OK all you alcohol burners....help me out here.
Am playing with a Brasslite Turbo IID and having an issue with my windscreen design that is causing undesirable results.
Using a MSR Titan Kettle (.85L), 1/2 oz denatured alcohol. Windscreen constructed with aluminum roof flashing, one row of 1/4" holes spaced 1" apart, 1" from bottom edge, heightened to just clear the bottom of the pot handles when opened. Windscreen gap is 3/4" from pot. Perfect; windscreen fits rolled up inside my pot real neat. I like that.
Using this set-up I'm getting a whole lot of flames shooting up the sides of the pot AND shooting out the simmer slots of the stove. On the assumption that I was getting a radical burn effect caused by radiant heat from the windscreen I repeated my test opening the gap between windscreen and pot to 1 1/2". At a 1 1/2" gap I get a good efficient burn; boiling 2 cups of tap water in 7 minutes and a total burn time of 9 minutes.
All of these observations were performed in a closed garage with lights out to better visualize what was happening and no wind to screw with the flame.
Taking the whole shebang with redesigned windscreen outside in moderately gusty wind conditions the whole theory now falls apart. The wide gap (1 1/2") between windscreen and pot now does little to block the wind. Flames being whipped around like a dust devil, 1/2 oz fuel burning out in 3 minutes, no water boiling, etc.
OK back to the drawing board! New windscreen now extends to the top lip of the pot and with the new 1 1/2" gap. Radical burning is back. Uh?
Been following stove/windscreen threads here with interest and note that some use tall windscreens, some half-way up the sides, some 1/2" from bottom of pot. Most, I've noted, are using a relatively small gap between pot and screen ( 1/4" ~ 1/2") with no apparent ill effects.
Would dearly love to use a design that would allow me to store inside my pot but so far have been unsuccesful. Am I stuck with a tall windscreen & even wider gap? Anybody else ever seen this radical effect with a 3/4" gap? Brasslite windscreen instructions call for a minimum 1/2" gap. I'm in spec....! Can you hear corporate America singing!
Solutions, comments, BS, smart-ass remarks? I'll accept all! Thanks in advance guys/gals/other.