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Inhabitat's Week in Green: frozen energy, spray-on solar and the hydrogen peroxide helicopter
Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green. It was a big week for green transportation as San Francisco broke ground on its massive green-roofed Transbay Transit Center and unveiled plans to install 5,000 EV charging stations throughout the Bay Area. We were also wowed by several fun new forms of alternative transportation - a single-person helicopter that emits nothing but water vapor and a human-powered car that can go 30 MPH while driving uphill! It was also an exciting week for energy storage tech as New York prepared to power up the world's first grid-scale flywheel energy plant and researchers cracked the code on a new cryogenic energy storage system. We also showcased a plan for a ribbon-like solar field that unfurls over the desert and saw researchers unveil a transparent solar spray that can transform practically any surface into a sun-capturing source of energy. In other news, solar tech energized the arena of interior lighting as we showcased an adorable solar-powered table lamp and were dazzled by this set of folding OLED origami lights. Finally, a team of scientists blew our minds with this light-bending invisibility cloak made from gold-coated silk.
Dragonfly jet-powered helicopter runs on H2O2, shuns traditional tail rotors (video)
Your average whirleybird is driven by a big motor in the middle, spinning the blades one way and, as per Newton, rotating the body of the craft the other. A tail rotor counteracts the force, but a more efficient solution is to have the rotors power themselves, which is exactly how the Dragonfly DF1 works. It has tiny, hydrogen-peroxide jets on the blade tips, spinning them up without pushing the body of the helo in the other way -- though a small tail rotor is still needed to turn the craft. It's much like the tech that propelled James Bond toward his waiting DB5 in Thunderball, but unlike that jetpack this copter can fly for up to 50 minutes. It's the product of Swisscopter Americas and, while they've been playing with the DF1 for many moons now (demonstrated in a video below), the company is also working on the DF2 shown above, a rather more civilized version that seats two. The DF1 is certified for flight in the US, looks to be available for sale and, while no price is listed, they are said to be much more friendly to the environment than traditional helicopters. That'll surely add to the premium.
