Step 1: Tools & Materials
- a large diameter steel pipe with a wall thickness of 2-3mm
- one steel oil drum
- and one piece of steel round tube which can act to hold insulation around the combustion chamber (the center pipe)
Other than these materials you will also need a thick(2-3mm) piece of steel which can act as a lid for and maybe you will need additional scraps of steel.
Tools: this project can be done with just a hammer, drill and a grinder but we used a two welders(MIG & TIG), drill, plasma cutter, hammer and grinder.
Step 2: Cut Yourself a New Hole.
Step 3: Drain It.
Step 4: Cut Your Combustion Chamber.
Cut your pipe at a 45degree angle and weld the two pipes together to make an L bend.
Cut your length of pipe so that it is 60-70cm long at 90 degrees. Cut a square out of the pipe for feeding wood into it. Make a box out of sheet steel which fits cleanly onto the pipe and .weld it all together.
* the combustion chamber should have a shelf to sit the wood on allowing air to pass under the shelf and feed the burning wood. Only the tips of the wood should burn but there should be quite a bit of air flow so you don't want the shelf to extend into the combustion chamber but just to run for the length of the feeding tube.
Step 5: Insulation Divider.
Cut it to the same height of the combustion chamber and cut out a hole for the feeding tube to pass through. You don't need to weld the insulation chamber to the bottom of the oil drum but we did. However you can get it so that the insulation chamber keep the insulation contained and not flowing all over the inside of the barrel, and blocking the exhaust, do it that way.
Step 6: Exhaust.
Step 7: Add Insulation!
Step 8: On Making Friends and Staying Warm.
Chop some kindling sized pieces of wood and light a fire under them with some paper until they stay lit on their own. the stove may produce some smoke at first but once working properly not much will be flowing out of either end. the wood should go on the top shelf of the feeding tube allowing air to flow underneath to ignite the tips. after a few minutes the cooking surface will get hot and you can begin cooking: stir-fry's, hash browns or cottage fried potatoes, curries, barbecue, fish, rise, pasta...
People are drawn to the smells coming from the rocket stove: the burning wood and caramelized veggies.
Have a great dinner with them, talk, make friends/future friends and stay warm.
*we put this rocket stove on a pallet for ease of transportation and increased air flow which was a bad idea because our rocket stove got too hot even on the bottom so that it charred and smoked the palled but also because bits of coal falling through the combustion chamber (we left a hole in the bottom for added air flow as an experiment) would set the pallet on fire.