A topic to polarise opinion.....'Specs' are they all that?
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Author Topic: A topic to polarise opinion.....'Specs' are they all that?  (Read 10133 times)

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edge

Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #60 on: September 14, 2022, 12:53:00 PM »
Ha yeah that's more like it.

F (the force applied to the ball) = M (the mass of the ball) x A (the acceleration of the ball)
OR
F (the force applied to the bat) = M (the mass of the bat) x A (the acceleration of the bat)

If you want to calculate the exit speed of a ball hit by a bat of known mass and speed, you're going to need something more like this (simplified obviously):

Mball x Vball bowled + Mbat x Vbatswing = Mball x Vball exit + Mbat x Vbat after collision
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t2ylo

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #61 on: September 14, 2022, 01:19:34 PM »
So “size” makes about the same difference as “stickers”?
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Yorkershire

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #62 on: September 14, 2022, 01:24:06 PM »
Quote from: t2ylo on September 14, 2022, 01:19:34 PM
So “size” makes about the same difference as “stickers”?
No no if you have go faster stcikers just liek car paint jobs... the bat will be amazing!

lol Yes size shouldn't have an effect.

Just to throw a spanner in... what does the structure/density of the bat have on the springy-ness of the surface?   ;)
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Tom

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #63 on: September 15, 2022, 02:06:33 PM »
Give Sam Fisher's thesis a read for just an idea of the physics involved in creating an improved cricket bat: https://purehost.bath.ac.uk/ws/portalfiles/portal/188135795/Sam_Fisher_thesis.pdf
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Kulli

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #64 on: September 15, 2022, 04:00:49 PM »
I struggle to see the ball without my specs so they’re pretty vital!
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Bats_Entertainment

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #65 on: September 15, 2022, 04:38:14 PM »
Quote from: edge on September 14, 2022, 12:53:00 PM
Ha yeah that's more like it.

F (the force applied to the ball) = M (the mass of the ball) x A (the acceleration of the ball)
OR
F (the force applied to the bat) = M (the mass of the bat) x A (the acceleration of the bat)

If you want to calculate the exit speed of a ball hit by a bat of known mass and speed, you're going to need something more like this (simplified obviously):

Mball x Vball bowled + Mbat x Vbatswing = Mball x Vball exit + Mbat x Vbat after collision

Why didn't you say?   ;)
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Chompy9760

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #66 on: September 16, 2022, 12:59:24 AM »
Quote from: Tom on September 15, 2022, 02:06:33 PM
Give Sam Fisher's thesis a read for just an idea of the physics involved in creating an improved cricket bat: https://purehost.bath.ac.uk/ws/portalfiles/portal/188135795/Sam_Fisher_thesis.pdf

That is some pretty heavy reading, and I'm one of the few who don't mind a bit of maths and physics!!
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Chompy9760

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #67 on: September 16, 2022, 01:05:32 AM »
Quote from: Yorkershire on September 14, 2022, 01:24:06 PM
Just to throw a spanner in... what does the structure/density of the bat have on the springy-ness of the surface?   ;)

Not that it particularly answers the question, but on page 95 of the above mentioned document, there are some interesting electron microscope pics of willow cellular structure of different parts of the bat.  Very interesting to see the effect of pressing/knocking, and how much of the 'wood' is actually air!
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InternalTraining

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #68 on: September 16, 2022, 04:06:13 PM »
Quote from: edge on September 14, 2022, 12:53:00 PM

If you want to calculate the exit speed of a ball hit by a bat of known mass and speed, you're going to need something more like this (simplified obviously):

Mball x Vball bowled + Mbat x Vbatswing = Mball x Vball exit + Mbat x Vbat after collision

I think that is correct.

Question: We saw a phase where low-density bats were popular. Does the volume of the bat play any role in this transference of energy (force?) from bat to ball? What happens to the vibration of the bat (nodes of percussion?) when a bat has a larger volume but lighter due to low-density cleft?
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InternalTraining

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #69 on: September 16, 2022, 04:13:11 PM »
Quote from: Tom on September 15, 2022, 02:06:33 PM
Give Sam Fisher's thesis a read for just an idea of the physics involved in creating an improved cricket bat: https://purehost.bath.ac.uk/ws/portalfiles/portal/188135795/Sam_Fisher_thesis.pdf

From page 105:

Quote
All of the sections investigated during this chapter are interlinked, as the crushed cellular
structure is associated with an increase in density and the enhancement in the flexural stiffness
of the wooden samples. This is advantageous to the player as an increase in flexural stiffness is
associated with an increase in post impact ball velocity and thus an improvement in
performance. Finally, by crushing the cellular structure, the resistance to indentations and
splitting is improved as the density of the sample is increased. Therefore, the face of the bat
may last longer before showing signs of mechanical deterioration and a reduction in
performance.
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Kulli

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #70 on: September 16, 2022, 04:24:29 PM »
Doesn’t that basically just say pressing a cleft is positive?
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InternalTraining

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #71 on: September 16, 2022, 04:34:50 PM »
^ Pressing. Knocking. Playing in a bat.
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edge

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #72 on: September 20, 2022, 07:22:19 AM »
Quote from: InternalTraining on September 16, 2022, 04:06:13 PM
Question: We saw a phase where low-density bats were popular. Does the volume of the bat play any role in this transference of energy (force?) from bat to ball? What happens to the vibration of the bat (nodes of percussion?) when a bat has a larger volume but lighter due to low-density cleft?
Larger volume gives a slightly stiffer bat, so slightly better transfer of energy into the ball. Minimal if any difference to vibrational nodes.
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InternalTraining

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #73 on: September 20, 2022, 05:05:33 PM »
^ Ok. So, a low-density, larger (than normal volume) cleft is better for a lighter bat.

I wonder if bat makers have a formula to compare rebound from  a low-density cleft/bat of X weight v/s normal-density cleft/bat of Y (> X) weight. Example: Low-density bat of 2lb-8oz ping/rebound = normal-density bat of 2lb-11oz.
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Kulli

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Re: A topic to polarise opinion.....'Specs' are they all that?
« Reply #74 on: September 20, 2022, 07:17:21 PM »
Wonder no more, they don’t.
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