Gasoline welding gun - video

[Frank S]

A classic example of a video alone can be a poor representation of how to build something. ther is not even a single subtitle insert in the video explaining what is being performed or the componentry required. However, there is only one unknown in the entire video. You have a mounting surface a battery pack for the energy source an off the shelf DC converter for varying the voltage output. a small air pump some plastic tubing a couple of drink bottles and a venturi torch that draws outside air to increase the intensity of the flame. connect the batteries to the converter with a switch to disconnect plug the output of the air pump into the first bottle pushing the tubing to the bottom to create the bubbling of the volatile liquid, "in this instance most likely gasoline" the vapors created by the bubbling are carried via a tube into the bottom of the second bottle which is in all probability filled with water Since water serves as a flashback preventive measure. the blue substance is the only unknown but in this case I suspect it is nothing more than blue food coloring for visual effect. the pressure created by the air pump forces the vapors out through tube connected to the hose, the torch could be one of those found on the plastic butane torches like those used to light crack pipes or like I use to heat shrink tubing when making electrical connections. And now you have one person's opinion of how this seemingly 8th grade science class experiment could be made.
I much prefer the way Rick Sparger does his tool build explanations over a video any day