Jam Jar Pulse Jet Concrete Mold

thingiverse

I've been experimenting with jam jar pulse jets and thought it would be exciting to combine a jam jar pulse jet with a Tesla valve. The uploaded files are different 3D printable molds you can use to cast a plaster or concrete model for testing. The design combines a Reynst jam jar with the circular Tesla valve by Bret, who did a great job on the circular Tesla valve design. For fuel, pour 5 to 10 ml of methanol or heat de-icer into the bottom and light it up. Here's a short video showing steps to make a functional jam jar pulse jet from a 3D print: <iframe width="560" height="315" src="https://www.youtube.com/embed/0pBrggAp6HQ" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> Changes: 4/19 ver_4 - updated the jam jar to a design from later Reynst geometry 4/17 ver_3 - changed Tesla valve intake runners to round pipe 4/16 ver_2 - reduced the intake area to match the exhaust nozzle area - print with exhaust nozzle on build plate - no mold cover, glue to bottom of Pringles can or something and fill to top of model with concrete 4/15 ver _1 - increased the distance between the mold cover and the jam jar for a thicker shell. - added radius to the air intake to make mold stronger when peeling off the build plate. If you enjoyed this project, be sure to check out my Griggs cavitation video. Feedback and likes are always welcome: <iframe width="560" height="315" src="https://www.youtube.com/embed/wAHNpCeGmDw" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>