New Design of Charcoal Stove

I looked at modifying the current stove, but nothing effectively increased the efficiency of the current design. I found a charcoal stove used in a country in Africa that twigged my interest. A couple days later I was in our local hardware store and noticed a small cooking stove in their bar-b-q section. I combined both ideas and came up with a new design. I spent many evenings running one hour tests to see how effective the new design is and was satisfied with the results. My prototype was made from 8" stove pipe 7" long and modified with a pair of metal snips. Pictured below is the first prototype, made by a Haitian craftsman. Believe it or not, he used a cold chisel and hammer to cut out the shape.