fireworks

Happy Fourth of July!

From all of us at MAKE: Happy July 4th to all those celebrating American Independence Day. Please sear your dead things or tofu dogs with care and practice your pyrotechnics with all caution. Be safe, have fun.

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Color chemistry crayons

Color chemistry crayons

This is understandable, really, because the chemical composition of many crayons, even if you ignore the wax binder and just focus on the coloring, is extraordinarily complicated, containing many different pigments carefully blended to achieve just the right color. Even if the formulations weren’t trade secrets, it’d be doubtful if many of them could be fit on a crayon label in a legible typeface.

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Utterly Insane Sledgehammer Fireworks During Carnival

Utterly Insane Sledgehammer Fireworks During Carnival

This has to be the craziest DIY town fireworks celebrations ever!

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Rocket fuel from aluminum and ice

The key to the process is that the metallic aluminum is present as a nano-scale powder, and its oxidation by water thus occurs over a huge surface area and therefore proceeds very quickly, releasing amazing amounts of energy. The video starts with the acoustic mixing of the nano-aluminum with water to make a gray paste which is frozen, in a mold, to make a tubular rocket motor. It then proceeds through various test-bench firings and culminates (at 4:00) in the launch of an actual rocket using the mixture.

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