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General Category => Miscellaneous => Topic started by: makpa on January 01, 2009, 08:13:27 PM

Title: RPM
Post by: makpa on January 01, 2009, 08:13:27 PM
can anybody help me here. if i have 24 revs from release to i hit the pins, what is the rpm then?
Title: Re: RPM
Post by: taylorsproshop on January 02, 2009, 04:24:47 AM
Think it would also depend on how fast you ball speed is...
Obviously if you ball speed is faster your rev rate will be higher and if slower lower...
Title: Re: RPM
Post by: makpa on January 02, 2009, 04:43:44 AM
my speed is about 30 kmh 18-19 mph
Title: Re: RPM
Post by: LuckyLefty on January 02, 2009, 04:47:41 AM
You are in very good shape!  Now with all those awesome specs....just hit the pocket....they will ALL go boom!  Virtually every time!

REgards,

Luckylefty
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Title: Re: RPM
Post by: makpa on January 02, 2009, 04:51:13 AM
lol yeah i know. but stil dont use the terms rpm where im from. so it was more so i can relate to other people with about the same specs
Title: Re: RPM
Post by: LuckyLefty on January 02, 2009, 04:54:57 AM
high RPM
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Title: Re: RPM
Post by: makpa on January 02, 2009, 04:59:01 AM
yeah i gues so. but it would be more like 450 rpm right???

Edited on 1/2/2009 5:59 AM
Title: Re: RPM
Post by: dizzyfugu on January 02, 2009, 05:14:54 AM
Yup. A rough estimate/conversion from hand revs to RPMs is to multiply the hand revs by 19-20, which would mean something around 450 RPM for you - if the hand revs have been recorded correctly. Besides, it is just a ROUGH estimate with a lot of variance. Say 400+, that should fit, medium to high RPMs.
--------------------
DizzyFugu (http://"http://www.putfile.com/dizzyfugu/") - Reporting from Germany

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Edited on 1/2/2009 6:15 AM
Title: Re: RPM
Post by: LuckyLefty on January 02, 2009, 05:17:16 AM
Dizzy.....I'd like to be medium!  Your medium!

Walter Ray is medium in my mind compared to ALL bowlers!  Low for PBA players.

REgards,

Luckylefty
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Title: Re: RPM
Post by: makpa on January 02, 2009, 05:20:31 AM
i filmed it with a video camera several times and its constant arround 24 revs. så tha meens 450+-
Title: Re: RPM
Post by: makpa on January 02, 2009, 06:02:41 AM
650 rpm, thats a big diffrent from 450.
Title: Re: RPM
Post by: makpa on January 02, 2009, 06:18:42 AM
i know the hand revs is counted correctly. as it has been done several times with camera and it is consistent. it could also be that equation that is some what wrong. but i dont know that is why i asked in here
Title: Re: RPM
Post by: Burak Natal on January 02, 2009, 09:06:56 AM
makpa,
Search feature is very handy. You should try it from time to time
http://www.ballreviews.com/Forum/Replies.asp?TopicID=223237&ForumID=16&CategoryID=5


rockteschel,
As you know, with the friction and the axis migration, balls rev harder down the lane. That's why rev rate is usually measured with the only revs created till some point before the ball reaches backends. It can be first 10 frames, till arrows etc. Than it is multiplied by a factor to compute rpms or hand revs..

In any case, 24 hand revs is really huge, if you are not rolling with 6mph ofcourse
--------------------
Regards,
Natal
Title: Re: RPM
Post by: makpa on January 02, 2009, 01:31:26 PM
lol hehe. but still then i have to use a camera ONCE again hmm okay so there is no easy way to calculate it damn :S
Title: Re: RPM
Post by: the pooh on January 02, 2009, 06:53:27 PM
A way to get it close is to use the formula: revolutions/seconds =r/60. 18 mph equals 2.2 seconds from foul line to headpin(average speed).Using your counted revolutions of 24 down the entire lane ,the formula would yield 654 rpm!You are definitely high rpm!
--------------------
the pooh
Title: Re: RPM
Post by: J_w73 on January 02, 2009, 08:20:28 PM
You have to count the revs in the first 15 or 20 feet of the lane.. once the ball hits friction the revs are going to increase..
example .. a ball rolling at 18 mph and in a complete roll(no sliding or slippage) will be going around 704 rpm...
that is going to squew the real figure


here is a method to calculate it with camera..
I guess you can count the revolutions in the first 20 feet and then figure the rpms off of that..I would use a low flaring/low friction ball to get a true read of what you are actually putting on the ball


Calculate RPMs
Use a low flare bowling ball
Place a contrasting piece of tape from the PAP to above the fingers
Film (30 frames per second) your release from behind so that ball from your release to the arrows is clearly visible
Replay the recorded video back using frame by frame viewing
At the point of release, keep note of where the piece of tape points
Method 1
Advance the video frame by frame for 10 frames and keep track how many times the ball revolves
Enter your number of revolutions ( example 1.3, 2.5 )
Your RPMs =
Method 2
Advance the video frame by frame and count how many frames occur between 1 revolution
Enter your number of frames ( example 2.3, 3.5 )
Your RPMs =
Calculate Revolution Count
Using the same video from the RPM calculation...
Advance the video until the ball reaches the center arrow and count the number of times the tape revolves from the release point
Enter your number of revolutions ( example 2.3, 3.5 )
Your revolution count =
Slower Rev Rate = Stroker - up to 11 revolutions
Medium Rev Rate = Tweener - from 11 to 17 revolutions
Faster Rev Rate = Cranker - greater than 17 revolutions



--------------------
16-17 mph
350-475 rpm
PAP 5 1/2 x 3/8 up
High Game 300 x 3
High Series 782
Book Average 215 / 205
PBA Xperience ave 180
years bowling 22

Edited on 1/2/2009 9:22 PM
Title: Re: RPM
Post by: Burak Natal on January 03, 2009, 06:37:08 AM
Not to hijack the subject but
quote:

Faster Rev Rate = Cranker - greater than 17 revolutions

J_w73,
Cranking is one of the methods/techniques to create revs. You can stroke like Pete Weber or use two handed delivery like Osku, Belmonte, and can produce faster revs.

Therefore, Faster Rev Rate is not only equals to Cranker. It should be POWER PLAYER which stands for rev rate only, including any technique chosen.
--------------------
Regards,
Natal

Edited on 1/3/2009 10:20 AM
Title: Re: RPM
Post by: makpa on January 03, 2009, 07:44:06 AM
okay i will se if i can come up with some kind of result then. i will give it a shot.
Title: Re: RPM
Post by: LuckyLefty on January 03, 2009, 07:56:19 AM
Much ado about....relatively nothing.

Hit the pocket with revs above 450 you will WIPE them OUT!

Proceed to your nearest alley....destroy racks....return to ballreviews and brag about scores.

REgards,

Luckylefty
PS like a great putter...you've got the world on a string.
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..
Title: Re: RPM
Post by: thinkyoung on January 03, 2009, 08:27:10 AM
This site was listed yesterday for an axis tilt question.
It can solve your problem.

http://bowlspot.com/page/release

I have to give credit to "bluerrpilot" for the link.
Title: Re: RPM
Post by: J_w73 on January 03, 2009, 11:01:39 AM
quote:
Not to hijack the subject but
quote:

Faster Rev Rate = Cranker - greater than 17 revolutions

J_w73,
Cranking is one of the methods/techniques to create revs. You can stroke like Pete Weber or use two handed delivery like Osku, Belmonte, and can produce faster revs.

Therefore, Faster Rev Rate is not only equals to Cranker. It should be POWER PLAYER which stands for rev rate only, including any technique chosen.
--------------------
Regards,
Natal

Edited on 1/3/2009 10:20 AM


ok.. not my words.. just copied and pasted it from a webpage.. maybe I will just post the link next time to avoid confusion.

--------------------
16-17 mph
350-475 rpm
PAP 5 1/2 x 3/8 up
High Game 300 x 3
High Series 782
Book Average 215 / 205
PBA Xperience ave 180
years bowling 22
Title: Re: RPM
Post by: J_w73 on January 03, 2009, 11:11:34 AM
If you throw a ball with 0 revolutions to the dry backend of a lane and when it hits the dry it gets into a complete roll at 12 mph.. it will have 469 rpms...

--------------------
16-17 mph
350-475 rpm
PAP 5 1/2 x 3/8 up
High Game 300 x 3
High Series 782
Book Average 215 / 205
PBA Xperience ave 180
years bowling 22