I've been watching videos on YouTube that explain how to make a rocket stove, but being deaf, they are a little confusing without the sound. There's only so many things I can bear to harrass Paula into interpreting for me, and rocket stove videos doesn't make the grade. I was telling some friends on Friday about my plans, and about how I was planning to make a stove but hadn't yet deciphered the video, and Sally immediately whisked out her computer, got us connected to the net, and began jotting down the key points for me. What an angel! Ariane took over when Sally needed to tend to the kids, and between the two of them, they got me totally sorted as to the concept of how a rocket stove works.
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 want one are a) to reduce the use of our gas and make use of the vast amount of wood hanging round on our property, and b) so we can cook outside in summer and not heat up the house.
The basic idea, I gather, thanks to Sally and Ariane, 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 stovepipe also needs to be insulated, preferably with something that will hold the heat nicely. We watched a few videos, but in the end the absolutely simplest one was this: How to Make a 16 Brick Rocket Stove. We've got 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, we need to have a half-thickness brick. No go. And I'm not trying to cut one. In the end I solved it by placing a few tiles I found in the bottom.
This stove took me about an hour to make, once you include 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 is now black. The pot is now black. The drawers are now covered in ash. BUT IT WORKS! 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.
I think in future we won't use it for all-day slow-cooking though, as it needs a fair bit of regular attention. I think we'll be better to put the stock or the rabbit stew (which we made today) in the solar oven (when we have one), and use the rocket stove for an hour or two to cook dinner and an extra dish or two with the surplus heat.
I got so inspired by my quick success with the rocket stove that I started looking at plans for a home-made solar oven.. but that's another post! I'm also dreaming about how we can harness some of that extra heat from the rocket stove by creating an oven beside it. The theory is there but the mechanics of how to actually build it.. hmmm.. maybe I'll go and google wood-fired ovens now.









