Thanks to YouTube I was able to learn about the fabulousness of rocket stoves.
What’s special about a rocket stove is that you can cook using an astonishingly small amount of fuel – not that many twigs are needed to boil water, for example. The reasons I wanted one are a) to reduce the use of gas and make use of the vast amount of wood hanging round on the property, and b) to cook outside in summer and not heat up the house.
The basic idea is that you have an L-shaped bit of stovepipe (or chamber) that’s about 10cm in diameter, and you put the fire in the foot of the L, and sit the pot on the top of the L. You need to make a little platform in the middle of the foot of the L so that the twigs can sit on it and there’s space underneath for the air to flow in, providing plenty of oxygen for a good flame. The stove pipe also needs to be insulated, preferably with something that will hold the heat nicely. I watched a few videos, but in the end the simplest one was this: How to Make a 16 Brick Rocket Stove. I had plenty of bricks lying around. The only bit that foiled me was that in order to make the foot of the L the right size, I need to have a half-thickness brick. No go. And I had no chance of cutting one. In the end I solved this by placing a few tiles I found in the bottom.
This stove took me about an hour to make, including finding the drawers to sit it on and shifting them into a nice shady spot opposite our front door, and tracking down the slab of marble which I laid on top in the hope that the drawers won’t catch on fire, and tempting the redback spiders out of the holes in the bricks. If you only count the time to actually make the stove, well that’d be about 10 minutes. I put a big white tile behind the stove in the hope of protecting the fence, put in some paper and twigs, sat our pot on top, lit the stove and snapped this pic.
The white tile became black. The pot became black. The drawers were covered in ash. BUT IT WORKED! I couldn’t believe that something so utterly simple could actually work so well. It got up a nice big flame quite quickly, was pretty easy to keep going, and after a few hours the bricks and ash were so hot I could boil water on it super-quick with only a low flame. We filled that huge pot with stock and boiled it all day.