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Post by greenveg on Jan 26, 2013 7:33:56 GMT -8
Hello my fellow rocketeers! This is my first post on this forum just 5 minutes after registration. Have been a lurker for a while though...
I have built smaller portable rocket stoves before with success. but now I need and want to build one with a pizza oven.
I did a simple mockup of the plans. Please give me your thoughts! They would make me happy, and hopefully a better oven. The most important measurements should be there...
EDIT: It's the widths, lengths and that stuff I need you thoughts on.
Aside from what is in the picture some kind of diffuser plate and other details like a peter channel and stuff will be used as well. I will probalby also build a small insulated door at the the wood-end of the burn tunnel, coming in from the side. For easy cleaning and experiments with air intake.
Thanks from Johannes, working at the guesthouse DoneRight in Cambodia.
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Post by Deleted on Jan 26, 2013 11:10:05 GMT -8
Your burn tunnel should be 15 cm too. 40 cm is a bit long. You could make a cutout for the feed tube.
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Post by Donkey on Jan 26, 2013 15:23:05 GMT -8
It's good to have a lot of thermal mass inside the dome of the oven, then insulate around that. It'll heat up and then keep that heat for a good long long time.
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Post by greenveg on Feb 1, 2013 19:02:43 GMT -8
karl: Yes, you are probably right about the burn tunnel diameter. However, I am pretty sure I can get away with the long burn tunnel.
I bought Ernies&Ericas plans for a 6" RMH and realised it was very similar to my design, but with an even longer burn tunnel and a heat riser height of a rockety 119cm. So I might go with adding another another ten centimeters to the heat riserand keeping the burn tunnel at 40cm. What do you think?
A cutout might not be a bad idea either. But i do makes the design more complicated. This will be built out of steel and perlite and I have learnt the hard way that in Cambodia, simpler is better.
Donkey: That sounds like a good idea. Do you have any experience with making heat resistant cement? I also have acess to pretty high quality clay that I can mix with perlite. Gotta do some more reading about this!
Thanks for the answers!
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Post by Deleted on Feb 2, 2013 2:39:31 GMT -8
A cutout might not be a bad idea either. But i do makes the design more complicated. This will be built out of steel and perlite and I have learnt the hard way that in Cambodia, simpler is better. It is not complicatet. The dimenions of your stove are similar to the dimensions of mine. donkey32.proboards.com/index.cgi?board=cooking&action=display&thread=508Many hundreds of pizzas have been made with it.
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Post by Donkey on Feb 3, 2013 20:20:20 GMT -8
Umm.. What would the cement be for? All of the works can be made from found/dug natural materials. As long as you have the clay, the rest should be easy. The thermal mass mix can be made with clay rich soil an a whole lot of sand. You would need to experiment with your soils, find out how much sand you can get into it and have it still hang together. Around here, with my clay soils, regular ol' building cob is a mix of about 1 part soil to 1 part sand. "Oven mix" for me is around 4 or 5 parts sand to 1 part soil. Remember, my dirt and yours will be different. You can NOT just run out and use my recipe unless you are a VERY lucky person. You'll need to do some tests.
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Post by greenveg on Feb 5, 2013 9:18:32 GMT -8
Cement would be for the dome. My original plan was to have a maybe 3 inch layer of cement/sand and then another layer if perlite/cement. I have asked around at some other places in town that have some sort of wood-fired ovens. Usually brick and cement. We even have a couple of places with the big "standard" pizza ovens. The use cement with no problems. I know that it is not optimal, but redoing it every other season is not a very big deal. And I need to get this done. I might do it with cement and then replace it with clay later. The clay I can get (from literally beside the road) is white and very clean. Not mud. Clay. It is very dry and hard. I did a fair bit of experimenting with it trying to make my own insulative bricks (firebricks) with clay, water and sawdust. But I couldn't get it fired properly myself without a kiln. I did however try a technique called pit-firing. It didn't work out... Pity, I hade like 16 bricks with different ratios that went to shit... So I just ordered perlite from Bangkok. Got a 100 liter bag coming any day now... In the days coming and can and will put up some more photos of the design as it is now and clay. Maybe some of my failed brick experiment as well
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Post by Donkey on Feb 6, 2013 11:04:34 GMT -8
Whatever you do, don't mix cement with the earth.. What you get is crappy cement. You tend to loose the best characteristics of BOTH materials.. Either build it with cement, or build it with earth. Best choice in my humble opinion? Build it with earth, forget the cement. Get a book. www.handprintpress.com/bookstore/build-your-own-earth-oven/
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Post by maniac424 on Apr 27, 2013 23:09:06 GMT -8
karl are you saying the horizontal tunnel should be 15 cm long, or 15 cm tall?
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Post by Deleted on Apr 28, 2013 3:16:25 GMT -8
karl are you saying the horizontal tunnel should be 15 cm long, or 15 cm tall? The tunnel should be about as long as its diameter.
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docbb
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Post by docbb on May 1, 2013 21:50:19 GMT -8
Hello my fellow rocketeers! I have built smaller portable rocket stoves before with success. but now I need and want to build one with a pizza oven. here is a blog in Japanese (use google chrome and get an instant translation) click on this one This one in french still in french(pdf)
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docbb
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Post by docbb on May 11, 2013 3:40:19 GMT -8
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