Blog Posts

segunda-feira, 4 de julho de 2011

Turbina estática, e Minério pronto a colher!

O nosso amigo Brazilero2008, volta a marcar presença no mundo Engenhocas, com esta Turbina Electrostática:

 Tem Vídeo:

Uma caixa de 3 Mudanças para Veículos Eléctricos:

Antonov's 3-speed transmission for electric vehicles boosts efficiency by 15 percent

By Noel McKeegan

Electric vehicles have been a reality for more than 100 years, but it's only in the last decade or so that the world has truly woken up to their potential as a viable, cleaner urban transport alternative to their combustion engined cousins. During this EV renaissance much of the focus has been on developing improved power sources like batteries and fuel cells in order to deliver the range and performance consumers have become accustomed to during the age of oil. Transmissions on the other hand, despite being so important in the ICE space, hardly rate a mention because the wide torque curve of electric motors makes them largely irrelevant. It could be time to rethink that approach according to U.K. based engineering firm Antonov. The company has produced a 3-speed transmission designed specifically for electric vehicles

...E Terras raras, (minérios) no fundo do Pacífico, à mão de minerar!

Huge rare earth deposits found in Pacific: Japan experts
(Reuters) - Vast deposits of rare earth minerals, crucial in making high-tech electronics products, have been found on the floor of the Pacific Ocean and can be readily extracted, Japanese scientists said on Monday.

"The deposits have a heavy concentration of rare earths. Just one square kilometer (0.4 square mile) of deposits will be able to provide one-fifth of the current global annual consumption," said Yasuhiro Kato, an associate professor of earth science at the University of Tokyo.

The discovery was made by a team led by Kato and including researchers from the Japan Agency for Marine-Earth Science and Technology.

They found the minerals in sea mud extracted from depths of 3,500 to 6,000 meters (11,500-20,000 ft) below the ocean surface at 78 locations. One-third of the sites yielded rich contents of rare earths and the metal yttrium, Kato said in a telephone interview.

Viram o Iron Man? Eis algo mais Terra-a-terra, o Hulc...

HULC robotic exoskeleton undergoing biomechanical testing with the U.S. Army

By Darren Quick

Following lab evaluation tests, Lockheed Martin's ruggedized HULC (Human Universal Load Carrier) robotic exoskeleton is now undergoing biomechanical testing at the U.S. Army Natick Soldier Research, Development and Engineering Center in Natick, Massachusetts. The biomechanical testing will assess the effectiveness of the HULC in improving the endurance and reducing the risk of injury to soldiers by comparing the performance of soldiers carrying identical loads, both with and without the device.

The testing will measure changes in energy expended by users to assess how quickly individuals acclimatize to the system and whether there is a reduction in metabolic cost. By measuring oxygen consumption per total unit of mass, the tests will determine if there is any improvement in metabolic efficiency with subjects placed under identical load, speed, grade and duration conditions.

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