Single burner camp stove

Click on the pictures to see a larger view

The burner has built-in legs to sit on the ground, and built-in arms to hold the pan. There are three legs on the burner since this will sit on any uneven surface without rocking.
The burner outside is a piece of 6" pipe. The inside is a piece of 3" pipe. The top and bottom are enclosed with 1/8" sheet. Legs and arms are 1/2" rod. The air/propane inlet, in the shadow on the right side of the burner, is 1" pipe.
The burner looks small in the picture, but that's an 18 inch skillet!

The burner on low

The burner on high. See the yellow flames? This indicates the mixture is a little too rich. It's difficult to size the jet/venturi to produce exactly the same mixture over all flow rates. I tuned the jet/venturi to work well at lower heat settings. You'll rarely use the "burn your food" setting shown here.

The flame holes were drilled with a #42 drill bit. You could probably get away drilling them another size, but too large of a size will allow the flame to jump inside the burner. Too small of a size will push the flame away from the burner, and blow the flame out. The speed of the air/propane mix is what's important.
My flame holes are drilled a little uneven, but it doesn't effect the performance. The burner needs to be fully welded. Any pinhole will result in another little flame. The burner has a hole cut into its side. The pipe from the jet/venturi is welded to cover this hole. This allows the air/propane mix to flow from the jet/venturi and into the burner. The pipe is roughly 5 inches long. It could probably be shorter (maybe 3 inches), but you need it long enough to allow the air/propane to mix well before reaching the burner.

The jet is just a piece of 1/4" copper tube with the end hammered closed. A small hole is drilled in the end to make the jet. I used a #55 drill bit. The venturi opening was drilled with a 5/8" drill bit.
Some trial and error was required to size the jet and venturi to match the burner.
The venturi is just a washer that was drilled to size and tack welded in place. You just need enough weld to hold it in place. Any leaks don't matter. It's *supposed* to let air in.
The fitting on the end is a "B" size left-hand thread fuel fitting. These match a standard cutting torch hose.

Also see the griddle and deep fryer I built.