Instructables

Building A Rocket Stove For The Cabin

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Picture of Building A Rocket Stove For The Cabin
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FPS combines my passion for hunting and wildlife conservation with the overall need for self sufficiency.
 
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Step 1: Here are the basic materials for our rocket stove.

Picture of Here are the basic materials for our rocket stove.

Step 2: To start, we must locate and mark the bottom of the hole in the trash can for the 6" stove pipe.

Picture of To start, we must locate and mark the bottom of the hole in the trash can for the 6

Step 3: The lid from a #10 tin can makes the perfect template to trace the hole.

Picture of The lid from a #10 tin can makes the perfect template to trace the hole.

Step 4: The plastic lid is flexible enough to lay on the curved surface of the trash can. Using a Sharpie trace the outline.

Picture of The plastic lid is flexible enough to lay on the curved surface of the trash can. Using a Sharpie trace the outline.

Step 5: Now we're ready to cut the hole.

Picture of Now we're ready to cut the hole.

Step 6: Using a pair of tin snips, cut a rough hole making sure to stay at least 1/2" away from the edge of the black line.

Picture of Using a pair of tin snips, cut a rough hole making sure to stay at least 1/2

Step 7: The edges are rough and sharp.

Picture of The edges are rough and sharp.

Step 8: Using the tin snips again, proceed to make thin cuts in the metal. We will be folding these tabs into the can.

Picture of Using the tin snips again, proceed to make thin cuts in the metal. We will be folding these tabs into the can.

Step 9: Another view of the relief cuts.

Picture of Another view of the relief cuts.

Step 10: There are many ways to cut a hole in sheet metal but if you only have limited tools this method is more than acceptable and the hole looks "finished".

Picture of There are many ways to cut a hole in sheet metal but if you only have limited tools this method is more than acceptable and the hole looks

Step 11: Insert the 6" elbow into the hole. Place the section of stove pipe onto the elbow and mark it about 1" below the rim of the trash can.

Picture of Insert the 6

Step 12: Mark a dotted line to guide your cut.

Picture of Mark a dotted line to guide your cut.

Step 13: Secure a 2x4 into your bench vise and insert the stove pipe through it.

Picture of Secure a 2x4 into your bench vise and insert the stove pipe through it.

Step 14: Using a cut-off wheel, start connecting the dots. Rotate the pipe around and reclamp until the cut is complete.

Picture of Using a cut-off wheel, start connecting the dots. Rotate the pipe around and reclamp until the cut is complete.

Step 15: We will be using both sections of pipe. Hand file to break the sharp edges.

Picture of We will be using both sections of pipe. Hand file to break the sharp edges.

Step 16: A rubber mallet may be needed to persuade the two pieces to come together.

Picture of A rubber mallet may be needed to persuade the two pieces to come together.

Step 17: Check for fit and proper height.

Picture of Check for fit and proper height.

Step 18: Self tapping screws will secure the two pieces together.

Picture of Self tapping screws will secure the two pieces together.

Step 19: Attach the short section of pipe to the elbow.

Picture of Attach the short section of pipe to the elbow.

Step 20: Starting the double wall chimney... place a trim ring on first.

Picture of Starting the double wall chimney... place a trim ring on first.

Step 21: A good view of the trim ring inverted and slid into position. My dog is super excited about this project.

Picture of A good view of the trim ring inverted and slid into position. My dog is super excited about this project.

Step 22: The 8" pipe should be cut a couple inches below the rim of the 6" pipe, this will leave room to install the second trim ring.

Picture of The 8

Step 23: Checking again for fit. Notice the 1/2" metal plate under the elbow, this keeps the fire chamber off the bottom of the can.

Picture of Checking again for fit. Notice the 1/2

Step 24: Four pieces of threaded rod will secure the top of the chimney. Measure from the 6" pipe to the edges of the can and add 1".

Picture of Four pieces of threaded rod will secure the top of the chimney. Measure from the 6

Step 25: Measure, mark and drill the can for threaded rod installation.

Picture of Measure, mark and drill the can for threaded rod installation.

Step 26: Now mark the hole location in the 8" stove pipe.

Picture of Now mark the hole location in the 8

Step 27: All 4 rods will touch the 6" chimney to secure it. Adjust the nuts and tighten on the inside and outside of the trash can.

Picture of All 4 rods will touch the 6

Step 28: Another view of securing the chimney, the interior and exterior nuts can be seen.

Picture of Another view of securing the chimney, the interior and exterior nuts can be seen.

Step 29: A piece of sheet metal will be used for the wood fuel to lay on. Measure the widest point of the stove pipe.

Picture of A piece of sheet metal will be used for the wood fuel to lay on. Measure the widest point of the stove pipe.
Notice the two screws inside that are used to hold the stove pipe to the elbow. The sheet metal can rest on those screws perfectly.

Step 30: Slide the sheet metal in as far as it will go.

Picture of Slide the sheet metal in as far as it will go.
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Step 31: This view shows the sheet metal slid into place. Once the sticks are installed, the fire chamber will only burn the tips as super heated air flows in from under the wood and a strong draft is created in the combustion chamber.

Picture of This view shows the sheet metal slid into place. Once the sticks are installed, the fire chamber will only burn the tips as super heated air flows in from under the wood and a strong draft is created in the combustion chamber.

Step 32: Pour the vermiculite into the double wall of the chimney. The Mini Mouse cup is optional.

Picture of Pour the vermiculite into the double wall of the chimney. The Mini Mouse cup is optional.
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Step 33: Once the double walled chimney is full put the second trim ring on and pour the rest of the vermiculite around the combustion chamber.

Picture of Once the double walled chimney is full put the second trim ring on and pour the rest of the vermiculite around the combustion chamber.

Step 34: This is an old grate I had laying around and will be perfect for the rocket stove top.

Picture of This is an old grate I had laying around and will be perfect for the rocket stove top.

Step 35: Ready for the first test burn. The great thing about a rocket stove is that it needs very little fuel to operate efficiently.

Picture of Ready for the first test burn. The great thing about a rocket stove is that it needs very little fuel to operate efficiently.

Step 36: Push the sticks all the way into the combustion chamber. Newspaper, leaves or dry grass can be used to lite the stove.

Picture of Push the sticks all the way into the combustion chamber. Newspaper, leaves or dry grass can be used to lite the stove.

Step 37: At first there will be smoke. Once the stove heats up not only will the sticks burn but so will the smoke. Smoke is nothing more than unused energy.

Picture of At first there will be smoke. Once the stove heats up not only will the sticks burn but so will the smoke. Smoke is nothing more than unused energy.
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The vermiculite is a great insulator and will help keep the fire so hot that even the smoke will be consumed and turned into heat.

Step 38: A view inside the combustion chamber. The stove is almost up to operating temperature, very little smoke can be seen.

Picture of A view inside the combustion chamber. The stove is almost up to operating temperature, very little smoke can be seen.

Step 39: Complete combustion in under 5 minutes. No visible signs of smoke and an intense fire is roaring in the combustion chamber.

Picture of Complete combustion in under 5 minutes. No visible signs of smoke and an intense fire is roaring in the combustion chamber.
The term "rocket stove" is used because the draft is so intense in the combustion chamber that the roaring fire sounds like a rocket taking off.

Time to build a couple quick accessories before we take the stove out for field trials.

Step 40: This is an old ash bucket shovel that I had in the garage.

Picture of This is an old ash bucket shovel that I had in the garage.
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By cutting wings in the end of the shovel and bending it over I created a reverse scoop for pulling the ashes out of the combustion chamber.

Step 41: Two pictures of the scoop in action.

Picture of Two pictures of the scoop in action.
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Step 42: Next we will make an adjustable metal skirt which will aid in heating the water kettle.

Picture of Next we will make an adjustable metal skirt which will aid in heating the water kettle.
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Cut the tops and bottoms out of three #10 cans and split down the middle.
These pieces will make an adjustable skirt that can wrap around just about any sized container.
The skirts force the hot air to stay close to the sides of the container and is another form of insulation.

Step 43: The stove is not in operation. These pics are to show the adjustable skirt on the water kettle.

Picture of The stove is not in operation. These pics are to show the adjustable skirt on the water kettle.
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Step 44: Keep the lid on the trash can when not in use and everything stays high and dry.

Picture of Keep the lid on the trash can when not in use and everything stays high and dry.

Step 45: At the cabin and now installing the rocket stove pad, it's a very simple sandstone slab on bricks.

Picture of At the cabin and now installing the rocket stove pad, it's a very simple sandstone slab on bricks.
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Step 46: Rocket stove set-up and ready. The stove is now at waist level, perfect for cooking or canning.

Picture of Rocket stove set-up and ready. The stove is now at waist level, perfect for cooking or canning.

Step 47: Firing up the stove and filling the water kettle.

Picture of Firing up the stove and filling the water kettle.
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Step 48: 1 1/2 gallons of water.... full boil in under 40 minutes.

Picture of 1 1/2 gallons of water.... full boil in under 40 minutes.
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Step 49: Two more pics of the water kettle boiling. Notice the lack of wood smoke.

Picture of Two more pics of the water kettle boiling. Notice the lack of wood smoke.
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Step 50: Before cooking on the stove I needed to burn the paint off the metal grate.

Picture of Before cooking on the stove I needed to burn the paint off the metal grate.

Step 51: Burgers and hotdogs on a broiler pan. This is needed to keep the grease from dripping into the trash can.

Picture of Burgers and hotdogs on a broiler pan. This is needed to keep the grease from dripping into the trash can.
Shadow says, "Anything that hits the ground is mine."

Step 52: When the burgers were almost done I placed them on a cast iron grate over the stove for flavor.

Picture of When the burgers were almost done I placed them on a cast iron grate over the stove for flavor.
Mmmmm.... charbroiled  :)

Step 53: It is now the following morning and time for breakfast.... bacon and eggs.

Picture of It is now the following morning and time for breakfast.... bacon and eggs.
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Step 54: Breakfast is served..... Thank You.

Picture of Breakfast is served..... Thank You.
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BobdeNassty6 months ago
Excellent instructions.
Bevwilder7 months ago
That has got to be one of the best intro tables I have ever seen. I could almost put it together from the pictures alone. The step by step instructions with pics at every step make a project I would not be afraid to try. Thanks.
lucek1 year ago
Interesting but not as portable as I'd like. IE kinda hard to carry. I guess I'll just have to be inefficient and cook over an open fire when in the bush.
AmyCat59 lucek9 months ago
There are much smaller versions; look for "Hobo stoves" or other Rocket Stove designs on Instructables. You can make one with two soup-cans (one larger, one small enough to fit inside the big one), a little tomato-paste can for the perpendicular combustion-chamber part, and a final can to cut up for the other pieces of metal you use for the rest.
If you want to buy a ready-made one, there's even a backpacker's version which has a plug-in USB power outlet to charge your smart-phone or iPod or whatever...
Tim Temple1 year ago
The big source of zinc is the grate. The later pictures show the grate covered in zinc oxide from overheating. You would need 3 to 4 aspirin for your headache if you cook for a while over that.
The truly dangerous thing to do would be to use a chrome grill from an old car. The vanadium can harm you.

I almost built one of those things, but I realized I wouldn't be doing any community cooking even in bad times.
foodplotsurvival (author)  Tim Temple1 year ago
No problems with the grate so far but I will check into it further and replace if necessary. Thanks!
royalspin1 year ago
This is a great concept except for one glaring health hazard. This is a galvanized can ,meaning its going to flash off large amounts of zinc when you fire it up .So now your not only inhaling it,your eating it as well.Plus now that the zinc coating has been burned off ,you no longer have any form of rust prevention.especially with as thin as these cans can be. Just use a different can like an oil drum instead -which is steel and way safer.By the way the build looked excellent .I'm just trying to save people from zinc poisoning.If you have children this important.One other point if I may is the paint should be burned off away from children as well as it contains some nasty stuff nobody should really be breathing in.
foodplotsurvival (author)  royalspin1 year ago
The galvanized metal can does not get hot. It stays cool enough to lay your hand on. The fire is in the black stove pipe.... please reread the instructable. Thanks.
twighahn1 year ago
i would want more room for hands in the bottom chamber
rohit445241 year ago
awesome creativity
I don't get the joke in the title picture....
foodplotsurvival (author)  Foo_Plinger1 year ago
Sorry, no joke. The draft is so intense in the combustion chamber that the fire roars. It sounds like a rocket taking off. Google rocket stoves... there are many good designs. Thanks
But it looks like an internet meme....perhaps a font or style change is in order?
It truly is a sad statement on the world when someone sees an image in motivational poster style and assumes it's a joke.

The truth is that motivational posters in this style predate the internet itself.
So this is a motivational rocket stove? Excellent.
Now I am confused. I 'Googled' Internet meme and couldn't find any that looked like a rocket stove. Plus - they had all kinds of fonts and styles. Perhaps a non-meme font is in order? Maybe like the sans serif fonts but we can call them sans meme? Oh! And if something looks like an internet meme but isn't, what do Internet memes look like before they become... Oh never mind, my head hurts.
Allow me to explain. Due to the "style" per-say of the display image (the image surrounded in black with text below it), Mr.Floo-Plinger was lead to believe that by the way that the display image was formated, similar to the formating of other images, usually displaying a picture with a pun or otherwise humerous phrase beneath it, all surrounded in a black background, that, the display image had a joke in the title below it. Therefore he, confused, posted his original comment which then, through a series of events to numerous to even begin exploring, lead me to post this comment in response in an attempt to conclude any confusion or otherwise misinterpretation.
So in other words, the very act of observing an internet meme, accurately or otherwise, has the potential to affect the evolution of said meme - or even create a new one! Interesting... almost like a double-meme/slit experiment with a meme being everywhere and nowhere at once. I suppose that would explain why some may 'get it' and some may not, even if there was nothing to 'get' in the first place. My life feels so empty now... Well, except for pictures of cats, that's the one thing we got...
Toga_Dan1 year ago
http://4.bp.blogspot.com/_Tsl9yZzhzE8/TSim1cHfRdI/AAAAAAAABXk/dc4M4PWT2Ho/s1600/Rocket+Stove+full+diagram.jpg

Is that essentially like what you've built? I can often "See" a design better with a simple line drawing.
jexter1 year ago
Great job! Also, when not in use you could slide out the sheet metal shelf and use the plastic can lid to cover the bottom 6" pipe and keep the mice from building a cozy nest in there.
foodplotsurvival (author)  jexter1 year ago
Didn't even think about that. Thanks!
how long would a stove like this last if you built one? since its made from that thin metal will it get hot enough to start burning through after a while or what will help it last longer that you could do?

How many hours a day could it be used, like if you used it 8hr a day every day or something for a week while camping or a month just to keep it hot and going to use it anytime or for lots of use would it fall apart quick?
foodplotsurvival (author)  surpcrepair1 year ago
Hello, this stove would not be practical for all day use. It operates on very little wood (sticks & twigs) and the wood must be slid into the combustion chamber as the tips burn, every 5 to 10 minutes.

Thicker stove pipe will last longer but it will also rob the combustion chamber of heat. The mass of the thicker steel will have a cooling effect and in turn may keep the smoke from combusting easily.

Thank you for your questions.
So, theoretically, at least, if you used a material that has almost zero heat capacity you could get maximum efficiency out of one of these?
foodplotsurvival (author)  mettaurlover1 year ago
That's an interesting question. Maybe a ceramic lined combustion chamber?
So, theoretically, at least, if you used a material that has almost zero heat capacity you could get maximum efficiency out of one of these?
heathbar641 year ago
I have not seen before the double wall pipe. What is the purpose of that?
the double wall pipe is to create an insulation chamber; when the insulation chamber heats up it crates more draft sucking more oxygen through the heating tube and making a hotter fire. The trash can in this Instructable is not needed (except for stabilizing the combustion chamber). For a rocket stove just to be used for cooking you only need the insulated combustion chamber and some space for the combusted gasses and flames to flow out under your heating element. The trash can would be used if the top was closed (if you were making a mass heater or a hot plate style rocket stove) and sealed but it would have an exhaust near the bottom of the trash can on one side; in this situation the heat acts like a waterfall over the top of the combustion chamber with the edge of the waterfall being the apex of the temperature.
benfarhner1 year ago
This is a great instructable, well made and very clear. I love the idea and I'd love to build one someday!
rimar20001 year ago
What a good work!
foodplotsurvival (author)  rimar20001 year ago
Compliments from a veteran instructables creator.... Thanks!
The term "jet stove" reminds me that my salamander stove "roars" strongly when I feed it more than necessary. It seems a rocket raising!
Henge1 year ago
Awesome setup, it's inspiring me to build another. I made a similar one last spring for Maple Syrup boiling and charged it with a blower motor. I used an old propane cylinder instead of the elbow and a larger feeding tube and set the entire thing into a 55 gallon barrel. Sadly (and possibly obviously) the fire burned way to hot (the stove pipe on the top was red hot!) and after 16 hours began to crumble apart. I may build another one using fire brick in a octagonal shape when I figure out a permanent place for it.

I digress, this is a beautiful (and efficient) setup and I applaud you.
foodplotsurvival (author)  Henge1 year ago
Thank you very much... I'm planning on taking pictures of all my builds from now on.
BTW, I'm loving the profile pic! Where do you insert the magazine? :)
Too bad I live in an apartment, I enjoyed your instructable. Maybe someday when I have my own house.
I'm sure the landlord won't mind :)
Rocket stoves are great!! Your instructable is really well documented. I like that you use old coffee cans as a heat shield.
Thank you for the kind words.
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