Most of the DIY stove uses wood or alcohol since these stoves are the
easiest to build. Both wood and alcohol got their pros and
cons when it comes to building your own stove. Alcohol stoves are
light, and you can carry only the amount of fuel you need.
On the other hand,
for long hikes, carrying that much alcohol might be a problem. If you
build a wood stove, it will probably be quite big. But,
naturally, you don't really carry the fuel. You get it on the trail...
There are some homemade wood gas stoves, too. But it’s a bit
to get them right...
Of course you can make all sort of backpacking stoves on your
Check the homemade
page on this.
Wood gas stove
Wood gas stove is based on few simple principals. The complex
to get your stove to actually use these principals right. In a
nutshell, air is rushing through the double walls of the stove. It is
heated and then injected at the top of the stove. The whole thing makes
wood burning way more efficient. The thing is, that the holes can’t be
too small (not enough air) or too big (too much air, it will not heat
up). It’s a real challenge, the design must be precise. Read more on
wood gas stoves here.
Homemade wood gas stove
Although it’s a challenge, you can find several solutions for making
your own wood gas backpacking stove. The one here is the one
I love the most. The instructions are clear and full and the size of
the stove is just right. It is based on two cans, 3” and 4” and it
doesn't require special skills or tools.