Active systems in helicopter rotor blades can adapt the blades' aerodynamic properties to local airflow conditions. The use of such systems leads to lower fuel consumption, increased maximum speed and reduced noise and vibration. ...
Mar 06, 2013
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(Phys.org)—This movie from NASA's Chandra X-ray Observatory shows a fast moving jet of particles produced by a rapidly rotating neutron star, and may provide new insight into the nature of some of the densest ...
Jan 08, 2013
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(PhysOrg.com) -- Whale researchers have known for some time that humpback whales are able to perform feats of underwater acrobatics that belie their huge size and that some of that ability is partly due to ...
Feb 01, 2012
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(PhysOrg.com) -- Normally, when a helicopter loses power in flight due to engine failure, the pilot reverts to using a technique called autorotation to avoid crashing. What happens is the rotors keep spinning ...
Oct 14, 2011
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(PhysOrg.com) -- "Smooth" and "quiet" are two words not usually associated with a helicopter ride, but NASA is working to change that. A full-size UH-60A Blackhawk helicopter rotor was the subject of tests ...
Jun 07, 2010
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A technology originally developed to increase lift in aircraft wings and simplify helicopter rotors may soon help reduce the cost of manufacturing and operating wind turbines used for generating electricity.
Jan 13, 2010
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