Caldera cone got three different systems you can use as wood
burning camp stove: Ti-Tri, Ti-tri ULC and Ti-Tri sidewinder. They are
pretty much the same with some changes so that it’ll fit your specific
needs. All three are a inheritors off the original caldera cone which
is a great staring point... The folks from Trail Designs just made the
adjustments so you could use the cone with wood too.
The basic one. It is pretty much the same as the
Caldera Cone but this one is made of Titanium (Hence the Ti). It
enables it to run on woods. What I like about the Ti-Tri, is that when
you use it with Alcohol burner or esbit, the Pot is completely
surrounded by the cone so no heat is wasted. The pot is totally
submerged and only the lid is kept outside. Every bit of energy goes to
heating up the pot. Keep in mind, though, that on its wood burning
mode, the pot is held by two metal stakes and it is not completely
inside the cone. It reduces the efficiency a bit of course. But still,
A great system.
ULC stands for Ultra Light Compact.
The big idea is the same as in the Ti-Tri. They just made the ULC a bit shorter so you can fold it nicely and store inside the pot you are using. The problem is, that since it is a bit shorter version, the pot can’t be totally submerged into the cone and the whole system isn’t as efficient as the Ti-Tri. On the other hand, if you are trying to save every bit of space, it does help.
On the sidewinder, you get the best combination. The height is
somewhere in the middle but it folds real tight. On the one hand, it is
tall enough to keep the pot inside the cone. On the other hand, you can
fold it so it will fit inside the pot sideways if your pot is wide
enough. Cool! Here too, buy the way, the pot is standing on the stakes
if you are using it with wood.
Multi-fuel (Not in the traditional way)
When you think of a multi fuel backpacking stove I guess you think of a benzene based fuels, perhaps with ability to run with gas too. This goes for stoves like Primus omni-fuel, MSR XGK-EX or Optimus Nova. That’s the classic concept of multi fuel.
BUT - Caldera cone stove are also multi fuel. They are designed to run on Alcohol, esbit and wood. Totally different fuel types. Not only that, you can also run them as wood gas stoves! So, aren't they considered as multi fuel?
When you get a Caldera cone, you get the full system. The cone
serves as a pot holder and as the windscreen. It comes with their
Alcohol burner and with some esbit burner. The system won’t work
otherwise. You get the size that fits your pot so that you get the most
out of it.
The concept of all the cones is fairly simple yet ingenious.
As I mentioned above, the cone functions both as a windscreen and as a
pot holder. You get a structure that saves all the heat for heating so
no heat is wasted. They designed the cones with the right holes so the
flames will have just the air it needs to run. It sounds ridiculous but
the holes are tricky if you try to build it yourself. Too big, and you
get too much wind and heat might be wasted. Too small, and the flames
want run as high as they can. In all the designs here, if you are using
wood as fuel, you have to raise the pot so you’ll have enough room for
the sticks and twigs. When you do that, it also opens a hole to throw
the twigs in.
These three are not only wood burning camp stoves, you can turn all of these stoves into a wood gas camp stove! Just add the inferno, which basically is a flipped-over cone, slightly smaller than the outside cone, and you can gasify the wood you are burning. More here...