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Stafford posted:

If it is - just bat speed - then it would make sense that the fastest players would have the greatest bat speed. Generally speaking, bats aren't that heavy in the grand scheme of things. Especially for grown men, who are great athletes. So the guys with the fastest running speeds are usually the guys with the most fast twitch fibers. The question is whether one athletic motion (running very fast ) is even related to another athletic motion (swinging the bat really fast).

this comment just doesn't pass the smell test. think of all the great hitters you have seen and tell me how bat speed relates to running speed. I will help, very little. some do both well some do one or the other. Recently off the top of my head Miggy, Pujols, Fielder, Ortiz, even Ryan Howard pre getting old, there can be a list as long as you want it to be of guys that don't run well but have great bat speed and power.

About 80% of the lefty 4,5 hitters over the last 100 hundred years would fit on the list.

Chris Dunn posted:
CaCO3Girl posted:

Since Physics was mentioned in the tittle....Force equals mass times acceleration. i.e. to hit the ball with the most force you have to account for mass AND acceleration. 

Yes, but it's the mass of the bat that you must account for, not the person.

Bingo... More to it than F=MA, you get into MOI and center of mass.  Mass of the bat follows the Force the player has created (strength, technique, athletic capability).

I just added this post to a different thread, but it seems to make more sense here.. Here is my observation based on our personal experience, which Im curious if others are seeing.  My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.  Again, SAME bat speed, but to complicate things more, his hand speed is averaging around 33-34mph where mine is around 30-31mph.  What gives??  Here is the difference, I'm 6'0, 200lb, and he is 5'7, 120lb (late bloomer as I was).  His mechanics are pretty sound as he works hard, so I have to take the sweet spot excuse out of the equation.  I doubt height comes into play because we are talking bat speed which is the same, but I absolutely think the player weight has to be a HUGE factor greatly increasing the MOI.  It seems projections from PG and PBR put a lot of weight on Exit Velocity, but it seems to me that more should be put on Bat Speed Vs Player size.  Thoughts???

Linedrive_07 posted:

My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.

I'm not a physicist, but I think there's a difference in the force that you each are exerting while the bat and ball are in contact. You are exerting more force than your son because you're stronger (I assume), not heavier. The mass of the bat is the same, and the velocity of the bat is the same, but you are overcoming the mass of the ball with more force than your son.

Last edited by MidAtlanticDad

Yes, I am stronger of course, but Force = M (Mass) X A (Acceleration) right?  I would think we are putting the same force on the bat since bat speed is the same.  He probably is accelerating the bat more because his hand speed is faster than mine.  At the moment of contact, it seems to me that the Moment of Inertia would be higher because of the weight holding the bat, similar to a larger bat vs. smaller bat generating more exit velo with the same bat speed.  Another note, his summer team uses a Hittrax system, and his exit velo is on average less and the peak velo is less than some of his teammates, but as an example he is quite a bit stronger than those same teammates (they workout together at team practices doing dumbbell press etc.)  They out-weigh him by 20lbs though, so just by that, I dont see the correlation.  The Hittrax doesnt get bat speed as far as I know, but his bat speed is visibly a lot quicker than those same teamates as well with the higher exit speed.  He is very strong for his size, which is why I think he has a descent bat speed.

Linedrive_07 posted:

Yes, I am stronger of course, but Force = M (Mass) X A (Acceleration) right?

Same disclaimer. You may be leaving out the "impulse" or the change in momentum, again when the bat is in contact with the ball. When your swing contacts the ball, you lose less momentum than junior because you're stronger, so you will accelerate the ball's flight more. May not help, but imagine holding the bat rigid while machine pitches 100 mph at it. The ball would rebound farther off of your bat than son's, because he couldn't hold the bat as rigid. I think that has more to do with strength than weight. Interesting problem.

I could see that being true if I was not seeing other examples of players significantly weaker, but weighing 20lbs more with less bat speed having higher exit velocities.  It just does not add up.  If you could show me an example of a player having a higher exit velocity of say 75mph that weighs 120lbs or less I would be more open to the strength difference, knowing my 2019 is not the strongest 120lb out there.... Must be a bbcore or wood bat.

Last edited by Linedrive_07
MidAtlanticDad posted:
Linedrive_07 posted:

My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.

I'm not a physicists, but I think there's a difference in the force that you each are exerting while the bat and ball are in contact. You are exerting more force than your son because you're stronger (I assume), not heavier. The mass of the bat is the same, and the velocity of the bat is the same, but you are overcoming the mass of the ball with more force than your son.

well Alan Nathan says that you can't exert force while the ball contacts the bat because contact is too short.

Dominik85 posted:
MidAtlanticDad posted:
Linedrive_07 posted:

My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.

I'm not a physicists, but I think there's a difference in the force that you each are exerting while the bat and ball are in contact. You are exerting more force than your son because you're stronger (I assume), not heavier. The mass of the bat is the same, and the velocity of the bat is the same, but you are overcoming the mass of the ball with more force than your son.

well Alan Nathan says that you can't exert force while the ball contacts the bat because contact is too short.

I didn't really want to get involved...  but you are correct dom.  By the time the vibrations or whatever travel sufficiently for the individuals mass to matter the ball is gone. It's ALL about the speed and characteristics of the bat - and of course angle of attack along with launch angle. 

2020dad posted:
Dominik85 posted:
MidAtlanticDad posted:
Linedrive_07 posted:

My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.

I'm not a physicists, but I think there's a difference in the force that you each are exerting while the bat and ball are in contact. You are exerting more force than your son because you're stronger (I assume), not heavier. The mass of the bat is the same, and the velocity of the bat is the same, but you are overcoming the mass of the ball with more force than your son.

well Alan Nathan says that you can't exert force while the ball contacts the bat because contact is too short.

I didn't really want to get involved...  but you are correct dom.  By the time the vibrations or whatever travel sufficiently for the individuals mass to matter the ball is gone. It's ALL about the speed and characteristics of the bat - and of course angle of attack along with launch angle. 

That sounds good and all, but it's just not what I'm seeing in the real world.  It would be good to see some others who have done some similar tests to compare.  Launch Angle nor sweet spot is the difference maker here.  Mass from my observation plays an overwhelming role as the exit velocities are nearly 20mph different.

Linedrive_07 posted:
2020dad posted:
Dominik85 posted:
MidAtlanticDad posted:
Linedrive_07 posted:

My son (2019 Grad) and I both swing his bat per the Zepp around 76mph, but there is a huge difference in our exit velo.  My exit velo tops at 90mph (Im 43 and hardly ever pick up a bat so my mechanics are horrible for those wondering about hitting the sweet spot).  A couple swings and I can hit 88mph no problem.  My son on the other hand is only hitting 73mph off the Tee.

I'm not a physicists, but I think there's a difference in the force that you each are exerting while the bat and ball are in contact. You are exerting more force than your son because you're stronger (I assume), not heavier. The mass of the bat is the same, and the velocity of the bat is the same, but you are overcoming the mass of the ball with more force than your son.

well Alan Nathan says that you can't exert force while the ball contacts the bat because contact is too short.

I didn't really want to get involved...  but you are correct dom.  By the time the vibrations or whatever travel sufficiently for the individuals mass to matter the ball is gone. It's ALL about the speed and characteristics of the bat - and of course angle of attack along with launch angle. 

That sounds good and all, but it's just not what I'm seeing in the real world.  It would be good to see some others who have done some similar tests to compare.  Launch Angle nor sweet spot is the difference maker here.  Mass from my observation plays an overwhelming role as the exit velocities are nearly 20mph different.

OK, I defer to Dr Nathan. LD, you seem to dismiss sweet spot based on mechanics. Why don't you set your son's iPhone video to 240 fps and verify that you're both contacting the barrel at the same spot.

One more note here, there is a lot of info out there suggesting that exit velocity off a Tee should be 10 to 15mph higher than bat speed.  I find this to be true even with my horrible swing.  The data is likely based mostly off players over 175lbs. When players weigh less like my son at 120lb, the trampoline effect just doesn't seem to come into play from the bbcore that we are swinging.

Atlantic, that would be nice to have, but too much work than Im willing to put in to capturing the sweet spot between the two of us.  I can tell you this.  I can walk up to the Tee cold and within 3 swings hit 88mph.  When I shank them, flare them, Im still hitting 79mph.  My son on the other works his butt off and when he really gets it crisp, it is 73mph (currently).  When he shanks the ball, he can be in the low 60s.  Under your theory, he should at least miss and hit one with my crappy mechanics and be in the 80s.  This has yet to happen, and really I dont think I have missed bad enough that I can remember being as low as his highest.  This is really why I dont think I need to put the effort into video taping exactly where he hits the sweet spot.  There has to be others out there that can confirm what Im seeing.

Loving science and physics as I do (a life long hobby),  this thread caught my eye, so I just now read through it.  It was interesting to me that what wasn't brought up until some time later in the thread and then seems to be ignored is what's involved in the acceleration factor.  

Take two players (with the same bat, same ball, and same ball speed, same angle of contact, same contact point on the bat) where one accelerates a bat early in the swing and reaches a particular maximum (let's say 90, or whatever) bat speed well before the contact point, maintaining that bat speed to point of contact; then compare that with the player who accelerates the bat to exactly the same speed at point of contact but continues acceleration past that point.  Is there going to be a difference in exit speed?  I say yes, because if you do the math taking into account deceleration the occurs at the point of contact (not to mention effect of the harmonics of a particular bat's material and density that's involved), the batter with less deceleration will produce more exit velocity than the other even though the bat speed at contact is the same.  The addition of more acceleration through the ball will produce more exit speed. But what I'm not sure about is just how much this affects exit speed.  I'm not very good at the math any more, but it'd be interesting to see it and quantify it.

So, yes . . . this would lend to how good timing benefits a power swing.  And the stronger a player is, they not only will tend to produce more bat speed, but also better acceleration and bat paths (e.g. "short swing") to get the maximum out of their kinetic chain.

Anyway . . . these are the thoughts running through my head as I read this thread.

Last edited by Truman

Truman, with our particular case, Junior's max hand speed is a little higher than mine, but peak bat speed is similar.  As with the sweet spot, I would say he has moved up in the stance and back enough that if there were a magic point at which he was accelerating the bat the most he would have hit that by now on accident.  My best guess is some how the acceleration vector is dramatically changed at contact between our 2 swings, which at this point I firmly believe it is due to mass.

 Thinking about the statements from those that believe Mass nor Force neither play a role at contact, because it is to quick, I say visualize this....  Drive in your car with a bat out the window, let go of it at 75mph, and as you let is go it happens to hit a ball on a Tee.  I contend NOWAY that ball would have the exit velo to go 300 feet, yet I assure you I can hit a ball that far with similar bat speed.

LINEDRIVE_07,

Often I'm not sure what one it talking about when they mention "Mass" (unless I happen to know they're a Physicist )  In physics it's known that as velocity increases Mass increases (e.g. E=MC²).  So, I agree the Mass is definitely a factor in the amount of Force that's applied and the energy that's transferred to the ball at contact.  But I don't see the Mass of the hitter (like over all body sizes) being directly part of the equation, except to the extent that the mass of the arms and hands can resist the deceleration I mentioned.  It's more that the strength of the more massive arms and hands, being more powerful, are able to resist deceleration on contact. 

It would be interesting for MythBusters to test your hypothesis and see how far they could make a ball fly driving a car as you suggest.       And also one might just attach a bat to a car, drive 75 mph and have the bat it the ball that's sitting on a tee as opposed to holding onto the bat in hand out the window and letting the drive by just hit the ball on the tee as one drive by.  I have a feeling one would get very different results in all three scenarios.  So, now in thinking about that, acceleration seems it may be a bigger factor than I was thinking???

Mass, as it's applied to the ball at point of contact, surely makes a difference.  Take a 34 in. skiinny broom stick (lower mass than bat) and a 34 in bat and hit a ball at the same bat speed.  I don't think there's any question which will hit the ball further.  Then, if one could, compare that 34 in bat with a chunk of wood (same wood as the bat) that 34inX34in and have that chunk of wood hit the ball at the same speed and see how much further (if at all) the ball might go.   At some point, there's an optimum Mass as a given speed to generate maximum distance/exit-speed.

 

Last edited by Truman

Truman,

I am sure the bat attached to the car would go a long ways.  Letting go of the bat so nothing is holding at contact I doubt would go very far.  Holding the bat, would be somewhere between.  So I think we both agree Mass is playing a role.  Obviously it is Force in the end F=MA which is exerted on the ball.  I think the A is changing at contact.  The tricky part for me is how much Force is being put on the bat prior to contact.  If I am only able to get the bat up to the same speed as Junior, are we putting the same Force on the bat?  It would seem so.  If that is the case, I still think due to my mass, more of that Force is transferred to the ball compared to Junior.  Trying to understand how Mass plays a role.  Lets say I stand up to two 6ft sections of a tree on the ground.  Assume they are both the same diameter, but one weighs twice as much because it is more dense.  Im pretty sure if I swung a bat the same speed, the lighter one would be easier to knock over.  It could be the same strength, meaning it wouldnt crack on contact, but because of the weight it is just easier to knock over.  Is this a good comparison?  I dont know.  I can only theorize based on my observations.  If you read all of the thread, you can see why I am hesitant to say it is due to Force as in I am stronger than Junior, because comparison to other teammates with considerable less strength.

I agree, you should call mythbusters

Explain this.  A bat hits a ball with no hands on the bat.  And it goes out of the park.

http://mlb.mlb.com/cutfour/art...?content_id=32446002

It is just physics, and the mass of the hitter connected to the bat has nothing to do with how far the ball goes.  Only the speed of the bat at impact.  Bigger players generally swing harder, but the bat doesn't know hands are on it when it impacts the ball.

Throw your Zepp thing in the lake.

Last edited by Go44dad
Linedrive_07 posted:

Truman,

I am sure the bat attached to the car would go a long ways.  Letting go of the bat so nothing is holding at contact I doubt would go very far.  Holding the bat, would be somewhere between.  So I think we both agree Mass is playing a role.  

Yes, I agree Mass plays a role.   I'm just not certain that we're referring to Mass in the same way.

 

 Obviously it is Force in the end F=MA which is exerted on the ball.  I think the A is changing at contact.  

 Yes, "A" for a human swing is changing and it will change at contact due to the transfer of energy from the ball to the bat.   Just how much change there might be will depend on how much force can be applied/maintained by the muscles from the hitter's body.

 

 The tricky part for me is how much Force is being put on the bat prior to contact.  If I am only able to get the bat up to the same speed as Junior, are we putting the same Force on the bat?  It would seem so.  If that is the case, I still think due to my mass, more of that Force is transferred to the ball compared to Junior.  

 The Mass that is in the bat is due to it's (what I will call) static mass + the mass added due to the velocity/acceleration of the bat, which will equal the force that can be applied to the ball.  The "static mass" of the hitter doesn't add anything to the mass of the bat.  Rotational vector forces are what adds a lot of Mass to a bat.

My son (a professional baseball player) and I are very close to having exactly the same Mass (he's an inch taller and has arms slightly longer than mine).  The big difference being, his Mass is more muscle than me.  And, he has much more flexibility than I, which leads to generating quite a bit more rotational force.  When he uses my driver at the golf course, he hits the ball around 365 yrds (and farther some times) and I'm lucky once and a while to hit mine 240 yds.  It's not just because he's stronger than me, but he generates more club-head speed due to his rotational ability and can accelerate to such speeds (he was actually clocked with a club-head speed as high a 185 mph with a driver).  So, given that our body masses are the same, it's not a factor in the difference in how much force is applied to our golf balls. 

 

 Trying to understand how Mass plays a role.  Lets say I stand up to two 6ft sections of a tree on the ground.  Assume they are both the same diameter, but one weighs twice as much because it is more dense.  Im pretty sure if I swung a bat the same speed, the lighter one would be easier to knock over.  It could be the same strength, meaning it wouldnt crack on contact, but because of the weight it is just easier to knock over.  Is this a good comparison?  I dont know.  I can only theorize based on my observations.  

 Hmmm???  Well, your'e right . . . the lighter tree would be easier to knock over, even given the same amount of force.  But that force to do so comes from the force of the bat (F= Mass of Bat x Acceleration of the Bat).  The Mass of what swings the bat is not a factor in the equation.  If the Acceleration vector is the same, we're going to get the same Force.  I don't know how one would apply a separate Mass to the Acceleration part of the equation.  I can see rotation vectors being a factor adding to Acceleration, but not some sort of static mass. 

 

 

If you read all of the thread, you can see why I am hesitant to say it is due to Force as in I am stronger than Junior, because comparison to other teammates with considerable less strength. 

 Maybe my example of my son and I might clear that up a little???  It's tough to get past the formula F=MA where A can have some various vector components. . . and especially when we look at A as being the same.  

 

 

I agree, you should call mythbusters

 I wish they still produced that program.  If they did, I would submit the hypothesis to them for their testing. 

 

I would think if your club speed was the same speed as your son, then we would be comparing apples to apples.  He is obviously applying more force to the club head which is why his ball travels so much further.  

Remember my son and I would have the same club speed in your scenario.  All this physics is making my head hurt.. Ha.  I took a couple courses back in College for my BSEE, but that was years ago

This paper does introduce body or muscle mass into the equation, but they only look at its impact on bat speed. This is the interesting part to me: "...work provided by the muscles is converted to kinetic energy that is shared between the bat and some fraction of the body mass of the batter, mainly the arms."

http://baseball.physics.illino.../BRJ-Steroids-v3.pdf

Go, the no-handed HR is easy to explain. The force exerted on the ball was enough to send it 350'. What I don't understand is, would the ball have left the bat at a higher velocity and travelled farther if the batter had kept both hands on the bat?

 Truman, I think the increasing mass idea is only applicable to velocities approaching the speed of light. Might only come into play for Stanton.

MidAtlanticDad posted:

This paper does introduce body or muscle mass into the equation, but they only look at its impact on bat speed. This is the interesting part to me: "...work provided by the muscles is converted to kinetic energy that is shared between the bat and some fraction of the body mass of the batter, mainly the arms."

 

I tend to agree.

 

 

Go, the no-handed HR is easy to explain. The force exerted on the ball was enough to send it 350'. What I don't understand is, would the ball have left the bat at a higher velocity and travelled farther if the batter had kept both hands on the bat?

 A few unknown variable there.  I would think the answer is, probably yes. 

 

 

 Truman, I think the increasing mass idea is only applicable to velocities approaching the speed of light. Might only come into play for Stanton.

 It's applicable for all velocities.  The question really is, just how much at these velocities? 

 

Atlantic, that is a cool article, thanks for sharing.  Im sure we all know what it is like to hit a ball on the sweet spot of the bat where the Max force is applied to the ball.  Great feeling actually, but it is hard to describe.  Its like a quick force shock.  That feeling is what tells me that the bat alone if let go would not have the same force potential on the ball compared to me holding it..   I can feel that force transfer although is really hard to explain.  That is when our Mass (I believe is combined with the Force already in the bat at impact.  Now if you had a bat twice as heavy and everything being equal, Im sure we can agree that the exit velocity is going to be greater.  By how much, we would have to ask Truman, Ha.  But to take this a step further, If you think about it, there is a center of gravity or a Fulcrum that the bat is traveling around and I tend to believe the weight/(total mass including bat and player) that is on the outside of the center of gravity that is rotating is contributing to the Force transferred to the ball.  I dont know what the percentage of it is from the player, but just going back to what Im seeing in the real world, this is the only thing that makes sense to me.  

Ok I guess I am in. First full disclosure. I am 6'4" and big and so is my 2020. So yes this is one of my pet peeves. People sell bigger kids short all the time and want to explain everything away with 'he's just big'. He 'muscles' the ball while others craftily hit the gaps with their lightning quickness. Here is the reality. Weight is relative to what you are trying to do with it. 2lbs isn't much...  or is it?  What if you tied a bat by a string around your tongue!!!  Bet that 2lbs would feel pretty heavy lol. Ok tht was kind of gross. Point is that two pound bat gets pretty heavy when you are trying to get the barrel to travel 90mph. It takes a lot of strength to do that. And sometimes big guys look effortless doing it. While the little guy looks like he is putting every ounce of energy he has into it thus creating the illusion he is moving quicker. The fact of the matter is the stronger kid is simply moving his hands and the bat faster. Yes it flys in the face of what people want to believe but the faster bat is from the stronger player. And by the way with all the modern fitness info and travel teams etc these big kids aren't stiffs anymore. And the good big athlete beats the good little athlete 100 times out of 100. Now before getting skewered I do have to add that hitting is about strength not height. Obviously the 6'4" kid has it easier than the 5'9" kid. However if that 5'9" kid really wants to dedicate himself to the weight room he too will generate massive bat speed. But it is (ignoring squaring it up) ALL about bat speed and mass. It has nothing to do with mass of the player. This was a hard one for me to accept as well frankly. It just seems intuitive. But I am not going to argue physics with Dr Nathan. And I am highly critical of the old tobacco spitting clan who brush off science and technology in baseball. We can't change the laws of physics cause we struggle to believe or understand it. 

Last edited by 2020dad

2020, you are missing the point , I am the bigger guy in this case and I can hit it farther.  No argument there.  My problem is, our bat speed is the same, so I'm just trying to logically figure that out, and bounce ideas off others that are interested.

GO, your world may be flat, if you don't enjoy the discussion, go pout somewhere else about it.

 

 

Linedrive_07 posted:

2020, you are missing the point , I am the bigger guy in this case and I can hit it farther.  No argument there.  My problem is, our bat speed is the same, so I'm just trying to logically figure that out, and bounce ideas off others that are interested.

GO, your world may be flat, if you don't enjoy the discussion, go pout somewhere else about it.

 

 

No actually I am not missing the point. Perhaps your zepp has some issues I don't know. Our zepp seems to work well. But (and I am not going to go back and read everything but I am assuming you are using the same bat) something is amiss in your measurements. If your bat is the same, bat speed is the same then the only way exit velocity could differ is contacting the ball in a different spot on the bat. The individuals mass has NOTHING to do with it. I suggest you look up Dr Alan Nathan and do some reading regarding the 'node' of the bat (sweet spot). If the ball is struck two inches one way or the other it can make a big difference. The ball will appear the same off the bat - same trajectory etc - but be hit harder or softer. There are a lot of factors to exit velocity - which is why it is preferred to bat speed. To get a high exit velocity you need to do the following:  have bat mass, bat speed, good attack angle, good launch angle and hit the ball as close to the node as possible. Mix up a few of those and you could have two people swinging the bat the same speed with grossly different exit velocities.  But it will have nothing to do with the mass of the individual - that is what Godad is trying to say. 

Adding to my thoughts on the center of gravity, there is a mass rotating around that fulcrum/axis or whatever you want to call it.  As far as the ball is concerned, it would have no idea where the bat stopped and where your body began.  It would just see the total force transferred at a very small location on the bat.  Truman, does this change the idea of how you would look at it in relation to physics?  Take it a step further, let go of the bat right before contact.  The total mass is reduced.  Is it possible to hit a homerun?  Yes, depends on bat speed and size of bat.  Now let's say magically half of the bat broke free right before contact.  Would that reduce the exit velocity even more?  Logically to me yes.  If you are following my train of thought, this should continue to add all the way back to the center of the axis the bat is rotating around.  I'm am not one to just assume something is the way it is just because someone in the past performed their own experiment and said it was so.  It has to add up to me period.  Truman, I would love to hear your thoughts.

Linedrive_07 posted:

2020, you are missing the point , I am the bigger guy in this case and I can hit it farther.  No argument there.  My problem is, our bat speed is the same, so I'm just trying to logically figure that out, and bounce ideas off others that are interested.

GO, your world may be flat, if you don't enjoy the discussion, go pout somewhere else about it.

 

 

I very much enjoy the discussion!  And welcome to the site!

According to the numbers posted on Perfect Game website of players who have had Zepp and Exit velocity recorded, there definitely seems to be a correlation to size in regard to exit speed.  But size does not seem to correlate to a higher bat speed, as measured by Zepp.  So, many of the theories and physics of this phenomenon do not seem to hold water.  I am the Original Poster and I still contend that a smaller player with unusually high bat speed has more upside potential for dramatically increasing his exit velocity as he gains mass, for reasons still unknown.  

By the way, the smaller boy has had several Zepp readings over 104 mph and has peaked at 109.  His highest exit velocity is 89 mph.  They are both still using a 32 inch BBCOR ( perfect game uses for high school player ) and they are each calibrated before swinging.  I'm still confused on why we are impressed by a 200 lb player with a 90+ exit speed ( at any age ).  Seems fairly normal according to all of the documented showcase results. 

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