I found this at a surplus store years ago, and I had to have it! It's SOOOOOOO much better than a Coleman, and it can burn just about anything. That 2-foot-long 2"-diameter pipe running up the middle is the MONSTER vapor generator, so it could probably run on coal tar, if you could get it to flow up there. It's really only meant to burn gas/avgas/mogas, and I've only burned gas, but it does fine with soured/contaminated/oil-mix gas. I've used it MANY times to brew beer because it's so adjustable, but I've also used it to remove paint from cast iron & cast Aluminum parts.

The scrap of stainless on the corner is the slot-cleaning tool.

This the burner unit for an army field oven. It runs on gasoline, or just about any flammable liquid. The large generator over the burner allows it to vaporize almost anything for a VERY clean & efficient burn, but it takes a LONG time to heat up to operating temperature because it's packed with screen. To minimize startup time, as soon as the unit is shut down, stand it up like this, but with the controls DOWN to prevent the cooling generator from sucking up more liquid fuel from the tank.

This the burner unit for an army field oven. It runs on gasoline, or just about any flammable liquid. The large generator over the burner allows it to vaporize almost anything for a VERY clean & efficient burn, but it takes a LONG time to heat up to operating temperature because it's packed with screen. To minimize startup time, as soon as the unit is shut down, stand it up like this (with the controls DOWN) to prevent the cooling generator from sucking up more liquid fuel from the tank.

This the burner unit for an army field oven. It runs on gasoline, or just about any flammable liquid. The large generator over the burner allows it to vaporize almost anything for a VERY clean & efficient burn, but it takes a LONG time to heat up to operating temperature because it's packed with screen. To minimize startup time, as soon as the unit is shut down, stand it up with the controls DOWN to prevent the cooling generator from sucking up more liquid fuel from the tank.

This the burner unit for an army field oven. It runs on gasoline, or just about any flammable liquid.

Those light bluish-gray stripes are flame fronts at a low setting. The large generator over the burner makes this a VERY efficient & clean-burning device. The yellow flames are from the overly-rich mixture coming into the burner from the center of the plenum.

With the air valve closed, it becomes very INefficient & sooty, and the flames turn bright yellow/orange.

This is at a slightly higher setting. The flames are almost invisible because they're so efficient. Very little energy is lost as light - it's all turning to heat. And there's no smoke, and almost no smell, despite the fact that I'm burning rancid gas.

This is an even higher setting. The teal-blue flames are slightly more-visible now.

Same setting as the PREVious pic, but I'm trying to catch a better angle.

Same setting as the PREVious 2 pics, but no flash.

It doesn't look very different because it's so efficient, but it's really putting out some heat. This is with the flame valve WIDE open & the air valve adjusted to match. It sounds like a jet engine - my friends nicknamed it "The Afterburner".

It's not very noticeable in the pic, but in addition to the bright teal-blue flames along each slot, there's also a larger flame standing about 2" above each arm of the burner.

I've brewed beer (that's the thick spill in the pan) & boiled crawfish on this burner, and I'm thinking about frying a turkey soon. I also use it to burn thick paint off cast iron & Aluminum parts.

It's not very noticeable in the pic, but in addition to the bright teal-blue flames along each slot, there's also a larger flame standing about 2" above each arm of the burner.