This is a discussion on Fire Roasted Coffee within the HomeRoast Reviews forums, part of the Coffee Forums category; Curious to find out if anyone has ever roasted coffee over hot coals or fire? Maybe direct, med-high heat smoking? ...
Glad to help out. Charlie is a very interesting guy, by the way - knows his beans about coffee. I believe he has since departed Mexico for Vancouver, BC. He probably left that woodstove behind somewhere in the forest or jungle or whatever suburban Oaxaco is. It's waiting for you maybe.
Last winter, when the power was out, I roasted a few ounces of beans in a cast-iron frying pan on a rocket stove on my porch. I just stirred them with a small stick and didn't let them stop moving.
The heat was higher than I would have liked (I usually ease the beans up as slow as possible to the first crack, then hurry them to the second crack). I had them finished in maybe five minutes. Too fast, but the coffee was pretty good. The kettle boiled real fast on that rocket stove too. The only part that took time was using an old manual grinder on the roasted beans. No power, and I went from raw beans to brewed coffee in about 15 minutes!