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 ...

Helicopter safety researchers are to undertake formal analysis of the hazardous vortex ring phenomenon and the effectiveness of an alternative recovery and escape technique. The vortex ring state is ...

Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...