[Cob] A cleaner cob oven for the future

[Ray Cirino]

Dear Bill,
if it were easy everyone would be doing it. Just think of a half dome igloo 
inserted in a brick  furnace shaped like the metal dome, but with a 2"+ gap for 
the fire to flow. As it wraps around the dome it increases it's draw and 
increases the temp.  There are many other benefits, like no sparks out the top, 
water heater for distilling or hot tub and the tear drop can become a steam 
generator if you're a good engineer. Make sure your air input is not a fixed 
duct, so you can pull it out to fill with firewood and then put back to become a 
real hot air blowing jet. Test run everything before installing. You may make 
another hot discovery. It's really great to know there's someone else out there 
doing something. My other list server people just talk about things. Keep in 
touch.
Ray
 The Great Challenges we now face as a species present the very opportunities 
that are giving birth to Ecological, Psychological, and Spiritual 
Sustainability.




________________________________
From: Bill Christensen <billc_lists at greenbuilder.com>
To: coblist at deatech.com
Sent: Mon, February 7, 2011 2:19:37 AM
Subject: Re: [Cob] A cleaner cob oven for the future

On 4/5/10 5:04 PM, Ray Cirino wrote:
> Dear Cobbers,
> I'm days away from test firing this inner chamber cob oven and wantd to share 
>the news. If it works as I know it will, you'll be creating these incerts like 
>this stainless steel igloo shape. The heat from the fire is rapid and I see 
>closing the stack after the fire is out to hols in the heat. Otherwise you burn 
>for hours with black smoke killing the atmosphere. SunRay Kelly will tell you as 
>well, we have junkyards here in LA that have it all that can change the way we 
>build.
> 
> http://people.tribe.net/raycirino/photos/ec9b6a37-4e7a-41cd-be13-6f4aeee03a77
> 
> The Mad Scientist,
> Ray
> 
>    
Hi Ray,

I've got some questions about your rocket cob oven that I haven't been able to 
figure out from your images or your emails to the list. I'm thinking about 
building one, possibly using a blown-out well pressure (bladder) tank, which 
should be available free or cheap from some of the well drillers around here (or 
Freecycle), and should be available in about the right size, with a base made in 
part from some scavanged AAC block.

How do you maintain a gap between the metal insert and the cob while building? 
How big of a gap do you use?

Your photo page vaguely mentions that the oven dome is brick and cob - or maybe 
I'm reading that wrong, and the brick is used in the base. Where and how are the 
bricks involved?

I'm not sure I understand what's up with the teardrop steamer. Can you explain 
in more detail what's up with that?

Thanks!

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