@ 2:43 - I see fluctuations / oscillating fire. I built simmilar oven with a second working lid/door with opening for fresh air intake. when fire is stronger and outer / working door closed we experience the same fluctuations. any idea how to avoid it ?
the double chamber design with the fire burn in the back and the chimney feed in the front chamber is just like the wood stove in my house and it works great.
We built a similar oven, but used an aluminum double-walled stove pipe we purchased. This was a mistake, since with the double burn the chimney gets REALLY hot and we actually melted the inside wall of the chimney--it dripped onto the floor and immediately hardened. Now we're waiting for the outer wall to burn and we'll replace with a 6" steel pipe... Thanks for the great video.
I think I'd be inclined to just make a rocket cob oven instead, so that I could have the fire chamber lower and exhaust that clean flame into the top.
Either that or just set the whole design down a foot and a half and build a second chamber on top and have a double capacity oven using the same amount of wood.
Still much nicer to the eye than a smokey black cob smudgepot.
@jotribalreign In colder climates, you'll want more insulation and probably a bit more mass. Insulation layers in cob ovens are discussed in the YouTube vid entitled "Building an Horno (Clay Oven) - Adding Insulation Layers".
This is a really good idea. I couldn't really gather how it worked by listening to the description, although with some thought, I think the second dome is higher than the first, and the smoke first goes up into the foremost dome, and then circles around, and goes into the higher, second dome to retain heat, and then exit out of the chimney. I Power Point Diagram of theory, would be really helpful! Thanks!
@muserwood@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel below the oven. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
hi. i am building an oven in my garden and i would like to know how you do get the rocket. could you send me a plan for this to my email adres? thank you.
I was just designing a rocket mass pizza oven. I was thinking that if you just wanted to bake for a short time (with less fuel ) and pizza cob oven built over the rocket heat exchanger would be just the thing. Am I right ?Or wrong ?
@muserwood@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel below the oven. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
I'm just not clear about the schematics of this oven. I hear you say "two chambers" and "lip", but I can't picture in my mind what those really mean. Could we get an internal drawing?
@Crunchy68 I think it must be shaped a little like the outline of a butt on the inside (with a cheek in the front of the oven and a cheek in back). The fire burns at the back and heat rises into one of the "cheeks". The cheek has to completely fill up with heat until it finally spills over (or in this case, under) the "buttcrack" and into the second cheek, which is connected to the stovepipe.
@contentandthankful Start with roasted vegis while oven is heating, then pizza with your best pals (topped with roasted vegis), move on to a Florentine steak after the beer and wine settles in (of course served with italian potatos with chopped rosemary and garlic), throw in a meatloaf for next weeks work lunch (if you have a job), and top off the night with strawberry shortcake. Not quite 8 hours, but I'm sure I could throuw in a loaf of bread for your work sandwiches. Hit it while it's hot.
I would also like to see the inside to get an idea of what the double chamber looks like. Also, if you build a rack on top of the stove pipe you can "capture" some of that wasted heat off the second burn. We use our rocket stove to heat water, soups and cook all sorts of things off the top of the stove pipe.
Thanks for the vid Paul! Another great permie creation!
If you were really keen you could put a hot plate or grill plate on top of that and have a bbq on top yes? You could either build the oven on the ground so you can reach the flame, or build some sort of deck I guess.
Neat! I can't help but think, though, that the flames shooting out the top represent wasted heat. I wonder if there's a good way to cycle them through the oven one more time?
@paulwheaton12 So what would happen if you built a cob oven like this with a second cob chamber around the rocket exhaust pipe? Wouldn't you get two ovens heated for the price of one?
I can't really think of needing multiple ovens going at once unless I was the village baker, but it seems like a thought, anyway.
@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there.
@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
@jesusabdullah well we could cook meats and marshmellows over the flame until a better design comes along with more chambers and baffles to make a better burn. still takes time to heat a ton of cob up though, ya know?
@benjamminSon well .... uh ... yes .... but youtube doesn't let you edit videos and i don't see a way to upload something here. if you ask this out at permies i know i can upload at least one more pic and i can ask ernie and erica if they have anything more.
I love how relaxed Ernie is. We should all aim to be this relaxed!
bulleuston76 4 weeks ago
could you use a cob/rocket oven like this to heat a radiant heating system?
erikofthenorse 1 month ago
@ 2:43 - I see fluctuations / oscillating fire. I built simmilar oven with a second working lid/door with opening for fresh air intake. when fire is stronger and outer / working door closed we experience the same fluctuations. any idea how to avoid it ?
Cheers
allilinin 1 month ago
I great video, nice design! I have to add that a rocket cob oven its for pre heat it for makes it smoke less
ingesumadre 1 month ago
the double chamber design with the fire burn in the back and the chimney feed in the front chamber is just like the wood stove in my house and it works great.
dtp5150 1 month ago
hey, nice vid, thanks.
funny coincidence at 5:25, you say
"any time you have smoke you have wasted fuel"
then you puff smoke outa your pipe,
I like that.
avgurim 2 months ago in playlist More videos from paulwheaton12
We built a similar oven, but used an aluminum double-walled stove pipe we purchased. This was a mistake, since with the double burn the chimney gets REALLY hot and we actually melted the inside wall of the chimney--it dripped onto the floor and immediately hardened. Now we're waiting for the outer wall to burn and we'll replace with a 6" steel pipe... Thanks for the great video.
shamboha 2 months ago
2:19 - neat penis handler
tymono19 2 months ago in playlist permaculture and food forest
@tymono19 i know. leaves it there for minutes, and then puts it BACK! it even looks uncomfortable to bend over, but he doesn't move it!!!! LOL
nazilampshade 1 month ago
This has been flagged as spam show
Where can I go to see how to build this?
Brie217 3 months ago
ernie and kiko are buds? did this guy smoke them?
koviack 3 months ago
OUTSTANDING Demo man!!!! I'm quit impressed!
Byrds1000 4 months ago
Ernie is awesome! Im really inspired to start making some of the things he shows in the videos! Very clever!!!
timstah1971 4 months ago
I think I'd be inclined to just make a rocket cob oven instead, so that I could have the fire chamber lower and exhaust that clean flame into the top.
Either that or just set the whole design down a foot and a half and build a second chamber on top and have a double capacity oven using the same amount of wood.
Still much nicer to the eye than a smokey black cob smudgepot.
daw162 4 months ago
great door idea ill make something like that for the firing
JermsA320 4 months ago
what would happen if you...Oh you did that already, so which oven works best (Kilo wood vs 1000 BTU stored in oven to be used for baking?)
PS Rocket cob vs double chamber.
Peace jeff
kludge000 5 months ago in playlist More videos from paulwheaton12
How hot does the top flame get?
Lephrenic 7 months ago
How do these work on colder climates? Specifically, Alaska.
jotribalreign 8 months ago
@jotribalreign In colder climates, you'll want more insulation and probably a bit more mass. Insulation layers in cob ovens are discussed in the YouTube vid entitled "Building an Horno (Clay Oven) - Adding Insulation Layers".
yewberrypie 7 months ago
This is a really good idea. I couldn't really gather how it worked by listening to the description, although with some thought, I think the second dome is higher than the first, and the smoke first goes up into the foremost dome, and then circles around, and goes into the higher, second dome to retain heat, and then exit out of the chimney. I Power Point Diagram of theory, would be really helpful! Thanks!
themarkfellows2 8 months ago
@muserwood @paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel below the oven. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
NickRitar 8 months ago
...the same circumference as the stove pipe...
moonrox777 8 months ago
hey there nice wood!!! ;}
moonrox777 8 months ago
hi. i am building an oven in my garden and i would like to know how you do get the rocket. could you send me a plan for this to my email adres? thank you.
KENAN1TURK 8 months ago
@KENAN1TURK i think you will have better luck asking in the forums at permies.com
paulwheaton12 8 months ago
Isnt it a waste of heat to have that huge flame coming out?
T0bb5 8 months ago
Hey dude
Awesome video. I like how you have a cup in your hand pretty much the entire time.
Quick question about the chimney... does it release heat oncee its fired and ready for bread? Do you cover it?
cogfux 9 months ago
I was just designing a rocket mass pizza oven. I was thinking that if you just wanted to bake for a short time (with less fuel ) and pizza cob oven built over the rocket heat exchanger would be just the thing. Am I right ?Or wrong ?
muserwood 10 months ago
@muserwood @paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel below the oven. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
NickRitar 8 months ago
I'm just not clear about the schematics of this oven. I hear you say "two chambers" and "lip", but I can't picture in my mind what those really mean. Could we get an internal drawing?
Crunchy68 11 months ago
@Crunchy68 I think it must be shaped a little like the outline of a butt on the inside (with a cheek in the front of the oven and a cheek in back). The fire burns at the back and heat rises into one of the "cheeks". The cheek has to completely fill up with heat until it finally spills over (or in this case, under) the "buttcrack" and into the second cheek, which is connected to the stovepipe.
J0hnnyH3mps33d 9 months ago
Could I build one that includes a seperate fuel chamber (under neath) so that I don't have to worry about ash mixing in with food?
TechnomancerMorhion 11 months ago
how do i make one just like this?
gaitedD 11 months ago
The video is decent but that screen door of his brings back some early 80's childhood memories
dendog21 1 year ago
flat bread
swoldu01 1 year ago
just a question.. who is going to cook for 8 hours?!! lol
contentandthankful 1 year ago
@contentandthankful somebody who is having a party!
paulwheaton12 1 year ago 11
@contentandthankful Start with roasted vegis while oven is heating, then pizza with your best pals (topped with roasted vegis), move on to a Florentine steak after the beer and wine settles in (of course served with italian potatos with chopped rosemary and garlic), throw in a meatloaf for next weeks work lunch (if you have a job), and top off the night with strawberry shortcake. Not quite 8 hours, but I'm sure I could throuw in a loaf of bread for your work sandwiches. Hit it while it's hot.
brook61 6 months ago
This is very nice! Talk about improving a good oven and making it great!
wenrolland 1 year ago
Looks like a ton of flame and heat coming out of the top. You could probably cook on that or use it somehow.
Blackoutx86 1 year ago
What about creosote?
alienbaroque 1 year ago
@alienbaroque There is none, burn is to efficient.
Blackoutx86 1 year ago
I just can't help it, but this would make for an INTENSE double chamber cob bong! Singe your face off all for the perfect high.
bdmenne 1 year ago
man who pushes fire with handle of cane has back hands lol
Great video
calmingbrook 1 year ago
man who pushes fire with handle of cane has back hands lol
Great vid!
calmingbrook 1 year ago
Good work! Thanks for the vid!
I would also like to see the inside to get an idea of what the double chamber looks like. Also, if you build a rack on top of the stove pipe you can "capture" some of that wasted heat off the second burn. We use our rocket stove to heat water, soups and cook all sorts of things off the top of the stove pipe.
Thanks for the vid Paul! Another great permie creation!
beaudha 1 year ago
If you were really keen you could put a hot plate or grill plate on top of that and have a bbq on top yes? You could either build the oven on the ground so you can reach the flame, or build some sort of deck I guess.
CairnsFoodGarden 1 year ago
About how much wood is required to warm it up for those eight hours of use? Very nice work, by the way.
jeanqueuepublique 1 year ago
It's a big frog!
jdunk2145 1 year ago
Yay, people have been talking about this for years and finally someone bothered to make one!
opcn18 1 year ago
awesome
pranachimana 1 year ago
Neat! I can't help but think, though, that the flames shooting out the top represent wasted heat. I wonder if there's a good way to cycle them through the oven one more time?
jesusabdullah 1 year ago
@jesusabdullah that's what I was kinda thinking for the rocket oven idea
paulwheaton12 1 year ago
@paulwheaton12 So what would happen if you built a cob oven like this with a second cob chamber around the rocket exhaust pipe? Wouldn't you get two ovens heated for the price of one?
I can't really think of needing multiple ovens going at once unless I was the village baker, but it seems like a thought, anyway.
Crunchy68 10 months ago
@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there.
NickRitar 8 months ago
@paulwheaton12 I like the idea of the big slow fire inside the cooking area, rather than a rocket stove powered oven that would use a small intensely hot fire of stick fuel. The oven in the video is like a turbo oven, but I think we could learn from rocket mass heaters to rework the design to better utilise the heat generated in the re-burner section of the fire. Perhaps by drawing down further under the base of the oven and re-burning there. Thanks for the video
NickRitar 8 months ago
@jesusabdullah well we could cook meats and marshmellows over the flame until a better design comes along with more chambers and baffles to make a better burn. still takes time to heat a ton of cob up though, ya know?
aihlo 1 year ago
@jesusabdullah argreed. Looks amazing but looks like that heat could be used for heating water etc. - rather than just letting be wasted.
Still, amzing idea, and looks great
LJF 1 year ago
Ernie Wisner
Wood Heat Engineer
- funny and true at the same time
Already thinking of a way to fit The Double Chambered Cob Oven into my design
Thank you for this
iamamonsterrr 1 year ago
@iamamonsterrr I made up the part about "wood heat engineer" :)
paulwheaton12 1 year ago
Awesome. I like that design a lot. Can we get a different angle and maybe a picture inside?
benjamminSon 1 year ago
@benjamminSon well .... uh ... yes .... but youtube doesn't let you edit videos and i don't see a way to upload something here. if you ask this out at permies i know i can upload at least one more pic and i can ask ernie and erica if they have anything more.
paulwheaton12 1 year ago
@paulwheaton12 Cool I'll head over to permies...again :) Been seeing your posts on reddit and meaning to check out the permies site.
benjamminSon 1 year ago
That is very neat, and pretty amazing that it gets that hot from so little fuel. I like the clean burn, too.
MikeTheGardener 1 year ago
wow! gota build one of those my self back there where I came from. Thank you for sharing.
nedeljkomostar 1 year ago