Gear

Mike - if you mean the burner that comes with the mini trangia set?  I thought that was just a standard Trangia burner - it's the pot and stand which are the 'mini' part...

I think that that sort of burner has too  wide a flame pattern for the width pots you are talking about.  It would send flames up the side of the pot a lot, and overheat the cone metal.  You want a more focussed flame patttern.  e..g a chimney stove or a Starlyte or an open burner made from a red Bull can.

You could make a 'flissure' version of the cone - which splits apart and would nest inside your pot.

 e.g.

G wumpy wrote (see)

My first efforts at a Clone for a Snow peak 450 cup. Many thanks to CP for the program and Yonky for the material

I've finally been prompted to address an issue that has been niggling me for some time; the potential for the Flissure joint to 'cheesewire' through itself, or for the V-slots to split.

The solution I thought of was to put little terminating circles at the end of the slot.  I held off doing this because I wasn't sure if this would cause the joint to become sloppy (as there would be no well-defined alignment position).

However, UltraMagnus posted his clone on this thread on BPL, with little circles just as I'd envisaged, so I've added them to the script.  You can choose to use them or not.  I haven't built a clone featuring them yet.

The BPL thread then went off into a heated discussion of the legality and morality of making your own clones, which, as the originator of the script, made me ponder.  It seems that US patent law is different to UK law (and, I suspect, the rest of the world), in that it seems US law says making your own thing for personal use only is a patent violation.  UK law says personal use is not a violation.

I'd like to thank b_a for digging out Trail Designs' view on personal clones, where they say their objection is to commercial exploitation.  So, whatever the US law is, TD choose to follow a UK model, either because they're nice guys (which all accounts suggest they are), or because it would be stupidly expensive and largely pointless to pursue.

I've added my rationale to the end of the BPL thread, but I'll just echo that the main reason for choosing to use 'Caldera Clone' was to make sure that it was obvious where the idea came from, and that, whilst the script is my implementation, the concept of the Caldera Cone comes from Trail Designs.

The other thing that came out of the thread is that TD do make a Fissure Cone, which is one of the reasons that many script requesters mention as cause for them asking for the script.  Since TD don't publicise the Fissure Cone, anyone looking at their website wouldn't know that they make it, so are forced to resorting to make their own cone to fit the pan it supports; there doesn't seem to be one to buy.

So, if you like the idea of a two-part cone to fit in your pot, please get in touch with Trail Designs, and ask them nicely if they'll make a Caldera Fissure Cone for you.

hey I'm trying to spec a Cone system, currently in my mind's eye.

So if i get a wide enough, shallow enough, pan then the cone is short enough rolled up it fits inside the pan? Is there some critical width/heigh ratio I should seek from the pan?

 Also don't you need the cone to be sufficiently wider at the base than the top to make the system stable? So not a steep-sided cone?

 Currently the only pots I own are the Duossal pans from a Trangia 27 kit, it was stated by CP that the Duossal have too small a lip, not rolled like the HA / Alu type pans, so can't be used? Not unless there's some pegs or something under the pan to take the weight???

I ordered a Jetboil and next working on my Cone system, intention to own both as they are complementary I think.

Have a look at pages 9 and 11 of the readme.doc or use the 'print thread' option at the bottom of this page to see the last 500 posts, and scroll through to see lots of pictures.

On the template, the tabs are identified by the 'V' cutouts at each end of the tab.  The fold line is shown as a dotted line.

The slots are shown as a simple, four-sided cutout with sloping sides; all lines are solid to show that they are to be cut.

The upper tab should fold out.

The lower tab should fold in.

Ah, no.

Whilst i used CP'sscript, i designed my own closure.

> I just thought there was an additional slot joint where you fold that triangle on the end

No, the folded triangle is simply to reinforce the edge of thin foils to stop it bowing out.  In thicker foils, this may not be needed, or may be a simple, single fold.

BTW, since I'm here, I've been pointed to an archive snapshot of the ZenStoves website, dated 07 March 2005.

Note the last bullet point of the introduction:

"You can also make a windscreen that's cone shaped to allow it to have enough space away from your stove at the bottom and then come in around a narrow pot at the top."

Date of filing of Rand Lindsly's patent application?  07 June 2006.

I think we may have 'prior art'...

Well spotted CP.