Air cannons to prevent hail storms

Photo from Eggers Hail Cannons.

Hail cannons look cool and make loud booming noises, even though some people say they don't prevent hail. Maybe we should run an article in MAKE on how to make one for recreational purposes?

From Nacken:

This weekend we went to the Roero wine area and after a loooong lunch we sat with friends outside and looked fearfully at the looming, darker growing clouds.

When suddenly we heard a loud boom in the distance. Followed by more booms closer by … and within minutes it sounded like we were in the middle of a WW1 battlefield. Listen to the sound (while enjoying the lovely hill side panorama) in the ... video.

The Mysterious Air Cannons of Roero (solved)