Disney Goes Boom!

BoomZilla writes "Reading Disney's alliteratively titled Practically Perfect Pyrotechnics introduces the latest in firework launch technology. Gone are the 'light blue touch paper and retire a safe distance' days. Shells are now launched using compressed air. No burning black powder means no smoke drifting over the residential neighborhoods, plus a safer show. Best of all the new system is more precise and can launch shells higher than black powder, enabling spectacular new effects. An additional article: The future of theme park fireworks covers some of the pros and cons of compressed air launch systems." We mentioned this earlier.

Comments

Re:Change is Bad! Very Bad!

[jnaujok]

A typical 8" shell weighs about 3 pounds, of which about 1 ounce is the lift charge. Most of the weight comes from the shell casing (pressed glued paper) that holds the burst charge and the stars and keeps them together long enough for the stars to ignite when the timing fuse burns through to the burst charge. Disney is probably using 4" shells for most of their stuff, so figure a pound of shell with a tablespoon of lift charge.

For reference, the largest shell ever fired (the 36" Fat Man) weighed 800 pounds and was lifted 1400 feet in the air by 1/2 pound of black powder.