solar tracking system
Dr.Brainopus tee
A superb helicopter pilot displays the excellent flight characteristics of the German Messerschmitt-Bölkow-Blohm Bo 105 light twin-engine helicopter, posible thanks to her light construction, twin-engine design, and most importantly, her rotor head, made from a single titanium block, where her flexible rotos blades, made of reinforced-plastic glass-fiber composite material, are bolted to, enabling the design to withstand 3.5 positive G force and one negative.
Special thanks to baka2baka2baka2baka for the link!
Source.
Cell phones have advanced a lot in just a few years, but we’re still living in the age of portable battery packs and constantly searching for a free outlet at a coffee shop to recharge.
Now, computer scientists have a phone prototype that has no battery at all — instead, it gets its energy from ambient radio signals and light.
“We’ve built what we believe is the first functioning cellphone that consumes almost zero power,” Shyam Gollakota, an associate professor of computer science and engineering at the University of Washington, said in a release. Read more (7/6/17)
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