Saturday, March 21, 2009

Caldera Cone

I've been pretty interested in the Caldera Cone as an integrated windscreen and pot stand. So... I made one. Here is my first attempt. It is for my GSI Stainless Steel Glacier Mug. The mug best suited to boil 2 cups for simple solo dinners or hot drinks.

The Caldera Cone is a pretty brilliant idea. As a windscreen, it traps the heat from your stove much more efficiently than other windscreens, lowering your boil time. I made this one with 10" aluminum flashing. It takes about 2 feet of flashing to make a cone for most small to medium sized pots. Your pot must have a good, outward rolled edge to set on the cone. Pots with no outward lip will need separate pot stands.

I think the major drawback is that it does not roll up small enough to fit in the mug. It can be put in your pack flat, up against the back panel, or rolled around a water bottle and held with elastics. This particular mug is sized to fit a large mouth Nalgene into it, so it can pack pretty small.

As you can see, it gets hot. The first try proved that.
The cone unhooks at the seam and can lay flat or be rolled up.

The large cut out is for the handles on my mug.
The small holes along the bottom are to let oxygen in,
and at the top let out the carbon monoxide.

Here it is with the mug set in place.
I made a lid out of an aluminum bake sheet for it.

Here are all the pieces separated.
I'm actually using a smaller diameter alcohol burner now.

2Questions007 from Hammock Forums has made an excellent tutorial on how to make your own. Check out his video here:

1 comment:

  1. I did the same thing as you-- ran the contraption so hot that the sides discolored. This is symptomatic of having your stove's flame too big.

    Need to throtle down the flame, somehow, to avoid that in the future. I accomplished this with the simmer ring on my Trangia burner.