This is a cut away diagram of the rocket stove that I am thinking of building for my shop. It appears that they get their name because of the rocket like noise they make when burning. From what I have been able to learn combustion is nearly complete and they emit little or no smoke. The drafts position at the base of the chamber and the insulated combustion column create sufficient over pressure in the drum to enable down drafting of the exhaust gasses. From what I have been able to glean from the groups that are using these heaters in Northern Idaho for Biomass heating they are also quite efficient. I have designed this unit with the fuel feed at an angle with the option of installing an auger driven automatic fuel feed hopper to be used to burn either sawdust and/or pellets as well as shop generated scraps. The sliding draft gate will enable me to control the combustion as well as close off the draft at the end of the day and thus make sure the stove is self smothering.
Oh and by the way, it also gives me an excuse to look for a good used MIG welder since the drum and combustion chamber must be welded and/or gasketed to maintain an airtight environment for the down drafted flue gasses.
Dale in the Flatlands.
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