Boeing & NASA makes 'quiet' advances

  • NASA
  • Thread starter kach22i
  • Start date
  • #1
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FYI:

Boeing makes 'quiet' advances
Noise-reduction efforts pay off at remote airfield in Montana

By JAMES WALLACE
SEATTLE POST-INTELLIGENCER AEROSPACE REPORTER

http://seattlepi.nwsource.com/business/236095_quietjet11.html [Broken]
During tests at the Glasgow site with a 777 in 2001, Boeing found that two engines equipped with chevrons made no more noise than a single engine without the chevron.

Photo Caption:
Technology being tested on this Boeing 777 in Montana is expected to find its way into 787s, due to enter service in 2008, and the 747 Advanced. (August 11, 2005)

Credit: James Wallace/Seattle Post-Intelligencer
 

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Answers and Replies

  • #3
minger
Science Advisor
1,496
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It's not as simple as they say. If you look at the actual research, many different chevon styles and configurations were used. Some produced 'more' noise than baseline, some produced the same, some produced less.
 
  • #4
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It's not as simple as they say. If you look at the actual research, many different chevon styles and configurations were used. Some produced 'more' noise than baseline, some produced the same, some produced less.
Please provide a link to that reseach if possible.

This link looks interesting, lots of pretty charts and pictures.

http://adg.stanford.edu/aa241/noise/noise.html
 
  • #5
minger
Science Advisor
1,496
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My graduate adviser works at Glenn. He's been keeping us up to date on this work. I don't have any raw data, just what he's been telling us.

From what he says though, the results are very interesting and many times unexpected.
 
  • #6
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Don't get anyone fired.
 
  • #7
FredGarvin
Science Advisor
5,067
10
Coincidentally, I will be at the very same facility tomorrow for some of the same testing we are going to be undertaking.
 
  • #8
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Coincidentally, I will be at the very same facility tomorrow for some of the same testing we are going to be undertaking.

I'm guessing they will make you check in your camera phone at the front desk.:cool:
 

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