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Light Cob oven - Forno Bravo Forum: The Wood-Fired Oven Community



Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.

To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
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Light Cob oven

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  • Light Cob oven

    My goal is a portable pizza oven. No need for bread (I hope). I want to build it myself on the cheap. I have experience using cob and I am also looking for the sculptural element that cob can provide. This oven will need to survive transportation but the mode is as yet undetermined. I know I need to maintain 700 degrees and also strive for an efficient wood burn. Correct?
    Weight is a major factor when selecting transportation vehicles. How light can I go? Perlite plus cob in the walls and a firebrick floor? How thin can the walls be and still hold enough heat? What about reinforcing against the rigors of travel?
    I have many questions and very few answers.
    Thanks for any input.

  • #2
    Re: Light Cob oven

    Did you ever build an oven? Clay is OK for a stable location but might not fare well from all the jarring over roads. The lower the dome, the weaker it will be structurally also. I found a good ratio which works for my clay oven (see attached thread).


    A trailer could handle the weight; my dried cob mix is lighter than the same volume of fire brick. And yes, 750K can easily be reached and will be easier to achieve when insulated.

    You could do some extra engineering to make a clay oven last longer for transportion but If your going to that extra trouble to make it portable you would best be served by making a poured refractory dome or a firebrick dome with embedded wire over the dome's concrete for extra structural strength.
    Last edited by marklewis; 03-31-2010, 08:32 PM.


    • #3
      Re: Light Cob oven

      You understand that a masonry oven absorbs and reflects heat: The mass of the oven is what makes it work. If you make it from a perlite mixture you won't have the thermal mass to make it work.

      And yes, dried, unfired clay will crumble when exposed to vibration.
      My geodesic oven project: part 1, part 2


      • #4
        Re: Light Cob oven

        Hmm, it might - and I do mean might - be possible. Good shocks will not be optional. I strongly recommend trying it out a small scale - nothing that won't fit a 16x16 paver (you can go smaller but I think the 16x16 will give you a better representation). Instead of ordinary cob you could try a 'daub and wattle' version using chicken wire as the skeleton. That would give it some more 'flexibility' (too late at night for vocabulary...).
        "He is no fool who gives what he cannot keep to gain what he cannot lose." - Jim Elliot

        "Success isn't permanent and failure isn't fatal." -Mike Ditka