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[Manormanic]

top edge?

[RightArmRapid]

Maybe not, but I've hit a six off the edge of one of my bats.....

Facing mr morkel eh?

[tim2000s]

Top edge over cow.... We all know how good those Ultras are!

[PeteW]

I probably draw issue with your diagram as it on shows the benefit of the middle of the bat. It proves a point but hides another, as others have mentioned big edges = better off centre power.

Could I ask you to explain this a little further as I don't follow the logic. As I mentioned above surely if you're hitting the ball off the outside portion of the bat it will twist in your hand, so energy is lost and you'll never be able to generate a lot of power. So to hit the ball hard you need it to make contact somewhere around the middle two thirds (say) of the blade's surface.

I'm not saying you're wrong - I just want to understand your argument fully.

Just to touch on some of the other points brought up here - Obviously I agree that middle position and pick-up are also very important. But shaping a blade is always delicate balance and it's all about maximising the use of the willow you have available. I'm theorising that big edges are potentially a waste of wood, which could be removed to improve pickup without a noticeable loss in performance.

[Chad]

I would read a part of norbs' batmaking blog, which sheds some light to edge size. Also teaches you a lot of other stuff, which may not help you make runs, but it certainly is quite an interesting read. Yes, even the physics of it is relatively interesting.

http://www.whichcricketbat.com/cricket-bat/cricket-bats-edges-concaving-myths-smoke-and-mirrors

Check out his other stuff as well. I think he graduated as a Mechanical Engineer, so he uses some stuff he learned from university and applies it to batmaking. It actually makes me wonder if I'll graduate from engineering and become a podshaver instead too. Sounds like a much more satisfying route than working in an oil rig!

[tim2000s]

I would read a part of norbs' batmaking blog, which sheds some light to edge size. Also teaches you a lot of other stuff, which may not help you make runs, but it certainly is quite an interesting read. Yes, even the physics of it is relatively interesting.

http://www.whichcricketbat.com/cricket-bat/cricket-bats-edges-concaving-myths-smoke-and-mirrors

Check out his other stuff as well. I think he graduated as a Mechanical Engineer, so he uses some stuff he learned from university and applies it to batmaking. It actually makes me wonder if I'll graduate from engineering and become a podshaver instead too. Sounds like a much more satisfying route than working in an oil rig!

Norbs and I have discussed this stuff at some length (I too am a Mech Eng by degree, if not by trade).

There is a lot of theoretical discussion about the benefits of bigger edges in terms of torque as well, but frankly most of it is rubbish, and big edges are really a fashion thing.

[PeteW]

The geek in me finds it a bit frustrating that this is all just theoretical and the analysis we do is just subjective: "feel the ping on that". I was wondering if dropping a ball onto different parts of a static (clamped) bat from a given height and measuring rebound height (repeated a few times and taking an average) could provide a more quantitative analysis and provide some sort of "ping profile" for a given bat? Was also wondering if pick-up could perhaps be quantified by resting the base of a bat's handle on a pivot and using a force gauge to measure the torque when the bat is horizontal.

[Johnny]

The geek in me finds it a bit frustrating that this is all just theoretical and the analysis we do is just subjective: "feel the ping on that". I was wondering if dropping a ball onto different parts of a static (clamped) bat from a given height and measuring rebound height (repeated a few times and taking an average) could provide a more quantitative analysis and provide some sort of "ping profile" for a given bat? Was also wondering if pick-up could perhaps be quantified by resting the base of a bat's handle on a pivot and using a force gauge to measure the torque when the bat is horizontal.

PeteW, meet Tim2000s

Tim2000s, meet PeteW

[norbs]

The geek in me finds it a bit frustrating that this is all just theoretical and the analysis we do is just subjective: "feel the ping on that". I was wondering if dropping a ball onto different parts of a static (clamped) bat from a given height and measuring rebound height (repeated a few times and taking an average) could provide a more quantitative analysis and provide some sort of "ping profile" for a given bat? Was also wondering if pick-up could perhaps be quantified by resting the base of a bat's handle on a pivot and using a force gauge to measure the torque when the bat is horizontal.

Welcome to the world of questions about cricket bats!

[tim2000s]

PeteW, meet Tim2000s

Tim2000s, meet PeteW

Pete, take a look at this thread....

http://184.154.5.91/cbforum/index.php?topic=16826.0

[Johnny]

Pete, take a look at this thread....

http://184.154.5.91/cbforum/index.php?topic=16826.0

Was just trying to find that Tim!

[PedalsMcgrew]

PeteW, meet Tim2000s

Tim2000s, meet PeteW

......and now we wait....

[Chad]

Norbs and I have discussed this stuff at some length (I too am a Mech Eng by degree, if not by trade).

There is a lot of theoretical discussion about the benefits of bigger edges in terms of torque as well, but frankly most of it is rubbish, and big edges are really a fashion thing.

I agree, I have a few big edged bats (Around 33mm+), and the ones which performed the best for me are the ones without concaving. Made me go for the decision to just go relatively small edges, around 20-25mm with no concaving and a good spine height. Only benefit big edges will have is that you will get a wider sweetspot, assuming there is no concaving, but with the disadvantage of a heavier bat, therefore slower bat speed and compromised pick up. I'm using heavier bats now, so it doesn't matter a huge amount, but they really aren't needed IMO.

Ofsetting may be something I want to look into a little more. It will be very interesting to see how offsetting the edges performs. Yes, all the technical reasons for it are on the blog, but I've yet to use or see a bat with an offset edge in flesh!

[PeteW]

Pete, take a look at this thread....

http://184.154.5.91/cbforum/index.php?topic=16826.0

That is awesome! What happened?

[tim2000s]

Ofsetting may be something I want to look into a little more. It will be very interesting to see how offsetting the edges performs. Yes, all the technical reasons for it are on the blog, but I've yet to use or see a bat with an offset edge in flesh!

I have two. It does lengthen the sweet spot for a better pick up.

That is awesome! What happened?

It didn't quite go according to plan...

1. You need a high speed camera to get video evidence
2. A non-flat bat face means that you don't have consistent vertical bounce off the bat, meaning that you need to video from more than one direction to measure the deviation from vertical caused by a slight bow due to roller shape to take it all fully into account.
3. It turns out that more than one person is required to do the experiment without bit more automation!