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Thread: Revfire2 stats

  1. #41
    Finding my way 4 girl's dad's Avatar
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    Quote Originally Posted by RevFire Corp. View Post
    Some RevFire 2 Design Stats...

    The RevFire 2 speed measurement is designed to match a high-powered Stalker radar gun set to Peak Detect Mode (release speed). Thousands of measurements were made to map the time-of-flight measured by the RevFire ball to the Stalker reading for the same pitch. The time-of-flight to peak release speed mapping is accurate (within about 1 MPH) provided that the ball is caught at the correct distance. For correct distance, the catcher should plant his/her feet 3’ behind home plate. Check the distance from rubber to pointed tip of home plate. It should be exactly 43’ if the app is set to the 43’ setting. Sometimes these distances or the app setting is off. Also, if the ball is caught 1 foot closer to the pitcher than normal, the speed will be about 1 MPH faster. If ball is caught 1 foot further from pitcher, the speed will be about 1 MPH slower.

    There is another factor that can affect the RevFire 2 speed determination – the stride length of the pitcher. For instance, two pitchers can measure consistently at 55 MPH using a Stalker radar gun; however, using RevFire one pitcher is consistently at 57 MPH and the other at 53 MPH. The coach should know that the pitcher that reads higher on the RevFire is releasing closer to the plate than average, while the one that reads less than 55 is releasing further from the plate than average. This difference may be due to stature, mechanics, or both. This is information not available from a radar gun but is important since a key metric is the time that a batter has to react to a pitch. By measuring the time-of-flight the RevFire provides the apparent speed to the batter - reaction time is what matters.

    Be aware that some lower powered radar guns may pick up the speed at varying points along the flight of the ball. A 60 MPH release can be read as 54 MPH if picked up at plate crossing.


    The RevFire 2 spin measurement is accurate to within 0.35 RPS. There are several internal checks made for spin calculation and if the spin cannot be accurately calculated with high confidence due to weak or inconsistent signals it will display “0 RPS”. “0 RPS” may also display for good knuckleballs. RevFire balls should not be used in a pitching machine. Pitching machine spin rates and electric motor magnetic fields can exceed RevFire ball capabilities.
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  2. #42
    Checking out the clubhouse sbpitcher19's Avatar
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    Quote Originally Posted by RevFire Corp. View Post
    Some RevFire 2 Design Stats...

    The RevFire 2 speed measurement is designed to match a high-powered Stalker radar gun set to Peak Detect Mode (release speed). Thousands of measurements were made to map the time-of-flight measured by the RevFire ball to the Stalker reading for the same pitch. The time-of-flight to peak release speed mapping is accurate (within about 1 MPH) provided that the ball is caught at the correct distance. For correct distance, the catcher should plant his/her feet 3’ behind home plate. Check the distance from rubber to pointed tip of home plate. It should be exactly 43’ if the app is set to the 43’ setting. Sometimes these distances or the app setting is off. Also, if the ball is caught 1 foot closer to the pitcher than normal, the speed will be about 1 MPH faster. If ball is caught 1 foot further from pitcher, the speed will be about 1 MPH slower.

    There is another factor that can affect the RevFire 2 speed determination – the stride length of the pitcher. For instance, two pitchers can measure consistently at 55 MPH using a Stalker radar gun; however, using RevFire one pitcher is consistently at 57 MPH and the other at 53 MPH. The coach should know that the pitcher that reads higher on the RevFire is releasing closer to the plate than average, while the one that reads less than 55 is releasing further from the plate than average. This difference may be due to stature, mechanics, or both. This is information not available from a radar gun but is important since a key metric is the time that a batter has to react to a pitch. By measuring the time-of-flight the RevFire provides the apparent speed to the batter - reaction time is what matters.

    Be aware that some lower powered radar guns may pick up the speed at varying points along the flight of the ball. A 60 MPH release can be read as 54 MPH if picked up at plate crossing.


    The RevFire 2 spin measurement is accurate to within 0.35 RPS. There are several internal checks made for spin calculation and if the spin cannot be accurately calculated with high confidence due to weak or inconsistent signals it will display “0 RPS”. “0 RPS” may also display for good knuckleballs. RevFire balls should not be used in a pitching machine. Pitching machine spin rates and electric motor magnetic fields can exceed RevFire ball capabilities.
    The bit about stride length is good information to know. Thank you. I have yet to get a 0 reading, but it will occasionally read a pitch with very little spin and very high velocity (7.3/68 mph for example). It doesn't happen too often, but enough to notice. It usually reads the next pitch fine. Overall, I've enjoyed using the product so far. If the app would display a history of pitches, it'd be even better. Thanks for posting the info.

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    4 girl's dad (10-03-2018), Ken B (10-06-2018)

  4. #43
    I can talk softball all day Fastpitch_Dad's Avatar
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    DD threw 130 pitches with it last night and it was consistent with just a few outliers.

    1x it read 0 rps and 77mph on a pitch
    1x it read my toss back even with catcher set to 38mph and had a crazy high rps number.
    3-4x there was no measurement.

    If nothing else it was good comic relief.

    BTW- we used the voice recall directly on the phone and we love it. Our method was to use the voice for rps and glance at the screen if you want to know mph.


    Sent from my iPhone using Tapatalk

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  6. #44
    I'm a fan Jday's Avatar
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    Measured distance better got much better readings. Thanks


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  7. #45
    I'm a fan Djubs's Avatar
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    Quote Originally Posted by Djubs View Post
    We got our RevFire 2 last week and went to an indoor facility to test it out. The numbers were all over the place. It did register most throws, but still missed a few here and there. The spin rates was all over the place. I had DD just throw a regular fastball several times from the same distance every pitch and she either throws with different spins every pitch or this thing is possessed. The numbers weren't even close. We were getting everything from 4.3rps to 19.6 rps. To my naked eye the pitches looked fairly identical. We tried the drop ball, drop curve, and riseball. Every pitch was drastically different according to the revfire2. It's been sitting in the pitching bag since that night. We are going to break it out again tonight and retest. If you guys can think of anything different we can try or test, please let me know.

    I opened the revfire and spun it in the air a couple times and I seen some numbers appear on the app. Then I measured exactly 46 ft (43 for the pitching distance) then measure off another 3 Ft behind the plate. I made sure to catch the ball right over the 46' marker. The speeds seem to be pretty close to what she normally throws (51-54mph) so I believe we were at the correct distance.
    So we went to the park the other night and we got much better results. Her spins were all equaling within 2-3 RPS of each other. Dropball was very consistent at about 16rps which makes sense because that is her most consistent with speed and location. The rise ball was not consistent but I firmly believe that is DD and not the revfire.

    I'm now interested to see what happens when we go back to the indoor facility to pitch. If the numbers are crazy like the first time we tested it, could it be from some interference? Where we pitch there is 6 automatic pitching machines lined up right along side our pitching lane. I'm wondering if something in them pitching machines are messing with the readings. Also, I read where the revfire can pick up different balls. I'm now wondering if someone else in the area was using one and I was picking up theirs instead of mine. I'll also check that list next time to make sure only my revfire is being picked up.

  8. #46
    Checking out the clubhouse Abouche's Avatar
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    Does anyone have their Customer Service number? One of our balls won't read. I have tried all the suggested tricks on 3 separate occasions and it's dead. The other ball works fine. I have emailed them, but I would like to call.

  9. #47
    I eat, sleep and breathe softball coach james's Avatar
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    Quote Originally Posted by Abouche View Post
    Does anyone have their Customer Service number? One of our balls won't read. I have tried all the suggested tricks on 3 separate occasions and it's dead. The other ball works fine. I have emailed them, but I would like to call.
    The email address is all thats provided... I have Daves cell number, but he wont return calls or texts.
    They agreed to send me a replacement ball after I send back the defective ball first.
    "The only difference between average and exceptional, is the attention to detail applied to the task... Don't practice mistakes." James Clark

  10. #48
    I can talk softball all day coachbubbles's Avatar
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    Stats....dead.....as some have reported. Canít even get it to register a pitch. Tried on multiple Apple devices. Emailed for a replacement. Severely disappointed this many people are reporting defective products and no customer service phone number.

  11. #49
    I eat, sleep and breathe softball coach james's Avatar
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    New replacement ball arrived Sat. Fingers crossed that the 2 I have now will work!!
    "The only difference between average and exceptional, is the attention to detail applied to the task... Don't practice mistakes." James Clark

  12. #50
    Checking out the clubhouse CalRays.org's Avatar
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    I believe the rise should have significantly more spin than fastball and drop.

    Quote Originally Posted by sluggers View Post
    With due respect, your Dd does not throw a drop, a rise, curve and a screw. I doubt she even throws a riseball.

    All of the pitches are the same speed and have the same RPS. It is possibile that the axis of rotation are different, but I'll bet $5.00 that they all rotate in the same direction.

    I've posted this many times in the past, and I'll keep saying it:

    Pick *ONE* breaking pitch, either a riseball or a dropball, and perfect that pitch.

    She is wasting time trying to learn all those pitches.

    My poor DD#1, a D1 all-conference, pitcher has a drop and a fastball.

    The only pitcher that I've seen with several pitches is Cat Osterman...and I doubt at 12YOA, your DD is Cat Osterman.

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