[pct-l] Isobutane Canister performance

[Jim Marco]

I have corresponded with Roger Caffin about his new canister stove. He mentioned in one set of notes about 8g/liter, best case in the field. This is using a remote canister stove and tight fitting wind screen on low heat. This is a LOT better than what I got from my old Coleman F1 at about 18-25g/liter or the old Windpro at 14-18gm/liter. Excuse the variations, this was from numbers a few years ago and averaged over several days (about 3 or 4, one week trips.) With a partner, my wife, I found fuel usage was even higher, as was the need for boiled water, and went back to the more efficient SVEA.

Since I enjoy my time out, I eat a fairly large breakfast and supper: coffee (2 cups of oatmeal and 2 cups of coffee,) a couple light snacks during the day, and a larger supper at night (again about 1 liter, 2-1/2 cups for food plus simmering, about 1 cup of cocoa, while I wait for supper to finish.) 

The numbers cited are well within my expected fuel consumptions for a canister stove. There are a LOT of variables. It is not real great (8gm/L was best,) it is not real poor(25gm/L was worst,) but rather in the lower mid line. 6.1gm for 1.75 cups is an odd measurement in the sense that it mixes metric and English measurements. But, interpolating to quarts (1Liter=1.05669Qt) we get about 14gm per liter. This is a good enough number to use for most conditions. Winter, High altitudes might need a bit more. Different stoves will also require more or less. 

	My thoughts only . . .
		jdm