An amusing incidental use for this air injector is for a ‘spud gun’ or ‘potato cannon’. Jam the end of a 15 mm copper pipe into a potato then push the plug of potato down to the pressure end and ‘fire’.
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At 40 psi the potato is shot out the end fast. It still seemed to be travelling horizontally after 30 yards or so as it disappeared into the trees. When aimed vertically, flight time was 5 seconds. I will have to get out the ballistic pendulum to check the velocity. Other people have elevated spud guns to an art form. Recently, I needed a length of copper pipe to make a high current coaxial resistor so I removed about half the barrel length. This means that I now have a sawn-off spud gun!
Related pages
Try something else
Jacob’s Bi ladderExternal links
Spud Gun – Wikipedia
Spud gun legality – Wikipedia
Photo Date: 2004