Toy Rocket Inspires Design of Variable-Speed Bullets

Repurposing the design of a kid's toy rocket into an innovative gun may sound pretty dark, but it creates a weapon with selectable lethality. Rockets made by Lund and Company Invention of Chicago use a liquid hydrogen variable fuel-air mix to give a selectable-power launch, and now the US Army is funding research to… » 7/22/08 6:56am 7/22/08 6:56am