NASA Wants Planes Seen, Not Heard

AEROSPACE

Washington (UPI) Nov 21, 2005
NASA and three corporations have completed flight tests designed to help quiet jet aircraft noise, both in the passenger cabin and on the ground.

The program was a cooperative effort by NASA, Boeing, the Goodrich Corp., and GE Transportation Aircraft Engines. Japan's All Nippon Airways provided a 777 airplane for the tests.

"The team was pleased to see that concepts we had developed with computer simulations and in wind tunnels worked on a real airplane," said Charlotte Whitfield, NASA's Quiet Aircraft Technology manager of airframe system noise reduction.

During the three weeks of tests the plane was fitted with various noise reduction combinations, including landing gear and engine inlet-exhaust combinations.

Some new exhaust configurations achieved as much as a two-decibel improvement in noise. In addition, the low frequency rumble heard in the aft cabin by passengers at cruise altitude was reduced by as much as four to six decibels.

Another technology development that proved successful was a "seamless" sound-absorbing engine liner built by Goodrich, NASA said. It reduced the fan tones heard in front of the aircraft by up to 15 decibels, so they became nearly inaudible.

All rights reserved. � 2005 United Press International. Sections of the information displayed on this page (dispatches, photographs, logos) are protected by intellectual property rights owned by United Press International.. As a consequence, you may not copy, reproduce, modify, transmit, publish, display or in any way commercially exploit any of the content of this section without the prior written consent of United Press International.

AEROSPACE

DoD Orders Another $3 Billion Lot Of F/A-22 Raptors

Marietta GA (SPX) Nov 18, 2005
Lockheed Martin has been awarded a $2.9 billion fixed-price contract by the U.S. Air Force for continued production of F/A-22 aircraft through November 2007.

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.