The aircraft noise prediction program (ANOPP) was used to predict the far-field noise characteristics of an L-1011 aircraft equipped with RB.211-524B engines. Actual flight noise was compared with noise predicted for the same operating and weather conditions. Correlation of predicted and measured results was very good in the aft quadrant of radiated noise. Predicted noise levels were significantly different from measured values in the forward quadrant because fan noise was predicted high. Since the major noise sources were fan and core, corrections are supplied to adjust ANOPP fan and core noise components so that the total predicted noise matches the measured L-1011 noise levels.

  • Corporate Authors:

    Lockheed-California Company

    2555 North Hollywood Way
    Burbank, CA  United States  91505
  • Authors:
    • Godby, L
  • Publication Date: 1979-10-25

Media Info

  • Pagination: 139 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00305659
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NASA-CR-159138, LR-29177
  • Contract Numbers: NAS1-15651
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM