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## winchester workshop pics

### Tony Ferguson on tue 1 oct 02

Anyone who would like to see Tony Winchester pictures from pottery workshop

http://www.aquariusartgallery.com/winchester.htm

Thank you.

Tony Ferguson
On Lake Superior, where the sky meets the Lake

Stoneware, Porcelain, Raku
www.aquariusartgallery.com
218-727-6339
315 N. Lake Ave
Apt 312
Duluth, MN 55806

----- Original Message -----
From: "Lloyd Cledwyn"
To:
Sent: Tuesday, October 01, 2002 2:17 PM
Subject: Re: volume of a catenary arch

> I was wondering that myself having just helped build a kiln and this
> allowed my math major side to get the better of me.
>
> Short answer care of Ward Burner website
> http://www.wardburner.com/kiln_volume.cfm
>
> CF = L x Arch area (4/3 H x 1/2 Base Width)
> a 6 foot deep kiln, 5 feet high and 4 feet at the base is 6*6.66*2 =
> 80cubic feet!
>
> Long answer, you will have to take the integral of the curve of the
> cantenary arch, which is not a simple parabola as I originally thought.
> The equation is a*cosH(a/t). I worked for a while with my rusty
> trigonometry and gave up. L x 4/3H x 1/2B looks like a great
approximation
> for me.
>
> Cheers
> Lloyd
>
>
> --On Monday, September 30, 2002 8:15 PM -0700 Eric Suchman
> wrote:
>
> > Does any one know of a formula for the volume of a catenary arch kiln?
> > Eric in Oceanside
> >
> >
_________________________________________________________________________
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>
> **************
> Lloyd Cledwyn
> Saint Paul, MN
> www.llpots.com
> 651-334-7846
> **************
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
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>
> Moderator of the list is Mel Jacobson who may be reached at