- JohnP
by JohnP
May 9th, 2019, 4:05 pm
Forum: Layout Advice
Topic: RG of the PAP
Replies: 22
Views: 1378

Re: RG of the PAP

Final RPM (calc) => 23.47'/sec = (23.47 x 60)/2.23 = 631.5 rpm
From the data on the TV broadcasts Belmo gets around 550 RPMs, so even it revs up when it rolls. The less revs a bowler has the more dramatic the increase will be. -- JohnP
by JohnP
May 8th, 2019, 4:23 pm
Forum: Layout Advice
Topic: RG of the PAP
Replies: 22
Views: 1378

Re: RG of the PAP

Darkhorse's calculations are confirmation of the verbal explanation in my earlier post, except that he didn't take axis tilt (reduced initial diameter of the track) into account in the original RPM calculation. -- JohnP
by JohnP
May 6th, 2019, 3:51 pm
Forum: Layout Advice
Topic: RG of the PAP
Replies: 22
Views: 1378

Re: RG of the PAP

I don't understand the relationship of the migrating axis crossing the pin to spin line to revs. What I at least think I understand is that as the ball loses axis tilt and lane friction slows it down the revs increase because the track is rolling on almost its full circumference. Calculate the revs ...
by JohnP
April 27th, 2019, 7:37 pm
Forum: General Bowling
Topic: Marathon tournaments?
Replies: 3
Views: 371

Re: Marathon tournaments?

My partner and I won a 16 game doubles handicap tournament that started at midnight of New Years day in the late 60's at Woodleaf Lanes in Salisbury, N. C. There was a break after 8 games to get a bite to eat and re-oil the lanes. Prize money was $100 each, and as far as I know that's the only year ...
by JohnP
April 18th, 2019, 11:27 pm
Forum: The Pro Shop
Topic: How to deep clean my bowl
Replies: 5
Views: 888

Re: How to deep clean my bowl

The oven method is best as long as you have an oven that is specifically designed for bowling balls. A home oven's thermostat isn't accurate enough to assure you won't damage, even melt or burn a bowling ball. -- JohnP
by JohnP
April 17th, 2019, 4:27 pm
Forum: General Bowling
Topic: Thumb problems preventing clean release
Replies: 7
Views: 599

Re: Thumb problems preventing clean release

Things to check - span (too long?), bevel (not enough?), pitch (not enough reverse or too much forward), hole size (too big?). A complete refit with a certified fitter would be good. See Mo's fitting tips in the wiki (radio button at the top right hand side of every page here). -- JohnP