Movember --- Ask the bat maker
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Colesy

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Re: Movember --- Ask the bat maker
« Reply #75 on: November 23, 2010, 11:46:27 PM »

Small edges, no concaving
Big edges, lots of concaving
Small edges, lots of concaving
Big edges, no concaving.

Which is best for a large middle or 'sweet spot'?
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SAF Bats

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Re: Movember --- Ask the bat maker
« Reply #76 on: November 24, 2010, 12:13:31 AM »

Interesting. I had not considered that aspect and shall ponder further. Clearly the bat hitting ball involves a collision somewhat different to dropping a ball on the bat or hitting a bat with a mallet.
So how might that be worked into how you determine the optimum press?

Batted ball speed = q x Velocity of ball + (1 + q)Velocity of bat
Where q is calculated as follow q is the Bouncabilty of a bat or Apparent Coefficient of Restitution [ACoR]

Pressing is related to the willow its natural attributes, grains, volume etc and therefore the pressing pressure required, each piece of willow should be treated differently because of this.  The pressing changes the elasiticity of the willow and therefore the rebound effects the willow.

As you can see ACoR being the initial multiplier this will have the biggest effect on batted ball speed .  If ACoR remained constant and the ball velocity increased and the bat speed increased you wouldn't have the same increase as you would if you raised  the ACoR.

There are ways of getting a really good pressing but it isn't really related to the CoR.  CoR or ACoR is a product of good pressing so is batted ball speed. 

So to answer your question, nothing that you mention determines the optimum pressing
« Last Edit: November 24, 2010, 12:15:22 AM by SAF Bats »
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Re: Movember --- Ask the bat maker
« Reply #77 on: November 24, 2010, 09:25:26 AM »

Small edges, no concaving
Big edges, lots of concaving
Small edges, lots of concaving
Big edges, no concaving.

Which is best for a large middle or 'sweet spot'?

In basic terms whichever of those options has the largest amount of wood in the middle for the weight.  It isn't that straight cut but if everything else was equal that would the identifier of middle size.
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Re: Movember --- Ask the bat maker
« Reply #78 on: November 24, 2010, 09:30:06 AM »

Hi Admins / Mods can someone lock this thread around Midday today please

Few more hours for some question and maybe Monty will be back :D
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tim2000s

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Re: Movember --- Ask the bat maker
« Reply #79 on: November 24, 2010, 10:11:12 AM »

Given that MMI is an integral function that has mass density of a body at a point along it's length, is the coincidence of the highest mass density with the centre of percussion the norm or can you create an offset bat where these are distributed, such as to generate a lighter pick up for example, with the highest mass density occurring at a point above the centre of percussion?
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mdl_1979

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Re: Movember --- Ask the bat maker
« Reply #80 on: November 24, 2010, 10:12:42 AM »

What's the heaviest bat you have ever made? 
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snafu

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Re: Movember --- Ask the bat maker
« Reply #81 on: November 24, 2010, 10:38:06 AM »

Is there any other wood that comes close to willow in terms of weight and density that a bat could be made from that would perfom simularly
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Re: Movember --- Ask the bat maker
« Reply #82 on: November 24, 2010, 10:52:05 AM »

A quick plug
 
For a donation of just £10 pounds here http://uk.movember.com/mospace/774848/

You could win something like this!!!!
 




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Re: Movember --- Ask the bat maker
« Reply #83 on: November 24, 2010, 11:28:39 AM »

Given that MMI is an integral function that has mass density of a body at a point along it's length, is the coincidence of the highest mass density with the centre of percussion the norm or can you create an offset bat where these are distributed, such as to generate a lighter pick up for example, with the highest mass density occurring at a point above the centre of percussion?



In short yes, it made for a strange looking bat but this was just a prototype and can be worked on to make it loads better.  I just got to busy to complete the profile shape

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Re: Movember --- Ask the bat maker
« Reply #84 on: November 24, 2010, 11:30:52 AM »

What's the heaviest bat you have ever made? 

3lb 2oz I think
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Re: Movember --- Ask the bat maker
« Reply #85 on: November 24, 2010, 11:36:47 AM »

Is there any other wood that comes close to willow in terms of weight and density that a bat could be made from that would perfom simularly

Nope unless you try just Salix Alba like the old days...  You can't get the strength or elasticity required from other wood based on the shapes you will need e.g Oak weighs too much
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tim2000s

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Re: Movember --- Ask the bat maker
« Reply #86 on: November 24, 2010, 11:41:17 AM »


In short yes, it made for a strange looking bat but this was just a prototype and can be worked on to make it loads better.  I just got to busy to complete the profile shape



It does make a funny profile doesn't it? I  guess that you can do the same in reverse too...
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peplow

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Re: Movember --- Ask the bat maker
« Reply #87 on: November 24, 2010, 11:47:45 AM »

Whats the lightest (full size) bat you've ever made? (might as well after asking the heaviest!) after grips, stickers etc..
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tim2000s

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Re: Movember --- Ask the bat maker
« Reply #88 on: November 24, 2010, 11:51:30 AM »

When starting to design a bat profile do you technically decide upon the MMI, mass Density along length and CoP position that you want and then produce technical designs?
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SAF Bats

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Re: Movember --- Ask the bat maker
« Reply #89 on: November 24, 2010, 11:58:26 AM »

Whats the lightest (full size) bat you've ever made? (might as well after asking the heaviest!) after grips, stickers etc..

2lb 6oz it was for a 1st Class Cricketer but didn't have my stickers on it  :o
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