Comparison of Alcohol stoves

[Dwight Shackelford]

Has anyone done an objective comparison/evaluation of the different DIY alcohol stove designs out there?

Seems like half of them claim to be “the most efficient”.

On the Sgt. Rock Ion stove, does anyone know if the flames are supposed to come out of the center hole, or the smaller holes around the center hole?

[E. A.]

I use a modified Pepsi Can stove from PCThiker.com:

http://www.pcthiker.com/cgi-bin/dcforum/dcboard.cgi?az=read_count&om=72&forum=DCForumID4&omm=1&viewmode=threaded

and there is a better picture here:

http://madscience.livejournal.com/311589.html

In that model a coin is used to block the fill hole to create better pressurized jets, I guess. Anyone else use this one? Only need tools and two pop cans.

[Dwight Shackelford]

Is it true that the hotter the incoming air, the better the stove works? Seems I read that somewhere.

I had an idea last night for preheating the intake air.

[Dwight Shackelford]

Thanks for those links. I’m kinda working up to trying to do the pop can thing.

[E. A.]

Real quick: I ended up using a small pineapple can (50 cents) for a stand. Simple: take off lid. Use church key to punch holes in upper portion and lower portion. Voila. I did go one step further. For $5 at a hardware store I bought a kit for sealing stoves, contained: fiberglass rope, and adhesive. With this I put three little wads of rope to the bottom of the stand to use as a wick. 10 second light off!! Pictures to come…

[Dwight Shackelford]

So, anything billed as fiberglass is inflammable? I almost bought some fiberglass screen but decided on aluminum instead. Couldn’t find brass. I wonder if the aluminum will oxidize away quicker than the fiberglass screen.

[E. A.]

The fiberglass wads only hold a flame for about 25 seconds (WAG) which is long enough to heat the fuel in the stove to a point where it exits under pressure and “contribute” a flame to the pressurized fuel.

What I like about the stove design is that it does not need mesh, or fiberglass to burn. Originally, I would dribble fuel down the sides of the can and light it with the fill hole uncovered, then tried to throw the coin on, which if you have ever played tiddly winks, hardly ends up covering the fill hole.

I would highly recommend you try the pressurized Pop can stove. I used a dictionary, a box cutter, and a Dremmil with a thin drill bit, and needle nose pliers. Cheap and easy.

[Dwight Shackelford]

Well, I bought some JB Weld and some blades tonight, so I’m getting closer.

I was fooling with this other thing I’m working on. I can get some boiling in 8 minutes, or 195F simmering for 28 minutes. .66 oz fuel, no heat shield. Optimal conditions.

What is the optimal distance from a stove to the pot for heating efficiency?

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