1. Get 2 empty cans that fit inside each other with 1/2″+ gap. I can’t say which–perhaps a 25oz tomato and a 16oz soup can.
2. Trace an outline of the smaller can on the bottom of the larger, then remove this circle–cutting slightly inside the line.
3. punch holes: around the top of the side of the now partially bottomless larger can; around the top of the side of the smaller can. Experiment with hole size and number.
4. either pepper the bottom of the small can with 1/8″ holes, or replace it with hardware wire–wire works better.
5. Fit the two together, so that the top of the smaller can is just sticking out through the whole you cut in the bottome of the larger can. If you cut the hole properly, you should get a reasonably tight fit. A perfect seal is not necessary. If you want to get fancy you can use high-temp epoxy or flue tape.
6. For the best burn, fill it up with chunky biomass, and light from the top with alcohol gel, or some other starter that won’t get in the way of air flow.
7. For a pot stand, try mimicking that of this wood stove, or use your creativity.
http://www.woodgascampstove.com
For more info, see:
http://www.repp.org/discussiongroups/resources/stoves/Anderson/GasifierLAMNET.pdf
ALW