When Ed Nauman fires his oxygen-propane cannon, anybody within range of the shock wave will definitely see stars. It's been known to shatter windows 30 ft to the rear! Propane is mixed with oxygen under control of a PIC microcontroller, in a barrel made from a 330 ft³ nitrogen tank and detonated by remote control. It's even instrumented to measure the kaboom — he's recorded 180 dB SPL (think two sticks of dynamite). Gadget Freaks, don't try this near your home (or your neighbor's)!
Researchers have been working on a number of alternative chemistries to lithium-ion for next-gen batteries, silicon-air among them. However, while the technology has been viewed as promising and cost-effective, to date researchers haven’t managed to develop a battery of this chemistry with a viable running time -- until now.
Norway-based additive manufacturing company Norsk Titanium is building what it says is the first industrial-scale 3D printing plant in the world for making aerospace-grade metal components. The New York state plant will produce 400 metric tons each year of aerospace-grade, structural titanium parts.
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