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portable oven - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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  • portable oven

    So the weather has improved slightly and I'm eager to get my oven built. My plan is to do markets, I want to be able to load the oven onto the back of a trailer. I would like advice on what to do next!!! i am unsure about insulation because i dont know if it is ok to use fiberclass/rockwool also should i use re-bar cast in the dome or will this lead to cracks when the iron expands??

  • #2
    Re: portable oven

    Originally posted by cobpaul View Post
    So the weather has improved slightly and I'm eager to get my oven built. My plan is to do markets, I want to be able to load the oven onto the back of a trailer. I would like advice on what to do next!!! i am unsure about insulation because i dont know if it is ok to use fiberclass/rockwool also should i use re-bar cast in the dome or will this lead to cracks when the iron expands??
    If that is the cart you plan to use you need to be prepared to pick up lots of small pieces of oven all over the ground when it tips away from the legs. A two wheel cart of that type with the heavy weight of the oven so far from the ground and a single axle as the point of rotation could cause a catistrophic failure. if tipped the wrong way, you will not be able to hold it back.

    I would rethink the size of the wheels and balance points.

    Fiberglass is also not a good choice as it contains binders that will burn off and be a problem. Ceramic blanket or high ratio mix of perlite or vermiculite and Portland cement would be much better 8/1 up to 11/1 ratio. the higher the better for insulation.

    Just my two cents.

    Chip
    Last edited by mrchipster; 02-24-2013, 11:00 AM.
    Chip

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    • #3
      Re: portable oven

      Do a search on the forum for mobile ovens. There is lots to consider.
      Kindled with zeal and fired with passion.

      Comment


      • #4
        Re: portable oven

        Originally posted by cobpaul View Post
        So the weather has improved slightly and I'm eager to get my oven built. My plan is to do markets, I want to be able to load the oven onto the back of a trailer. I would like advice on what to do next!!! i am unsure about insulation because i dont know if it is ok to use fiberclass/rockwool also should i use re-bar cast in the dome or will this lead to cracks when the iron expands??
        Now, that made me smile! If thats your cart, use "LEGO", blocks to build your oven.

        Comment


        • #5
          Re: portable oven

          I personally think that your cart will be fine with a small oven on it IF you build it correctly. As already stated fiberglass won't work, but Rockwool is fine. That said I would not use rockwool in your situation. Here's how I would proceed:

          1. Built a solid metal platform on top of your frame work. Roof decking would be great if you can find it, but something along the lines of 16 gauge mild steel would probably work too.

          2. Cast a 6" layer of 6:1 perlcrete on top of the metal.

          3. Build a firebrick cooking floor.

          4. Cast your oven using a commercial castable refractory and stainless needles for reinforcement. No rebar!

          5. Build a simple square enclosure right around the framing you already have. Sheet metal of some sort of backer board would be ideal.

          6. Fill the entire enclosure with 12:1 perlcrete around the oven. This will insulate but also lock the oven in place. That way when you tilt that cart to move it the oven will not be able to shift.

          7. Put a roof on the enclosure.

          Comment


          • #6
            Re: portable oven

            This would have to be a small oven. My mobile is 21" in diam and weighs around 170kgs. Don't know what your stand base dimensions are but mine are 910 x 910 mm. I think you may need some diagonal bracing on the stand to eliminate movement sideways.
            Kindled with zeal and fired with passion.

            Comment


            • #7
              Re: portable oven

              apologies chip, ceramic blanket is called fiberglass/rockwool where I come from. Thanks Shuboyje but what do you mean by roof decking? corrugated sheets is it?? David the base is 36''x36''

              Comment


              • #8
                Re: portable oven

                Originally posted by cobpaul View Post
                apologies chip, ceramic blanket is called fiberglass/rockwool where I come from. Thanks Shuboyje but what do you mean by roof decking? corrugated sheets is it?? David the base is 36''x36''
                Ok, same size as mine, it might be doable.
                Kindled with zeal and fired with passion.

                Comment


                • #9
                  Re: portable oven

                  Hi Cobpaul,

                  Please check again before you buy, many people mistakenly think fiberglass, rockwool and ceramic blankets are all the same, they are not!

                  Comment


                  • #10
                    Re: portable oven

                    I'm with the majority here...that stand looks scary to me. Looks like it would tip back potentially. But then again, I'm no engineer.

                    Bill

                    Comment


                    • #11
                      Re: portable oven

                      I agree. The drawbar on my trailer has gone skywards a couple of times. Fortunately it is chained into the trailer and no harm done, but this is a problem for single axles trailers with heavy loads over the axle. The more so the higher you go.
                      Kindled with zeal and fired with passion.

                      Comment


                      • #12
                        Re: portable oven

                        yes!! a third detachable pole with a wheel on the end for when im moving it about. The fulcram is directly over the axle. but i plan to adapt my trailer so i can secure the cart to it for transport and loading/off loading with a small winch, without fear of it going skyward. it will be next week before i get to the builders yard to get the rest of the stuff. also would i get away with using marine ply instead of sheet metal for underneath the 6'' perlcrete base?

                        Comment


                        • #13
                          Re: portable oven

                          Take your pick. The sheet metal will eventually rust, the marine ply will eventually rot. Heat and moisture will hasten both. Cement sheeting might be a better option but it would have to be well supported and thick enough.
                          Kindled with zeal and fired with passion.

                          Comment


                          • #14
                            Re: portable oven

                            cool ill go with the ply cause i have some.... so ill post more photos next week when i have the base poured thanks Dave

                            Comment


                            • #15
                              Re: portable oven

                              I am building a frame on the trailer to keep the cart in place and secure. obviously i will be tying it down with heavy-duty rachet straps also.

                              Comment

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