This video is EXCELLENT. My caldera cone melted, mostly because I put too many holes in the top edge. It lost its heat dissipation ability and the aluminum melted.
Man that is too awesome! I am a Trangia owner, but wanted to lighten up my system a little. I appreciate your video and I hope that I can make something that kewl too!
I found the best performance was from a small V-8 can double wall styled burner. The flames from a Pepsi can size burner would overshoot the pot and burn up the cone. I'm not sure I understand the O2 issue. Starving the burner would be bad. Too many holes defeats the cone efficiency. On a different note, I have now a 2 piece Caldera Cone that stows inside my pot. Simple to do and eliminates the need for another conatiner to stow the cone in. I'll be putting a video together on how to make it
Titanium sheet is the only lighter yet durable material I can think of. Search around for Ti sheet. Expensive but should last a long time...more so than roof flashing.
You can easily cut the roof flashing with scissors. I'd recommend using the titanium coated type for longer wear however. Have fun with it! Harbor Freight sells a very inexpensive hole punch (different size hole selections) that works great for making the exhaust and intake holes.
Great video. Just made one over hear in UK, can't get titanium foil, so had to use chinese 0.10mm stainless foil, turned out just as described, but ended up with fingers cut to pieces, ha hah. Works a treat , keep safe and well.
The red lines simply show the shape of the cone, either short and stout or long and slender. By moving the "common point" higher, the cone becomes more slender
A very well made tutorial. I have no doubt this can be made with titanium foil. I know titanium goat sells the foil. You may be able to find it cheaper elsewhere though. Nice Job.
Perhaps a duct work reducing fitting might be easier? Say 10" to 4" reducer? I think they have those for wood burning stove ducts too (black in color and no zinc coating).
Thanks so much. Your video makes it easy for a non math person to make this. It worked great! Do you have suggestions for a lighter material to use? My cone weights more than my heinekan pot.
It needs to be 1-1/2" because the 1/2" inward bend and 1/2" outward bent overlap 1/2"....therefore you need to add 1-1/2" to your length dimension. You may find it a bit tight around the pot as a result but you can trim the 1/2" inward and outward bends to gain a bit more circumference. Actually adding 1-3/4" works a bit better.
@2Questions007 do you make your own stove as well? I ask because according to Trail Designs, standard alcohol stoves don't work well in the low O2 environment inside the cone
I hope your vid on the 2 piece cone is still in the works - I'd really like to see that! Have you experimented with an "open-type" can stove using plumbers cloth inside to help optimize stove/cone efficiency (boil the most water with the least amount of fuel)?
do you still have this cone? It looks like you're using a MSR Titan .85l pot. If so, is there any chance you could trace a template for it and upload it?
Just a heads up, this doesn't work wtih a pot bigger than 6" diameter. the foil is not tall enough. On the other hand it does leave a cool triangle hole about an inch high in the back. Maybe this will be a replacement for the intake holes.
Because the joint is actually 4 layers thick. The first layer determines the circumference. The second, third, and fourth are overlaps. At 1/2 inch each, they total 1-1/2".
Stephen Haitch Actually since that video was made, I have figured out a way to make a two-piece Caldera cone that easily stores in my pot. Quite simple really, just make two identical cones, cut them down so that the top one overlaps the lower one by 3/4" so that when together are the total height you need. You will need to "pin" the lower cone so it will not collapse under the weight of the pot and water. Drill a hole and insert a bent piece of coat hanger to pin it.Hope that helps.
I made a similar split cone about five years ago, after seeing a vid from Wandering Dot. I ran into the same problem of collapsing under the weight and came up with a workable, if inelegant, solution using a small screw and washer. I'm looking at improving the design. Do you "pin" this through the lap fold or outside it? Top and bottom, or just one?
The video is great, but you are making a (geometrical) mistake: In your case the piece of flashing you cut out is exactly 5 3/4" high (like the desired total height of pot+space+burner), but due to the fact that you create a cone and the flashing is assembled slant then, your finished cone is not as high as desired. The solution is a bit more complex, but if you want I can send you a scheme. Just let me know.
+Jannik Mi is the solution just simple trig? Where one side of the triangle is width at top - width at bottom, another side is his desired height, and the side you solve for is the actual height you cut the metal to?
