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Barking mad idea? or stunning clever?  RSS feed

 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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Assuming the dimensions work, is it feasible to fit wood-fired rocket in an old discarded oven or similar shell?
e.g.

Has anyone tried?
 
allen lumley
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Gavin Phillips : A late welcome to permies.com, and our sister site richsoil.com, and a Big Welcome to The Rocket and Wood stoves Forum/Threads ! I have learned
not to assume anything that we take for granted is available 'across the pond', Having said that I suddenly occurred to me that In the last 20 yrs self cleaning ovens are
becoming common, and to perform that function they run at advertised temps of 1,000dF having said that. I might be interested in re-reading a few manuals, and finding what
types of insulation materials are in there ! Tearing them apart to mine their treasures would make more sense to me !

ernie and erica Wisner , ernieanderica.info who are moderators on this site, Have a sheet of high temperature glass that becomes a sidewall of 'A' demonstration model
rocket mass heater RMH, and it makes for very Impressive Theater, even watching it on a 19'' screen. In person it must be very impressive - But what would happen to that
glass in a rain/snow storm ! And It must take some careful packing to transport !

The only way I can see using it requires flopping it on its side and totally removing the door, and then you will dealing with its ability to handle the weight, and you probably would
end up with a sub 6'' system, which is a minimum size for anyones D.I.Y. First build! Still as a way of isolating the rocket burner part from a wood floor and possibly re-using the
air flow channels to promote some air circulation if might have some benefits.

An earlier poster to these Threads remarked about the difficulty of getting his mind to> '' Think like Fire, and Flow like a Gas", I am there now, Try it one time and see if you like
it, I think popping spot welds and listening to the ceramic glaze screech will will up my time as Hunt for High Temperature Refractory material !

Just a quick not to say that I consulted with a relative who may make a copy of the Aprovecho bread oven in the future, we went with it as final because we knew it would work !

For the craft ! As Always, Your Questions and comments are Welcome And Solicited! PYRO - Logically Big AL

 
Satamax Antone
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Gaving, for the sake of the art, turn this into a pocket rocket with a pizza stone on the bottom.

 
William Bronson
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Location: Cincinnati, Ohio,Price Hill 45205
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If you want it to be inside an oven, try a double wall oven.
There is an oven in use which is a conventional oven with a rocket exhausting into it.

Use a double wall oven and cut a hole between chambers if you want to contain the rocket itself inside an oven.

I intend to do something similar but make the bottom half of the oven a bell and bake wood on top of that.
Wood gasses would be piped back into the combustion chamber.
The exhaust from the bell part of the oven would be channeled into a bigger bell or a bench.





 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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Satamax Antone wrote:Gaving, for the sake of the art, turn this into a pocket rocket with a pizza stone on the bottom.


This is EXACTLY my intention.
 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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William Bronson wrote:
There is an oven in use which is a conventional oven with a rocket exhausting into it.

Oooh - please provide pictures or URL please!

William Bronson wrote:
Use a double wall oven and cut a hole between chambers if you want to contain the rocket itself inside an oven.

When you write 'double wall oven' do you mean one side-by-side where rocket would go in one side and cooking chamber in the other side? i.e. I'd use something like:



William Bronson wrote:
I intend to do something similar but make the bottom half of the oven a bell and bake wood on top of that.
Wood gasses would be piped back into the combustion chamber.
The exhaust from the bell part of the oven would be channeled into a bigger bell or a bench.

William, In that case I suggest you look at this link. I have seen this retort in action and it is v impressive. Google "charcoal retort kiln" and or "James Hookway"
 
John Adamz
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Location: Springfield, mo
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How about using it for a batch feed rocket stove? You could see the fire thru the door window
 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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John Adamz wrote:How about using it for a batch feed rocket stove? You could see the fire thru the door window

Thanks for that suggestion - obvious to me only because you suggested it . I will now only accept such discarded ovens if they have glass door.
 
R Scott
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You can convert a gas-stove fairly easy. Pull out the gas burner, put in a rocket. Done. It already has the baffles. You may have to set it on a few blocks to get it a little higher off the floor, but it would be at a good working height.

Temp control is another matter entirely!
 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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R Scott wrote:You can convert a gas-stove fairly easy. Pull out the gas burner, put in a rocket. Done. It already has the baffles. You may have to set it on a few blocks to get it a little higher off the floor, but it would be at a good working height.

Temp control is another matter entirely!

Sounds good to me - have you any images of this? Have you done it yourself?
 
William Bronson
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Location: Cincinnati, Ohio,Price Hill 45205
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Thought I posted it before!
Here yah go:

http://permaculturenews.org/2012/10/16/rocket-oven-a-permanent-wall-mounted-kitchen-oven/
 
William Bronson
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Location: Cincinnati, Ohio,Price Hill 45205
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Hookway makes a keen stove/retort, but I want more flexibility in adding and removing char.
Also I think his design suffers from low initial temperature.

The double wall oven is two (usually electric) ovens, one stacked on top of the other in a single unit, designed to
to fit into a cubby in the kitchen cabinetry.


http://thumbs2.ebaystatic.com/d/l225/m/mmmNzHLVdYSeJu5vcJqcucw.jpg



Personally I think the reason to use an oven is the well fitted door, and to a lesser extent the insulation. This makes it good for a retort but only ok for a rocket enclosure.

 
Gavin Phillips
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Location: Dalbeattie, Scotland, UK
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William Bronson wrote:Thought I posted it before!
Here yah go:

http://permaculturenews.org/2012/10/16/rocket-oven-a-permanent-wall-mounted-kitchen-oven/

Thanks v much for that -
here is the image of that oven as new build

and then it was coated in cob:

The writer comments:

I can honestly say I’ve never done an experiment that went so smoothly and which easily met and surpassed my expectations. With only slight modifications and tweaks, this oven was in near daily use for approximately two years.

- so I wonder what happened to the metal shown above? Either temperatures were cool enough it could survive, or the metal burnt away leaving the cob?
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