Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 74
Book Description
Noise Standards, Small Propeller Aircraft
Author: Measured Or Estimated (uncertificated) Airplane Noise Levels
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 44
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
Noise Levels and Data Analyses for Small Prop-Driven Aircraft
Author: J. Steven NewmanPublisher:
ISBN:
Category :
Languages : en
Pages : 193
Book Description
During the Summer and Fall of 1982, the FAA Office of Environment and Energy, Noise Abatement Division, conducted a noise measurement program to evaluate proposed revisions of International and U.S. noise certification standards for light-weight propeller-driven aircraft. Tests were conducted using both single- and twin-engine propeller-driven light aircraft. Normally aspirated, turbo-charged, and turboprop engines were included, as were both fixed and variable pitch propellers. Takeoff noise measurements were made for eighteen aircraft. Additional measurements for nine of these aircraft (during level flight) provided sufficient data to examine the relationship of noise level versus helical tip Mach Number and engine power setting. This report presents noise measurements, aircraft position data, meteorological data, and cockpit instrument readings acquired during the test. Data analyses include: corrections to proposed noise certification reference conditions, development of Mach Number and Power Correction functions, empirical examination of sound propagation, regression of noise level versus weight (and the logarithm of weight) and correlation of acoustical intensity (AL) and acoustical dose (SEL) noise metrics. While this report concludes that a takeoff noise certification procedure is feasible and will provide consistent results for a given aircraft, it remains uncertain whether or not equal stringency (or even comparable stringency) can be achieved between the existing certification procedure and the proposed takeoff procedure.
Federal Aviation Regulations
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 24
Book Description
Proposed Noise Standards, Propeller-driven Small Planes
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 112
Book Description
Recommended Notice of Proposed Rulemaking on Noise Levels for Turbojet Powered Airplanes and Large Propeller Driven Airplanes
Author: United States. Environmental Protection AgencyPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
Book Description
Evaluation of Noise Control Technology and Alternative Noise Certification Procedures for Propeller-Driven Small Airplanes
Author: David BrownPublisher:
ISBN:
Category :
Languages : en
Pages : 224
Book Description
This report considers the effectiveness of current noise regulations in Appendix F of FAR Part 36, examines the potential effectiveness of future technology to achieve further noise reduction, and evaluates a number of new concepts for noise certification procedures for propeller-driven small aircraft. The latter were based, in part, on results of a flight test program carried out with Cessna Aircraft Company, to evaluate the utility of takeoff noise tests and the possible use of sound exposure level as a suitable metric for noise certification of the subject aircraft. The study indicates that existing regulations have been effective in stimulating development of quieter propellers for the existing fleet of propeller-driven small aircraft. However, it does not appear economically feasible to achieve more noise reduction in most of this fleet using existing technology with the possible exceptions of some of the two-engine aircraft. However, application of future noise reduction technology, primarily for quieter propellers, should allow a reduction in current noise limits by about 6 dB and should reduce levels of the noisiest aircraft in the current fleet by as much as 10 dB. A takeoff test is appropriate for all propeller aircraft except those equipped with cruise-optimized fixed-pitch propellers. For this test, the current level flyover test appears to represent the noisiest operating condition.
Noise Levels and Data Correction Analysis for Seven General Aviation Propeller Aircraft
Author: David W. FordPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 396
Book Description
Noise Standards for Aircraft Type Certification (modification to FAR Part 36).
Author: United States. Office of Noise Abatement and ControlPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 312
Book Description