about 1.75 ounces of fuel = 1 hour, 15 minutes, simmer ring on

https://picasaweb.google.com/100782710190373504249/AllThingsPennyStove

Edited by hiflyer on 11/25/2011 23:09:27 MST.

I have been fiddling with alcohol burners for a while now, but I mainly gravitate towards the pressurized jet type filled with fiberglass insulation. Many different versions that I have made have an average burn time (I always run my tests with 30mL/1oz of fuel plus about 3-4mL around the burner for priming) of around 10-12minutes until total flame-out. The longest burn time that I have gotten though was about 16 minutes (17 until total flame-out). However, these tend to take much longer to boil a pint of cold water than my open burner or chimney style burners (which will burn for around 8-9 minutes but boil a pint in around 4-5 minutes).

I'm a closet alc stovie myself since getting really heavy into the UL thing about 6 months ago.

I've made penny stoves from Jurey's intstructions, cat can stoves, and even sort of made my own designs up.

My favorite two, are my own design: one is a V8 can, 1 1/8" tall. I used the un-opened top of the can to make the bottom of the stove, and the bottom to make the top. I poked 9 holes in the rim that would normally be in contact with the surface of the table when drinking from the can, and 3 more pointed 'inward' from the radius where the rim meets the concave surface. A center hole allows for filling, and is sealed with a brass eyelet screw in use. This one managed a 5.5min burn on 1/2 oz, heating 2c of water from 70*F to 180*F with a Zia pot stand, and an alum. foil screen on my back patio in 65-ish* weather.

The other is same design, 6 holes total (3 shoulder, 3 radius, staggered) made with a 11.5oz redbull can cut to 1 5/8". It burns much slower: 9min burn bringing 2c of water to 180 in about 6.5 min, and almost a real boil before it dies.

Bumping the fuel to 1oz easily doubles the run time, and holds water at a boil for more than a couple minutes.
Disclaimer: water simmers at 190, and boils at 200 here at my house.