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Old 02-01-2013, 06:06 PM
PsychDoc's Avatar
Join Date: Dec 2012
Location: East of San Diego
Posts: 52
Default Re: Rocket pot oven

Scotpunk, I would be happy to provide all the information tips and things i would do differently. Ultimate success is but a dream
*** warning***
Tred lightly as you traverse the tasty trail. Not everyone is completely convinced of this unconventional method. If you have any latent daddy issues you may consider a moderate course of psychodynamic therapy. I can provide a referral if you would like.
However... If you have good ego strength, a pioneers spirit, thick skin, and the ability to color outside the lines then stay tuned.

It sounds like you have the general idea but I will attempt to fill in some of the detail.
The rocket stove does fire under the brick. There is a "deflector" designed to separate the bottom of the bricks from a direct blast and hopefully provide a more uniform heat. I used a flower pot saucer. I think brick may be better in that place since you could be assured of its ability to last long term. Also my thoughts of being able to make reapers in the burn chamber by removing the dome needs some more thought or more assurance that repairs will be unnecessary.
The cooking surface is resting on a cheap pizza pan. It warps slightly when heated. The exhausts are full circle around the cook surface, it sort of 'floats' in the stream of hot exhaust. I believe that with some skillful layout, the entire cook surface and heat deflector system can be made with fire brick.
The flower pot dome mates with a saucer of the same diameter. Lip to lip so to speak. I gave the rim a flat with the angle grinder to help them mate better. I might ditch the saucer in the future. A ring if firebrick splits would be better i think.
The whole thing has a thin layer of vermiculite concrete. I experimented with a couple layers of foil and found a real boost with just a little insulation. If you have the room for a couple inches of pearlvermicucrete it helps a bunch.
And no, I'm not concerned about my brick work. I figure at this point I'm a well skilled mason and might change careers. But seriously... The bricks get warm but not hot. I think the rocket stove could be built from more durable material, again maybe fire brick or cast iron would be great. I do have a layer of insulation between the rocket and the bricks. I would make the rocket stove ? Taller ? Longer? It's 6" diameter which may be a bit to large but I thought 4" was a bit small. If you imagine the rocket as an "L" shape you may choose to make the bottom leg longer. It would give you a longer burn chamber and better chance to consume the smoke fuel.
Lastly your pot. I used a cheap Mexican pot from Home Depot. 16" it cost about eight bucks. It seems to be holding up well and it was fairly thick. That was the largest pot that I thought was suitable at HD. Now then, if you are so inclined, planter Paradise in el cajon off chase is freaking awesome. You could get a larger, better, pot.
If you care to send me a PM and we can chat more.
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Old 01-06-2014, 05:09 PM
Join Date: Feb 2010
Location: London
Posts: 1
Default Re: Rocket pot oven

Is there any more news on this idea?
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Old 01-20-2014, 08:33 AM
PsychDoc's Avatar
Join Date: Dec 2012
Location: East of San Diego
Posts: 52
Default Re: Rocket pot oven

It has been quite some time since reporting on this idea. It was always an experiment with an intentionally short lifespan. However good information, I believe, was gleaned.
One of the amazing things was the performance of the clay pot. It was easy to modify and endured the heat like a champ.
The inner heat chamber/chimney however did not. I underestimated the destructive nature of the intense heat and wind racing through chamber, the cheap hvac tubes I used eroded quickly. As they did the heat loss the the structure brought it to the place where efficiency suffered.
But, when it was working, it worked well. Brought it up to temp, closed the upper chimney and made wonderful pizza. And a few other breads. Family and friends all enjoyed it.
So the big question might be, would you do it again? Yes and no
With some modification this design could be great, despite what the nay sayers say. The fire box and primary heat chamber need to be more substantial. Perhaps all brick. And that theme carries right up to the cooking surface.
I used thin cheap materials, for speed and thrift. A bit more time and care could produce, I believe, a product that would make a great little oven that would last for years.
Oh, it was too small, not because there was no room to cook, but the proportionally small door was hard to navigate
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Old 01-20-2014, 01:57 PM
Mitchamus's Avatar
Join Date: Aug 2008
Location: Sydney & Snowy Mountains
Posts: 388
Default Re: Rocket pot oven

Just stumbled onto this thread - a great read - thanks for posting.

I have a keen interest in rocket stoves - and one of the things i love about them is that everyone is different and really - the premise of building one is to try something different and share your results.

I have seen a video of a Old french bakery oven fired with a rocket stove. But I'm not sure if it's an intentional rocket stove - or if they just used to build the firebox that way a long time before anyone even thought of a rocket stove.

anyway - in the video, the riser exits on the very edge of the stove so that the flames lick up the dome of the oven, rather than going around the floor. Not sure how this would go for pizza - just sharing the idea.

I'll see if I can find the video and post a link

anyways - well done. loved reading this.
My 2nd Build:

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Last edited by Mitchamus; 01-20-2014 at 02:04 PM. Reason: typo
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Old 01-20-2014, 08:38 PM
PsychDoc's Avatar
Join Date: Dec 2012
Location: East of San Diego
Posts: 52
Default Re: Rocket pot oven

Thanks for the encouraging words Mitch, may I call you Mitch?

That one modification, ie heat entering the back of the dome and up the flue in the fount, would have made the build much more simple and likely worked just as well. Then again heating the floor...

Well thanks, it was fun to do and write about.

And for what it's worth I'm considering a modular as a next step. At some point I have to consider my time...
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