On Firestarters
There I was, overlooking the Kilauea, one km above sea level, 3700 km from the closest continent, in the middle of a vast treeless lava field. There was a pleasant yet strong breeze making the tropical Sun easier to stand. It was lunch time and I was looking forward for a hot meal after all the rough hiking.
I was well prepared with my, mostly homemade, ultra-light backpacking gears: Cobra Stove, aluminum foil wind screen, mesh pot stand and camping saucepan. Everything was perfectly calculated: with 175ml of alcohol I was good for six meals, all what was needed for an overnight back-country trip with a generous margin for errors. I had a watertight matchbox with a capacity of 20, that was more than enough. Right?
Compared to other Zen Stove designs, the Cobra is more fuel efficient. Construction is as simple but you need a primer pan (video by Don Johnston) in order to reach the inner pressure that makes the jets burning by themselves. The principle of the primer pan is simple: you let your stove sit in a (really small) bath of alcohol that you set ablaze. If the bath is too small, the stove won't get hot enough and you have to repeat the procedure, no big deal here. If the bath is too big, the stove gets too hot and you might have noticed that design don't include a relief valve. If you are lucky, you waste all your fuel in a few seconds of 50 cm flames, otherwise the stove blow up. Obviously, I tend to make small primer baths.
