Recent Posts

Brain Teaser – An 8-inch model screw

An 8-inch model screw, tested in a water tunnel at a rotational speed of 22.5 revolutions per second and a velocity of flow of 12 feet per second, yields a measured thrust of 28.5 pounds, a torque of 3.45 pounds and an efficiency of 70 per cent. If the model …

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Wind energy installations increased in 2009

WASHINGTON, D.C. — The American Wind Energy Association (AWEA) announced that the wind industry broke all previous records by installing nearly 10,000 megawatts of new generating capacity in 2009. The installed capacity is enough to serve more than 2.4 million homes. However, despite the increase in installations, the industry still …

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