Kiln Principle 3
Jeff Guin
about Kiln Principle #3. I thought for sure the group could help me
out. Anyway principle #3 states that a specific amount of grate area
is needed for natural draft. Grate area being the firebox, I believe.
And, for wood fuel: the firebox should be 10 times greater than the
horizontal section of the chimney. My question is: If I have a 10
cubic foot fire box does this mean I have 1 foot of chimney height?
Jeff, in fridgid
Coon Valley, WI
tb
| key word is horizontal. T. E. Brown --- On Thu, 12/31/09, Jeff Guin <mudh...@hotmail.com> wrote: |
|
Paul Herman
I think Fred and you are talking about two different measurements. You
are talking about volume (cubic feet) and Fred is talking about square
feet (grate area), looking down on the floor plan, and the horizontal
section of the chimney (square feet).
So in answer to your question < If I have a 10
>
> cubic foot fire box does this mean I have 1 foot of chimney height?>
my answer is no. It means if the chimney is one square foot in cross
section, then you should have 10 square feet of grate area.
best wishes,
Paul Herman
Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/
Jeff Guin
Jeff.
http://mudwerks.blogspot.com http://www.flickr.com/photos/mudhead99/
>
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Jeff Guin
http://mudwerks.blogspot.com http://www.flickr.com/photos/mudhead99/
Date: Thu, 31 Dec 2009 06:23:04 -0800
From: nacl...@yahoo.com
Subject: Re: *WoodKiln* Kiln Principle 3
To: wood...@googlegroups.com
Hotmail: Free, trusted and rich email service. Get it now.
Micahel Banyai
On Dec 31 2009, 10:23 am, Jeff Guin <mudhea...@hotmail.com> wrote:
> Thanks T.E. Happy New Year.
>
> http://mudwerks.blogspot.comhttp://www.flickr.com/photos/mudhead99/
>
> Date: Thu, 31 Dec 2009 06:23:04 -0800
> From: nacla...@yahoo.com
> Subject: Re: *WoodKiln* Kiln Principle 3
> To: wood...@googlegroups.com
>
> key word is horizontal.
>
> T. E. Brown
>
> --- On Thu, 12/31/09, Jeff Guin <mudhea...@hotmail.com> wrote:
>
> From: Jeff Guin <mudhea...@hotmail.com>
> Subject: *WoodKiln* Kiln Principle 3
> To: "WoodKiln" <wood...@googlegroups.com>
> Date: Thursday, December 31, 2009, 8:34 AM
>
> I have been reading Fred Olsen's "The Kiln Book" and had a question
> about Kiln Principle #3. I thought for sure the group could help me
> out. Anyway principle #3 states that a specific amount of grate area
> is needed for natural draft. Grate area being the firebox, I believe.
> And, for wood fuel: the firebox should be 10 times greater than the
> horizontal section of the chimney. My question is: If I have a 10
> cubic foot fire box does this mean I have 1 foot of chimney height?
>
> Jeff, in fridgid
> Coon Valley, WI
>
> --
>
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Micahel Banyai
1 early on then later says he now usually uses 7 to 1 and oh, by the
way the groundhog is 4 to 1. I put this "Principle" in the wild ass
guess pile. Niles Lou, in his "The Art of Firing" also chides him on
page 24. Steve Harrison's "Laid back Woodfiring" is very good if you
are going to design a kiln. Read all you can, take all rules with due
caution, steal a good design if you can find one that fits your needs.
Every design has trade offs, only you can decide what is important to
you. Some day when this group is mature I would hope we would have a
file of active wood kiln designs. Size, budget, location, experiance
all make a difference. Sizeing to standard kiln shelves always made
sense to me..send an email if you want to talk it over, warmest
regards, Michael banyai, Petoskey Michigan
> From: Jeff Guin <mudhea...@hotmail.com>
> Subject: *WoodKiln* Kiln Principle 3
> To: "WoodKiln" <wood...@googlegroups.com>
> Date: Thursday, December 31, 2009, 8:34 AM
>
> I have been reading Fred Olsen's "The Kiln Book" and had a question
> about Kiln Principle #3. I thought for sure the group could help me
> out. Anyway principle #3 states that a specific amount of grate area
> is needed for natural draft. Grate area being the firebox, I believe.
> And, for wood fuel: the firebox should be 10 times greater than the
> horizontal section of the chimney. My question is: If I have a 10
> cubic foot fire box does this mean I have 1 foot of chimney height?
>
> Jeff, in fridgid
> Coon Valley, WI
>
> --
>
> You received this message because you are subscribed to the Google Groups "WoodKiln" group.
> To post to this group, send email to wood...@googlegroups.com.
> To unsubscribe from this group, send email to woodkiln+u...@googlegroups.com.
> For more options, visit this group athttp://groups.google.com/group/woodkiln?hl=en.
>
> --
> You received this message because you are subscribed to the Google Groups "WoodKiln" group.
> To post to this group, send email to wood...@googlegroups.com.
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gary navarre
I don't think I've read Fred Olsen's book or seen any free drawings of Steve Harrison's designs but I'm thinking my design is comparable and when finally fired will prove quite efficient and easy to fire. For some crawling through the door might present a problem if they have a gut but that's another issue. I have helped fire an Olsen Fast Fire in college...
http://public.fotki.com/GindaUP/ca/kpap/eo/
... however in my mind I was headed in a different direction with a combination of an early Chinese high fire profile...
http://public.fotki.com/GindaUP/ca/kpap/ek75/gmb.html
... and and the Western Hobbed Bourry firebox. Then I added a Michigan Hillbilly Pignose just in cast I wanted to get laid during aburi fire...
http://public.fotki.com/GindaUP/ca/kpap/nvhga/pp.html
... or like in the past finish painting someones house and make some real money. However making outside money is not what we are discussing.
I got my design ideas from Rhodes kiln building book, Michal Cardew's "Pioneer Pottery", and there are also two decent ways to guestimate the flue to chamber to stack proportions. I do know the Bourry does not need as much grate cross section as up draft of hell hole fire boxes. I'll leave it up to you to wade through my construction albums to see the exact details but the width of the hob is 32"-36" to hold sticks 35½" down to 32" and the length of the hob is close to 14" giving a basic grate area of 471 square inches...
http://public.fotki.com/GindaUP/ca/kpap/uph08pov/progressoverview3.html
The throat arch is an arch with a 16" radius...
http://public.fotki.com/GindaUP/ca/kpap/hst/shelvinglayouttest5.html
The chamber is 9' long (65 cu.ft.) with more or less parabolic curves in all sections to a taper to the exit flue of about 360 sq.in. ...
http://public.fotki.com/GindaUP/ca/kpap/lc/ashdepositinchimneybase3.html
After that I think it makes the right angle turn to about 306sq.in. and tapers to 9"x9" (81 sq.in.) at 11".
So far I have less than 5 grand into materials so I hope to cover that after the second firing if the first turns out crap. Good luck in your search... my dog Olof is scratching to go out to another ride so stay in there and don't let it fool ya eh!
Gary Navarre
Navarre Pottery
Navarre Enterprises
Norway, Michigan, USA
http://www.youtube.com/GindaUP
http://public.fotki.com/GindaUP/
--- On Fri, 1/1/10, Micahel Banyai <mikeb...@gmail.com> wrote: