Is there a way to figure out your rpm's out?  I was told a while back that you could take your speed(mph? or seconds?) and the number of turns and figure it out.  I was never told how to come to the rpm part of it though???  

We had debate last night about another bowler and myself having a high rpm level and I personally don't think I'm as high as other people think I am.  So now I am very curious how to figure this out.

Thanks

CALCULATION OF REV RATE
From Brian Pursel: Product Manager, Ebonite
RPM's, or revolutions applied, is the speed of the revolutions. The faster the revs, the greater the turning force is at the breakpoint. To measure RPM's you will need a low flare ball (spare ball is good), a piece of tape (4 to 6 inches long), and a video camera. Place the piece of tape running from the bowler's PAP to above the fingers. Film from behind, with a close up of the hand at the release point. As the ball is being released, stop the tape. Assign the tape a position on a clock (i.e. the piece of tape points to 10:00). In slow motion, click off 10 frames and freeze. Count the amount that the tape rotates as hours, as if it was the hour hand on a clock. Multiply the amount of hours by 15. (For example, the ball started at 10:00. After 10 slow motion frames the tape ended at 5:00, passing 10:00 once). One complete rotation around (10:00 to 10:00) counts as 12 hours. 10:00 to 5:00 (the ending position) equals 7 hours. This is a total of 17 hours of rotation. Multiply the amount of hours (17) by 15. This equals 255 Rpm's. The other way to measure revolutions is called hand revs. You will also need the piece of tape and a video camera for this. Repeat the steps for measuring RPM's, however let the ball travel 15 feet down the lane. This is the distance of the fourth arrow. Note the starting position of the tape and count the amount of times the ball has rotated using fractions, not hours. Take the total amount of rotations and multiply by 4. This equals hand revs. For example, the ball started at 9:00 and ended at 3:00, passing past 9:00 three times. This would result in 3 1/2 rotations. 3 1/2 X 4 = 14 hand revs. Why do we not count the total amount of revs the ball rotates all the way down the lane until it hits the pins? Because friction will slow down the ball speed and create additional revolutions. By using the first 15 feet, we are counting the rotations in the presence of lane oil, a very low friction environment. In our Surface Friction Selection Chart, we use hand revs rather than RPM's.
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Aloarjr810
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Click For My Grip

Thank to all that replied.  

I had the tape and the high speed video and just didn't have the right numbers to plug in.  We did 2 game with both methods and came up with the same number give or take very little variances.  Apparently I do have more rpm than I thought(370ish).