IPFS News Link • Entertainment: Outdoor Recreation
Backyard Vortex Cannon Shoots Rings Of Fire
• popsci.comA vortex cannon is a simple device. With a flexible, airtight membrane on one end and a tapered opening on the other, a person can pull back on the cannon and send a surprise gust of air at an unsuspecting passerby. Here's what that gust looks like from a custom-built trash can-sized vortex cannon: