MOI or moment of inertia

[garyt]

Does anyone know what the MOI rating on the 2012 Easton bats would be? Specifically comparing the Easton Stealth and Synergy 32/22.

My daughter is right at the point where I can't tell if a 22 ounce bat is too big or should be just right. I thought by knowing the MOI might help me in choosing a bat for her.

She is 14, 5 foot 3, 115 pounds.

Thanks in advance for the help.

 

[softballphreak]

My swag is that a 32/22 would be just fine; although I would take a hard look at a 32/22 Xeno.

As far as the MOI, maybe this site can help: List of moments of inertia - Wikipedia, the free encyclopedia

 

[straightleg]

I would think a 32/22 would be fine for a girl her size. My daughter's senior year she swung a blue / white synergy
It felt alittle bit end loaded compared to the demarini she had before.
She hit a bunch of good ones with it.


Straightleg

 

[fastpitch91]

I am not sure anyone actually calculates an actual moi. i have swung a lot of stealths and synergies and the synergy ( but to be honest not the 2012's) but every year from 2006 forward even in same weight(drop) has a higher MOI. If you are unsure she can handle the heavier feel at her age and size go with stealth it is more balanced but also more bucks.....

 

[nanotech14]

My dd is 14 and is swing a 32/22 cf5 insane endloaded,she loves it last year she had a 31/21 stealth.She loved that bat,until she got her insane and she doesn't even look at her stealth,also has a 32/22 nanotek,she still graps that once in awhile.Your dd IMO can handle a 32/22 too,just have to find what she likes the best.Xeno is awsome too.

 

[SBFAMILY]

Physicists have shown,[3,4] from a simple collision analysis, that the optimum bat weight is between 15 and 18oz
This aricle covers bat speed and weight of bats plus points out the study on heavy bats.

Bat Weight, Swing Speed and Ball Velocity

 

[softballphreak]

Physicists have shown,[3,4] from a simple collision analysis, that the optimum bat weight is between 15 and 18oz
This aricle covers bat speed and weight of bats plus points out the study on heavy bats.

Bat Weight, Swing Speed and Ball Velocity

So a 5'3" player should be swinging a 29 oz bat? (63"/7 + 20)

 

[FiveFrameSwing]

Physicists have shown,[3,4] from a simple collision analysis, that the optimum bat weight is between 15 and 18oz
This aricle covers bat speed and weight of bats plus points out the study on heavy bats.

Bat Weight, Swing Speed and Ball Velocity

The comment you highlighted was originally from another article that this author was attempting to add clarity on.

Take note that the author made a simplifying assumption and ignored the force by the player on the bat … an interesting topic in itself.

One could read an article like this and draw the conclusion that a youth hitter should be training with an ultra-light bat during their off-season training program … and if that is the conclusion reached, then it is questionable just how helpful such an article is.

IMO one of the biggest contributors to poor swing mechanics has to do with over reliance of ultra-light bats.

Get in the cages with the machine cranked up to the point where you are just able to deal with hitting the ball with an ultra-light bat. Enjoy yourself for a short bit as you make a healthy number of cuts.

Next … while keeping the pitching machine at the same speed … and while keeping your distance from the pitching machine the same … select a heavier bat. Again, take a healthy number of cuts … with the heavier bat.

What do you observe while taking cuts with the heavier bat?

One of the first things people observe is that they feel “rushed”.

So how does one deal with that? One effective way to deal with that is by loading “earlier and slower”. A valuable lesson … a lesson that many are forced to learn if their ultra-light bat is discarded. A very valuable lesson indeed.

But wait … there is more.

The article mentioned an alarming difference between the 10yr LL player and MLB player in terms of optimal bat weight. Notice that the author didn’t speculate about strength, but instead speculated that it had something to do with the MLB players having more control. It turns out that the mechanics of an MLB hitter are vastly different than that of the majority of 10yo LL hitters … and the truth be known, the heavier bats do punish inferior mechanics, while rewarding better mechanics. A 10yo swinging an ultra-light bat can easily resort to powering their swing with their arms & shoulders … whereas the pro, even despite their increased strength, taps into a different mechanism for force generation … which is basically why they have advanced to the pro level after all.

So, other than a ‘feel’ of being ‘rushed’, what else did you ‘feel’ during the switch to a heavier barrel?

If you are an “arm/shoulder powered swinger” and/or someone that swings with a poor swing sequence, then swinging a heavy barrel at relatively high pitch speeds is likely to have you feeling a bit ‘foolish’ … basically a feel of being awkward … and there is an important message there if you listen to it. That ‘feel’ is telling you something quite important. It’s telling you that you are doing something that isn’t quite right. One answer to avoid that feel is to switch back to an ultra-light bat … but there is another way.

Imagine if you had a hitting instructor that could teach the use of mechanics for swinging a heavier barrel … while at the same time the kid only had a heavier barrel available to them to swing … … … you end up with a powerful combination … ‘desire’ + ‘knowledge’ … you have a hitter wishing to hit the ball and someone nearby to assist with that happening.

The smiles you see are genuine when a kid learns that they can swing a heavier bat than what they are used to swinging, at speeds that they couldn’t deal with before, and with improved mechanics that have them powering out linedrives.

 

[Greenmonsters]

I have no hidden agenda, but I'd really like to see video of this.

 

[straightleg]

The comment you highlighted was originally from another article that this author was attempting to add clarity on.

Take note that the author made a simplifying assumption and ignored the force by the player on the bat … an interesting topic in itself.

One could read an article like this and draw the conclusion that a youth hitter should be training with an ultra-light bat during their off-season training program … and if that is the conclusion reached, then it is questionable just how helpful such an article is.

IMO one of the biggest contributors to poor swing mechanics has to do with over reliance of ultra-light bats.

Get in the cages with the machine cranked up to the point where you are just able to deal with hitting the ball with an ultra-light bat. Enjoy yourself for a short bit as you make a healthy number of cuts.

Next … while keeping the pitching machine at the same speed … and while keeping your distance from the pitching machine the same … select a heavier bat. Again, take a healthy number of cuts … with the heavier bat.

What do you observe while taking cuts with the heavier bat?

One of the first things people observe is that they feel “rushed”.

So how does one deal with that? One effective way to deal with that is by loading “earlier and slower”. A valuable lesson … a lesson that many are forced to learn if their ultra-light bat is discarded. A very valuable lesson indeed.

But wait … there is more.

The article mentioned an alarming difference between the 10yr LL player and MLB player in terms of optimal bat weight. Notice that the author didn’t speculate about strength, but instead speculated that it had something to do with the MLB players having more control. It turns out that the mechanics of an MLB hitter are vastly different than that of the majority of 10yo LL hitters … and the truth be known, the heavier bats do punish inferior mechanics, while rewarding better mechanics. A 10yo swinging an ultra-light bat can easily resort to powering their swing with their arms & shoulders … whereas the pro, even despite their increased strength, taps into a different mechanism for force generation … which is basically why they have advanced to the pro level after all.

So, other than a ‘feel’ of being ‘rushed’, what else did you ‘feel’ during the switch to a heavier barrel?

If you are an “arm/shoulder powered swinger” and/or someone that swings with a poor swing sequence, then swinging a heavy barrel at relatively high pitch speeds is likely to have you feeling a bit ‘foolish’ … basically a feel of being awkward … and there is an important message there if you listen to it. That ‘feel’ is telling you something quite important. It’s telling you that you are doing something that isn’t quite right. One answer to avoid that feel is to switch back to an ultra-light bat … but there is another way.

Imagine if you had a hitting instructor that could teach the use of mechanics for swinging a heavier barrel … while at the same time the kid only had a heavier barrel available to them to swing … … … you end up with a powerful combination … ‘desire’ + ‘knowledge’ … you have a hitter wishing to hit the ball and someone nearby to assist with that happening.

The smiles you see are genuine when a kid learns that they can swing a heavier bat than what they are used to swinging, at speeds that they couldn’t deal with before, and with improved mechanics that have them powering out linedrives.

Me tooo!!!!
Could you post the drill with the 12 year olds with 10-15 oz heavier bats off the 70mph machine you boasted about.
Sure be keen to see some of your work.
As good as you are at manipulating other people video, you could do your magic and just blank out the students face....