Graeme Wilkie's anagama 2

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The anagama is quite tall towards to firebox end, so there is room for high stacks of pots.

Below is a plan of Graeme's anagama. This image is from a slightly distorted photo of the actual plan so cannot be trusted entirely. The kiln  has a slope of about 24 degrees and seems very steep to anyone used to more moderately inclined anagamas. Note the undulating orange line below the original  line marking the top of the arch. See Graeme's comments under the image.
Plan for Graeme Wilkie's anagama

Graeme's comments:  The slope is 24 degrees .The purpose of this, plus the  height of the stack (now  6 metres) is to accelerate the velocity of the  flame path. My ceramic carreer seems to always lead me to  'breaking  rules' .This design can embrace a range of firing cycles.  It was designed by Hikaru Shimamura of Bizen and myself. The attached  drawings were forwarded  to Hikaru in Japan, and  in his reply noted that the design was near perfect: "softly lines like a woman" .

The line of the arch was softened as indicated, with a tight arched  area to the rear of the main chamber acting like a 'damper chamber' .  The air ducts that lie under the  chamber floor are for including  other substances like water,charcoal etc The 8 passive dampers either  side of the exit flue act to influence the 'pull' of heat from either  side of the chamber. This kiln, after numerous firings, is easy to  fire.I do not know the fuel consumption or the cubic capacity of the  interior. We use Radiata (Pinus radiata) or Macrocarpa (Cupressus macrocarpa).

The firing lasts six days from startup to close down. I really like the destructive nature of slow reduction cooling. The method basically is an intense over loading of the firebox and all side stokes areas,  followed by a quick mud up of every  port, then the damper is closed and the chimney sealed. The trick is not to burn  your eyebrows as you  seal the side stoke ports, then the front firebox, then seal the chimney. The dangerous bit is at  the chimney sealup as the back pressure gets a little serious.
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