Custom Bats Cricket Forum

Equipment => Bats => Bat Making => Topic started by: GarrettJ on March 24, 2015, 02:27:29 PM

Title: why do cricket bats have a spine?
Post by: GarrettJ on March 24, 2015, 02:27:29 PM
im going to make a new bat this weekend and im thinking of making the spine flat. a sort of parallelogram shape. Any reason why this wouldn't work and add more power across the blade?

I may do it on an old bat first to see how it feels.
Title: Re: why do cricket bats have a spine?
Post by: KIPPERS on March 24, 2015, 03:23:20 PM
Structural rigidity. bit like a girder
Title: Re: why do cricket bats have a spine?
Post by: Buzz on March 24, 2015, 03:30:01 PM
Structural rigidity. bit like a girder

Did you get that from the GN video about concaving?
Personally I think it is entirely about aesthetics.

If you don't have a spine you end up with a club - much like my bat
http://custombats.co.uk/cbforum/index.php?topic=30489.0 (http://custombats.co.uk/cbforum/index.php?topic=30489.0)

personally I think it works just fine!
Title: Re: why do cricket bats have a spine?
Post by: tushar sehgal on March 24, 2015, 03:38:34 PM
Did you get that from the GN video about concaving?
Personally I think it is entirely about aesthetics.

If you don't have a spine you end up with a club - much like my bat
[url]http://custombats.co.uk/cbforum/index.php?topic=30489.0[/url] ([url]http://custombats.co.uk/cbforum/index.php?topic=30489.0[/url])

personally I think it works just fine!


I agree
Title: Re: why do cricket bats have a spine?
Post by: tim2000s on March 24, 2015, 04:07:23 PM
Structural rigidity. bit like a girder
Bull Manure. Scoops work without them, Tour shapes work without them.
Title: Re: why do cricket bats have a spine?
Post by: GarrettJ on March 24, 2015, 04:08:52 PM
the back would be shaped like this

(http://mathbones.wikispaces.com/file/view/trapezoidal_prism.JPG/222073636/269x200/trapezoidal_prism.JPG)

Title: Re: why do cricket bats have a spine?
Post by: liscon12 on March 24, 2015, 04:15:47 PM
A trapezoid shape then, will be interesting to see the end result.
Title: Re: why do cricket bats have a spine?
Post by: Neon Cricket on March 24, 2015, 04:16:12 PM
Go for it, would be interesting to see the outcome!
Title: Re: why do cricket bats have a spine?
Post by: Seniorplayer on March 24, 2015, 04:17:40 PM
I have a Magnum without a spine it has a rounded back flat face and goes like a train.
Title: Re: why do cricket bats have a spine?
Post by: uknsaunders on March 24, 2015, 04:21:25 PM
the back would be shaped like this

([url]http://mathbones.wikispaces.com/file/view/trapezoidal_prism.JPG/222073636/269x200/trapezoidal_prism.JPG[/url])


would that not be a double spine?

(http://www.cricket-hockey.com/shop/shopimages/products/normal/slaz-v1200-cricket-bat-13.jpg)
Title: Re: why do cricket bats have a spine?
Post by: GarrettJ on March 24, 2015, 04:34:35 PM
like that slazenger without the scoop .... that bit would be a flat spine

Title: Re: why do cricket bats have a spine?
Post by: procricket on March 24, 2015, 04:39:18 PM
My ziZi has no spine works very well
Title: Re: why do cricket bats have a spine?
Post by: FattusCattus on March 24, 2015, 04:41:10 PM
Mmmmmmmmmmmmmmmmm! Kit Kat Chunky!

...........sorry, got a bit distracted.
Title: Re: why do cricket bats have a spine?
Post by: tushar sehgal on March 24, 2015, 04:58:45 PM
@GarrettJ are you planning making the non-existent/flat spine run all the way to the bottom? so the spine and edge height is the same at the toe but both rise (spine more significantly) as you move up the blade and then merge again near the handle?
Title: Re: why do cricket bats have a spine?
Post by: GarrettJ on March 24, 2015, 05:08:56 PM
i think the handle part would be as normal and then rise into the square spine like a duuckbill at the splice.

On the toe probably taper it off like a duckbill otherwise it may be very bottom heavy.

I have a new bat i made that i experiment on with my tools so i will try and flatten it out to show people what i am planning.

I dont want to waste a proper cleft and be left with a bat that is no use to me as i have retired from playing now.
Title: Re: why do cricket bats have a spine?
Post by: Northern monkey on March 24, 2015, 05:23:38 PM
would that not be a double spine?

([url]http://www.cricket-hockey.com/shop/shopimages/products/normal/slaz-v1200-cricket-bat-13.jpg[/url])


I just don't get that scoop in the middle bit of that slazenger?
It just looks like work, for the sake of it?

The flat spline idea looks much better, not easy to do, but if you could get decent pick up and keep the toe area quite thick, could be a very usable bat
I'm not a fan of big spines, I sanded mine off my laver, and performance was still first class.
Title: Re: why do cricket bats have a spine?
Post by: uknsaunders on March 24, 2015, 05:29:33 PM
I think when somebody puts a shark fin spine on it looks stupid ie. concave the bat to hell with a tiny sliver in the middle for a spine. A decent full bodied spine does, or should, put more power into the shot. I tend to think low spine bats lack a bit of power in the middle but make up for it with a wider hitting area - could just be my perception.
Title: Re: why do cricket bats have a spine?
Post by: KIPPERS on March 24, 2015, 05:57:04 PM
Did you get that from the GN video about concaving?
Personally I think it is entirely about aesthetics.

If you don't have a spine you end up with a club - much like my bat
[url]http://custombats.co.uk/cbforum/index.php?topic=30489.0[/url] ([url]http://custombats.co.uk/cbforum/index.php?topic=30489.0[/url])

personally I think it works just fine!


No I got it from a background in material science.
Title: Re: why do cricket bats have a spine?
Post by: KIPPERS on March 24, 2015, 06:03:18 PM
you certainly don't need the shark fin type spine, The depth of timber front to back is in effect the the spine. Its just basic structural engineering.
Title: Re: why do cricket bats have a spine?
Post by: KIPPERS on March 24, 2015, 06:05:44 PM
And yes it may still hit the ball and feel fine. But I bet it wont last that long.
Title: Re: why do cricket bats have a spine?
Post by: procricket on March 24, 2015, 06:13:04 PM
(http://i61.tinypic.com/160ougz.png)
(http://i62.tinypic.com/dnhil2.png)
(http://i60.tinypic.com/1o87yw.jpg)
(http://i60.tinypic.com/oa9g75.jpg)
(http://i61.tinypic.com/2h2m9m8.jpg)


As neutral a bat as i could come up with
Title: Re: why do cricket bats have a spine?
Post by: InternalTraining on March 24, 2015, 06:55:45 PM
^ Have you net with this bat yet? How does it feel? I love this kind of a design!
Title: Re: why do cricket bats have a spine?
Post by: Northern monkey on March 24, 2015, 07:11:13 PM
What's the toe thickness Dave?
How's it pick up for its dead weight?

Like it a lot
Title: Re: why do cricket bats have a spine?
Post by: e4sby on March 24, 2015, 07:31:42 PM
There is a very very nice crown 'zizi' at b3, was down there on Saturday.

I'm not a fan of the shape but it certainly picks up a couple of ounces lighter than you think. Dave loves his it is certainly not your usual bat design.
Title: Re: why do cricket bats have a spine?
Post by: procricket on March 24, 2015, 07:32:20 PM
 toe thickness around 29mm

Pick up is brilliant

The tour which is similar never had a touch of scooping like this one around the toe area great coverage a great all round bat netted maybe around 200 overs through it 
Title: Re: why do cricket bats have a spine?
Post by: Buzz on March 24, 2015, 08:13:37 PM
John, it sounds as if you are making something like the St Peter's bat shape that Tony Grieg used for a while.
Title: Re: why do cricket bats have a spine?
Post by: Mortimer on March 24, 2015, 08:20:06 PM
im going to make a new bat this weekend and im thinking of making the spine flat. a sort of parallelogram shape. Any reason why this wouldn't work and add more power across the blade?

I may do it on an old bat first to see how it feels.


It was done by SP in the 70s with their Master flatback design

http://2.bp.blogspot.com/-vXnOD3l8zKg/URl_HY5hhkI/AAAAAAAAADs/US3RKfEve0c/s1600/1977+Tony+Greig+St+Peter.jpg (http://2.bp.blogspot.com/-vXnOD3l8zKg/URl_HY5hhkI/AAAAAAAAADs/US3RKfEve0c/s1600/1977+Tony+Greig+St+Peter.jpg)

Title: Re: why do cricket bats have a spine?
Post by: GarrettJ on March 24, 2015, 10:03:03 PM
quickly hacked at an old bat

(https://pbs.twimg.com/media/CA5GBAvWUAAozbN.jpg:large)
Title: Re: why do cricket bats have a spine?
Post by: fabfill on August 23, 2015, 05:26:16 AM
I just unintentionally made one. Feels like a beast. Will try to get some pics up later