Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 60
Book Description
Noise Certification Test and Analysis Procedures
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 60
Book Description
Noise Certification Test and Analysis Procedures
Author: Noise Certification Test and Analysis Procedures
Author: Noise Certification Handbook
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 76
Book Description
Analysis of Helicopter Noise Data Using International Helicopter Noise Certification Procedures
Author: J. S. NewmanPublisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
This report documents the results of a Federal Aviation Administration (FAA) noise measurement flight test program involving seven helicopters and establishes noise levels using the basic testing, reduction and analysis procedures specified by the International Civil Aviation Organization (ICAO) for helicopter noise certification supplemented with some procedural refinements contained in ICAO Working Group II recommendations for incorporation into the standard. The helicopters analyzed in this report include the Hughes 500 D/E, the Aerospatiale AS 350D (AStar), the Aerospatiale AS 355F (TwinStar), the Aerospatiale SA 365 (Dauphin), the Bell 222 Twin Jet, the Boeing Vertol 234/CH 47-D, and the Sikorsky S-76. The document discusses the evolution of international helicopter noise certification procedures and describes in detail the data acquisition, reduction and adjustment procedures. Noise levels are plotted versus the logarithm of maximum gross takeoff weight and are shown relative to the ICAO noise level limits. Data from the ICAO Committee on Aircraft Noise (CAN) Seventh meeting 'request for data' are also presented. Reference testing and operational data are provided for each helicopter. Keywords: Heliport environmental impact, Certification standards.
Environmental Technical Manual on the Use of Procedures in the Noise Certification of Aircraft
Author: International Civil Aviation OrganizationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 116
Book Description
Evaluation of Noise Control Technology and Alternative Noise Certification Procedures for Propeller-driven Small Airplanes
Author: David BrownPublisher:
ISBN:
Category : Airlines
Languages : en
Pages : 232
Book Description
Aircraft Exterior Noise Measurement and Analysis Techniques
Author: Hanno HellerPublisher:
ISBN: 9789283506126
Category : Airplanes
Languages : en
Pages : 174
Book Description
This volume describes testing and analysis techniques to measure aircraft noise primarily for purposes of noise certification as specified by the International Civil Aviation Organization. The relevant aircraft noise certification 'Standards' and 'Recommended Practices' are presented in detail for subsonic jet aeroplanes, for heavy and light propeller-driven aeroplanes and for helicopters. The practical execution of conducting noise certification tests is treated in depth. The characteristics and requirements of the acoustic and non-acoustic instrumentation for data acquisition and data processing are discussed, as are the procedures to determine the special noise measures 'Effective Perceived Noise Level' and 'Maximum Overall A-weighted Noise Level' that are required for the noise certification of different types of aircraft. The AGARDograph also contains an extensive -- although selective -- discussion of test and analysis techniques for more detailed aircraft noise studies by means of either flight experiments or full-scale and model-scale wind tunnel experiments.
Study of Noise-certification Standards for Aircraft Engines: Procedures for measuring far field sound pressure levels around an outdoor jet-engine test stand
Author: Alan H. MarshPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 98
Book Description
Noise Certification Predictions for Fjx-2-Powered Aircraft Using Analytic Methods
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781723998867
Category : Science
Languages : en
Pages : 38
Book Description
Williams International Co. is currently developing the 700-pound thrust class FJX-2 turbofan engine for the general Aviation Propulsion Program's Turbine Engine Element. As part of the 1996 NASA-Williams cooperative working agreement, NASA agreed to analytically calculate the noise certification levels of the FJX-2-powered V-Jet II test bed aircraft. Although the V-Jet II is a demonstration aircraft that is unlikely to be produced and certified, the noise results presented here may be considered to be representative of the noise levels of small, general aviation jet aircraft that the FJX-2 would power. A single engine variant of the V-Jet II, the V-Jet I concept airplane, is also considered. Reported in this paper are the analytically predicted FJX-2/V-Jet noise levels appropriate for Federal Aviation Regulation certification. Also reported are FJX-2/V-Jet noise levels using noise metrics appropriate for the propeller-driven aircraft that will be its major market competition, as well as a sensitivity analysis of the certification noise levels to major system uncertainties. Berton, Jeffrey J. Glenn Research Center NASA/TM-1999-208908, NAS 1.15:208908, E-11522