Visitors create "toroidal cloud" shapes by pushing a clear piston in the 42" diameter clear cannon. The air is accelerated as it exits through a small hole, resulting in an increase in velocity and concentration. This exhibit was designed and built by Hands On! and C.W. Shaw for the 'Cool Stuff' exhibition at Discovery Place in Charlotte, N.C.
Web: hofl.org
Flickr: flickr.com/photos/handsoninc/sets/

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