We built a vortex cannon that launches rings of air - no darts, no spitballs, no projectiles. The best part is seeing “invisible” power become visible as the air forms a clean moving ring. We test ...

This project was inspired by several things—like large vortex cannons used to disrupt hail and a WWII German design meant to bring down aircraft using fuel-ignited vortex rings (though it was never ...