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Thread: another tech ball to put on our Christmas list ?

  1. #21
    I eat, sleep and breathe softball FiveFrameSwing's Avatar
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    My understanding of the RevFire is that it doesn't actually measure the 'velocity' of the pitched ball, but instead measures the 'time' of flight. It assumes a particular 'distance' and then computes 'velocity' as 'distance/time'.

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  3. #22
    Checking out the clubhouse mistaleft's Avatar
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    I would love to get my hands on a RevFire just to compare it to my PitchTrackers. The only way we've been able to get readings on the PT is to eliminate the backswing, which I'm afraid may cause timing issues when pitching live. Would like to see if the RevFire 2 can register readings with out altering mechanics.

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    Softball Junkie BT3100's Avatar
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    Quote Originally Posted by FiveFrameSwing View Post
    You will find that a radar gun will give a different value for pitch speed.
    At Coastal 4 weeks ago 61.2 on Rapsodo. I catch for her and did when she couldn't break a pane of glass
    Also use the packet radar on her once a week. Speed is between 58-62. Now I can track spins which is what she needs help with.
    A change up should be kept low so that if the hitter does time it, they have to make the secondary adjustment of going down to hit the ball also. 2 movements in the hitter doubles their chance of a bad swing. The combo of being able to read the pitcher's change up early and doing a backflip to keep it up in the zone is a deadly combo. - Bill Hillhouse

  5. #24
    I eat, sleep and breathe softball FiveFrameSwing's Avatar
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    Quote Originally Posted by BT3100 View Post
    At Coastal 4 weeks ago 61.2 on Rapsodo. I catch for her and did when she couldn't break a pane of glass
    Also use the packet radar on her once a week. Speed is between 58-62. Now I can track spins which is what she needs help with.
    I believe you.

    Your RevFire looks to be factoring in a distance of 36.8ft. If I assume that your daughter strides out 5ft prior to the release, and that the catcher puts out their mitt to catch the ball at approximately the back edge of home plate, then the 61mph reading would be more like 62.9mph.

    The 'velocity' readings on the RevFire turn out to be a function of pitching distance. What it really measures is 'time'.

    To be honest ... 'time' IMO is more important than is 'velocity'. If Pitcher-A strides a foot further than Pitcher-B, and throws at the same velocity, then the RevFire will give a higher number to Pitcher-A. A radar gun would give both pitchers the same 'velocity' reading. However, Pitcher-A is giving batters less reaction 'time' ... and it is 'time' that the RevFire actually is measuring.

    It is possible for two pitchers to compete while being measured with both a RevFire and radar gun ... and for a RevFire to suggest one throws at a higher velocity, and for a radar gun to suggest that other pitcher throws at a higher velocity. The radar gun is correct in terms of differentiating which pitcher actually threw at the higher 'velocity' ... but the RevFire number better represents the reaction 'time' given to the batter.
    Last edited by FiveFrameSwing; 01-07-2019 at 09:21 PM. Reason: corrected units

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  7. #25
    Softball Junkie BT3100's Avatar
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    Quote Originally Posted by FiveFrameSwing View Post
    I believe you.

    Your RevFire looks to be factoring in a distance of 36.8ft. If I assume that your daughter strides out 5ft prior to the release, and that the catcher puts out their mitt to catch the ball at approximately the back edge of home plate, then the 61mph reading would be more like 62.9ft.

    The 'velocity' readings on the RevFire turn out to be a function of pitching distance. What it really measures is 'time'.

    To be honest ... 'time' IMO is more important than is 'velocity'. If Pitcher-A strides a foot further than Pitcher-B, and throws at the same velocity, then the RevFire will give a higher number to Pitcher-A. A radar gun would give both pitchers the same 'velocity' reading. However, Pitcher-A is giving batters less reaction 'time' ... and it is 'time' that the RevFire actually is measuring.

    It is possible for two pitchers to compete while being measured with both a RevFire and radar gun ... and for a RevFire to suggest one throws at a higher velocity, and for a radar gun to suggest that other pitcher throws at a higher velocity. The radar gun is correct in terms of differentiating which pitcher actually threw at the higher 'velocity' ... but the RevFire number better represents the reaction 'time' given to the batter.
    That makes perfect sense!!
    A change up should be kept low so that if the hitter does time it, they have to make the secondary adjustment of going down to hit the ball also. 2 movements in the hitter doubles their chance of a bad swing. The combo of being able to read the pitcher's change up early and doing a backflip to keep it up in the zone is a deadly combo. - Bill Hillhouse

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  9. #26
    I eat, sleep and breathe softball coach james's Avatar
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    It would appear that FFS is actually a math genius.... who knew?
    Last edited by coach james; 01-08-2019 at 04:19 PM.
    "The only difference between average and exceptional, is the attention to detail applied to the task... Don't practice mistakes." James Clark

  10. #27
    Began this habit in 1980 JohnnyO's Avatar
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    Rev fire 2 is back in stock to order

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