MSR (Mountain Safety Research) makes a dynamite stove in the Dragonfly model. I climbed Mt. Shasta this past summer, and on that trip we had my Dragonfly melting snow for about 3 hours!! It used 1.5 of the small fuel canisters (11 oz I think) on the whole trip, which included a dinner for 3 and melting snow.
Like all MSR liquid fuel stoves, fuel enters a heated tube, vaporizes, is mixed with air, and exits the fuel nozzle like a jet engine, roar and all. However, unlike some models, the Dragonfly is built to allow precise flame control, including a tiny simmering flame. Its fuel efficiency is unbelievable, and like all white gas stoves, beats all compressed gas stoves in winter use. These pretty pictures are from MSR.
Other stove links: Primus, ColemanGI Pocket Stove
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