NDLI: Noise measurements obtained during engineering evaluation of two-segment approaches in a 727-200 aircraft

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Noise measurements obtained during engineering evaluation of two-segment approaches in a 727-200 aircraft

Content Provider	NASA Technical Reports Server (NTRS)
Author	Glass, R. E. Tanner, C. S.
Copyright Year	1974
Description	A series of noise measurements were made during engineering evaluation tests of two-segment approaches in a 727-200 aircraft equipped with acoustically treated nacelles. A two-segment approach having a 6-degree upper glide slope angle intercepting the Instrument Landing System (ILS) 2.9-degree glide slope at an altitude of 690 feet gave a 5-EPNdB decrease in measured noise at distances greater than 3 nautical miles from the runway threshold when compared with a normal ILS approach. Several of the noise measurements were taken under adverse weather conditions which were outside the specified limits of FAR Part 36. This may introduce uncertainties into the data from several approaches.
File Size	1382654
Page Count	54
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19740007603
Archival Resource Key	ark:/13960/t0ns5hw0c
Language	English
Publisher Date	1974-01-21
Access Restriction	Open
Subject Keyword	Aircraft Acoustic Measurement Acoustic Properties Aerodynamic Configurations Aircraft Landing Noise Reduction Aircraft Noise Boeing 727 Aircraft Approach Control Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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