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Author Topic: question about rev rates...  (Read 1103 times)

stopncrank

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question about rev rates...
« on: April 09, 2009, 05:36:12 AM »
so im working with my coach the other day and we measure my pap to see if its changed any and it hasnt, so then he measured and said that i get 19-20 revs on the ball, at 17.5 to 18 mph ball speed. so my question is how do i convert that to rpms? last time i had it checked, another guy said i was about 450-475 rpms, but wasn't exactly sure. so do any of you guys know where i would fall based on the info im given? thanx, stopncrank
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bltbyj

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Re: question about rev rates...
« Reply #1 on: April 09, 2009, 02:12:12 PM »
I can't remember the site off hand but I'll get you the link later tonight.
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JohnP

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Re: question about rev rates...
« Reply #2 on: April 09, 2009, 04:54:42 PM »
Check the Unofficial FAQ sticky post at the top of this forum.  --  JohnP
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Uncle Crusty

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Re: question about rev rates...
« Reply #3 on: April 09, 2009, 05:01:28 PM »
Let's say the numbers are 19.5 revolutions and 17.75 MPH.

Time To The Pins:

(60 feet to pins/5280 feet per mile)/(17.75 MPH/3600 seconds per minute) = 2.305 seconds

Revs Per Second:

19.5 revolutions/2.305 seconds = 8.46 RPS

Revs Per Minute:

8.46 RPS x 60 seconds/minute = 508 RPM

It's that easy. The official conversion would be 1.46667 x speed (in MPH) x number of revolutions.
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"Nobody in the game of football should be called a genius. A genius is somebody like Norman Einstein."

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Edited on 4/9/2009 5:02 PM

Edited on 4/9/2009 5:03 PM
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another300

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Re: question about rev rates...
« Reply #4 on: April 09, 2009, 05:04:48 PM »
quote:
Let's say the numbers are 19.5 revolutions and 17.75 MPH.

Time To The Pins:

(60 feet/5280 feet)/(17.75 MPH/3600 seconds per minute) = 2.305 seconds

Revs Per Second:

19.5 revolutions/2.305 seconds = 8.46 RPS

Revs Per Minute:

8.46 RPS x 60 seconds/minute = 508 RPM

It's that easy. The official conversion would be 1.46667 x speed (in MPH) x rev rate (in RPM).

 


Uncle Crusty you've probably forgotten more math than i ever learned. lol
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bltbyj

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Re: question about rev rates...
« Reply #5 on: April 09, 2009, 07:38:47 PM »
Here is the link for your rev rate.

http://bowlspot.com/page/rpms
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