Bill James: Can you try that again using a little chunk of C-4 for fuel?
Dan Murphy: rocket stove
robomanism: there are about 5 on there for $20
phrankus2009: 1) Raise the height of the Tri-ox bar on the bottom of a car-tin or some other insert, that will put it within an inch (or two) or "closer" to the vessel.
2) Shugmery made a pot-lid, and used the cup rather than the flask ... under 8 minutes using a mini-bongo spirit burner.
3) Wondering is fresh production ESBIT cubes would fare any better. (if the height was properly adjusted / elevated).
4) Turn off the lights !
5) Thanks !!
scarekrow9: I'd like to know the source for these little stove, if they can sell them for 10 bucks imagine how cheap they would be at cost.
Cliff Wilson: looks like that would be enough to pasturize your water, but cooking is out
calld2serve: Can you do a test like this with the Volcano and one of the webber fire cubes
PHARRAOH: how tall each,are the cooker and the bottle? also, can you tell me the out side diameter of the cooker please?
TheBeebopper: At 4:15 on your timer there is an expansion of gases in the lower part of the stove as evidenced by spilling of the flame out of the 'doorway'. Looking at the fuel tab there is a white stream jetting from it. It is my contention this is (likely) the magnesium being released from the stearate of a fuel tab polymerised with such. The burn was clean before but quickly overheats causing smoking in the restricted burn area. It may perform perfectly with the base on cold ground.
MrBillTroop73: My apoligies, I no longer have one to test.
Justin DiPlacido: How come you always use trioxane that is so old, is it no longer made?
TheBeebopper: So the pattern for those candle holders is an efficient burner pot. It keeps the heat of combustion away from the pot wall and so directs more heat upwards. I'm thinking it should burn alcohol or gelled alcohol well, as it stands. Have you one to test?
MrBillTroop73: The incoming draught certainly helps to cool the glass, and I remember always being able to lift the glass with bare hands, though some warming occurs from radiant rays.
TheBeebopper: In the variation of practical sizes, used in still air there is little difference.
I had forgotton about those candle holders, Is the glass kept cool by the incoming draught?
I think the venting as you describe is reliant on the pan having flared sides when it is circular. Squeezing a can in the middle with burning fuel in the bottom obviously gets sufficient draughting into the can to maintain the burn at a regular rate. This is close to one of my suggestions for submersing the triox.
MrBillTroop73: I believe that venting into a circular vessel is dependant upon the diameter of the vessel.
Certainly a candle that is deep inside of an un-vented hurricane candle holder burns very well, but is absolutely dependant on external oxygen.
If there is a wide enough diameter, convection of the hot gases rising straight up creates the airflow needed to bring fresh oxygen in from the sides.
TheBeebopper: There is little venting into a circular pan unless the burning face is within 1/4" of the height of the pan. I'm certain you would have seen some smoke if US military triox bars required supplemental oxygen. I think these bars are marked in thirds and suspect that is needed to sterilise one cup of water if not actually to boil it, raising 200ml water by 80degC or 8floz by 144degF in a metal mug probably sat on top of a rectangular pan such as the end of a 12oz corned beef can.
MrBillTroop73: It would be difficult to say that Triox does not need external oxygen, and that it just supplys its own.
I believe triox needs sufficient external oxygen for effecient burning.
TheBeebopper: The triox did not smoke from a circular pan when Hiram tested it floating on the water, it is using its own oxygen. He could have had a kettle over it and heated that and still warmed thew water underneath. Or perhaps it is the keeping the fuel 'cool' made it burn better. One, other or both. Easy to stick it in a deep cup and see in the Swiss Ranger stove.
MrBillTroop73: I would have gone the other way, feeling that it needs even more oxygen to prevent the sooty, smokey fumes displayed here.
However, you pose an interesting concept.....
TheBeebopper: Well that's old fuel Hiram is using, a little unstable. I most certainly would try to burn it in a cup which reaches almost to the bottle without any venting. Containing the gases in a burning cup to permit temporary storage may be the only way to use these tab's in their condition. Although they may be burnt in the open and burn well when in good condition, containing them and using the released oxygen should improve efficiency because there is no requirement to heat incoming air.