Cold Gun, Hilsch Tube, Vortex Tube

thingiverse

PLEASE USE THE FAR SUPERIOR DESIGN BY benkrasnow: https://www.thingiverse.com/thing:2965775 This is a Hilsch Tube based on the Scientific American article from 1958, preserved online at: http://www.visi.com/~darus/hilsch/ More information at another site:http://www.montagar.com/~patj/hilmnu.htm This is how cold guns work, but they are expensive for such a basic concept. This print has not been tested and the orifice size may need to be changed (sorry for the messy tree). Updated 9/21/14, Shortened version added which may work better and will take less time to print. Using the longer hot tube may be a good idea though. Also enlarged the cone on hot tube to create more restriction. Orifice and cone sizes still need tweaking in order for this to work well. Instructions Print (low infill, like 15-20%) and glue the hot tube to the swirl chamber. At 100% scale it will take 1/4" ID hose, at 150% scale it will take 3/8" ID hose. Air pressure would need to be high going in, 90-100 psi. Hopefully your print survives to this pressure! wear safety goggles!