Bushwalk Australia

Mark F wrote:Camping Gaz do make some lighter butane/propane cartridges but they are not available in Australia. Not suitable for upright stoves but could easily be adapted for remote canister stoves.
http://www.campingaz.com/c-608-diy-cartridges.aspx

What do they weigh empty?

One could adapt all sorts of containers. But since we're talking about 130g it should be a significant savings to make it worth the trouble.

Another outside the box idea: A small hand pump that connects to a Lindal valve for introducing air into a canister. That way even with normal butane fuel one could use the canister inverted with a liquid feed stove in sub-zero conditions. The air could later be purged through the stove for use in vapor feed mode. One would need to take care to prevent overpressurizing the canister with air since the pressure equals the sum of the vapor pressure and introduced partial air pressure.

I like the pressurization idea. If you use a CO2 canister and have done way of measuring it, you could use n-butane in a liquid-feed stove, use a lighter canister, and still be able to use it in frigid conditions.
It would suck if you accidentally purged the CO2 in the middle of a hike though.
In Australia 400 millibar would probably be enough.

I'm not sure if it is a good idea or not. Just a thought.
But why would you choose CO2 instead of air?

It might be enough to simply pump enough air into a fresh canister at home or the trailhead to increase the pressure by about 2 bar. That way you could use a proper floor pump with a good gauge and it's not so much added pressure that it would constitute a danger. By the time the canister neared empty the air pressure would be about five times less which I suspect would still be enough to push non-vaporizing fluid out into the stove.

But I could be overlooking something important here.

corvus wrote:Wowsers !!?? a wheel reinvention perhaps ??
I personally will stick to the true and tested
corvus

+1

If I'm going to save 130g (or less), I'll do it in such a way that my safety isn't put at risk.

Strider wrote:If I'm going to save 130g (or less), I'll do it in such a way that my safety isn't put at risk.

Of course. This is just hypothetical. Nobody is really going to try this.