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pizzahead 10-30-2011 03:58 PM

Inner arch dimensions
 
Hi.

I am building a new 1000mm (42") wood fired oven and have a question about the size of the inner arch opening. I am currently planning it to be 520mm (21.6") wide. My previous oven was 480mm (20") but I would like the extra space to get things in and out.

Any advice would be really appreciated.

Thanks
Jase

mrchipster 10-30-2011 06:13 PM

Re: Inner arch dimensions
 
Quote:

Originally Posted by pizzahead (Post 122789)
Hi.

I am building a new 1000mm (42") wood fired oven and have a question about the size of the inner arch opening. I am currently planning it to be 520mm (21.6") wide. My previous oven was 480mm (20") but I would like the extra space to get things in and out.

Any advice would be really appreciated.

Thanks
Jase

Mine is 21.5 inches wide and 13.5 inches tall with a 10 inch flue and 42 inch diameter oven, hemispherical entry. Breathes very well no smoke out the entry. I think you are right on target.

Chip

pizzahead 11-03-2011 03:39 PM

Re: Inner arch dimensions
 
Thanks Chip.

I set up the arch last night and had a look. I reckon it is a bit too large so have pulled it back in size a wee bit.

I think it will still retain heat well and also draw nicely.

Fingers crossed.

Jase

cobblerdave 11-04-2011 04:26 PM

Re: Inner arch dimensions
 
Gudday
You could always use a blast door to retain the heat while the fire in the oven and keep the entrance big

Regards Dave

Mike D 11-04-2011 10:58 PM

Re: Inner arch dimensions
 
Just make sure that the entry is far enough into the dome so you don't end up with a teardrop. Draw it up, make a couple of cardboard cut outs. Once you start it you have to roll with how the build progresses.

Mike

david lyons 11-06-2011 02:40 PM

Re: Inner arch dimensions
 
Hi,

I am at the same stage of trying to get my mind around the entry arch.

I presume that the inner end of the entry arch bricks actually reach into the oven slightly at the base. Also how important is blending the inner top of the arch, does this affect smoke flow significantly or not? My guess is that some intrusion at the base would tend to direct exhaust gases upwards?

Dave Ly

mrchipster 11-06-2011 03:03 PM

Re: Inner arch dimensions
 
Quote:

Originally Posted by david lyons (Post 123109)
Hi,

I am at the same stage of trying to get my mind around the entry arch.

I presume that the inner end of the entry arch bricks actually reach into the oven slightly at the base. Also how important is blending the inner top of the arch, does this affect smoke flow significantly or not? My guess is that some intrusion at the base would tend to direct exhaust gases upwards?

Dave Ly

Read the post "Octoforno" I believe this is one of the better ways to build an inner arch. My post "Chip's 42 in Minnesota" also follows this technique and it makes for a much easier transition dome to inner arch.

Several others have used this technique and credit goes to those who developed it.

Chip

david lyons 11-06-2011 04:14 PM

Re: Inner arch dimensions
 
Hi Chip,

Thanks muchly for the direction, that is information I knew would be in here somewhere but old farts like me find it daunting to find the way around these sites at first.

Regards

Dave Ly


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