Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722043780
Category :
Languages : en
Pages : 42
Book Description
This paper presents the test design, instrumentation set-up, data acquisition, and the results of an acoustic flight experiment to study how noise due to blade-vortex interaction (BVI) may be alleviated. The flight experiment was conducted using the NASA/Army Rotorcraft Aircrew Systems Concepts Airborne Laboratory (RASCAL) research helicopter. A Local Differential Global Positioning System (LDGPS) was used for precision navigation and cockpit display guidance. A laser-based rotor state measurement system on board the aircraft was used to measure the main rotor tip-path-plane angle-of-attack. Tests were performed at Crows Landing Airfield in northern California with an array of microphones similar to that used in the standard ICAO/FAA noise certification test. The methodology used in the design of a RASCAL-specific, multi-segment, decelerating approach profile for BVI noise abatement is described, and the flight data pertaining to the flight technical errors and the acoustic data for assessing the noise reduction effectiveness are reported. Chen, Robert T. N. and Hindson, William S. and Mueller, Arnold W. Ames Research Center RTOP 505-59-36...
Acoustic Flight Tests of Rotorcraft Noise-Abatement Approaches Using Local Differential GPS Guidance
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722043780
Category :
Languages : en
Pages : 42
Book Description
This paper presents the test design, instrumentation set-up, data acquisition, and the results of an acoustic flight experiment to study how noise due to blade-vortex interaction (BVI) may be alleviated. The flight experiment was conducted using the NASA/Army Rotorcraft Aircrew Systems Concepts Airborne Laboratory (RASCAL) research helicopter. A Local Differential Global Positioning System (LDGPS) was used for precision navigation and cockpit display guidance. A laser-based rotor state measurement system on board the aircraft was used to measure the main rotor tip-path-plane angle-of-attack. Tests were performed at Crows Landing Airfield in northern California with an array of microphones similar to that used in the standard ICAO/FAA noise certification test. The methodology used in the design of a RASCAL-specific, multi-segment, decelerating approach profile for BVI noise abatement is described, and the flight data pertaining to the flight technical errors and the acoustic data for assessing the noise reduction effectiveness are reported. Chen, Robert T. N. and Hindson, William S. and Mueller, Arnold W. Ames Research Center RTOP 505-59-36...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722043780
Category :
Languages : en
Pages : 42
Book Description
This paper presents the test design, instrumentation set-up, data acquisition, and the results of an acoustic flight experiment to study how noise due to blade-vortex interaction (BVI) may be alleviated. The flight experiment was conducted using the NASA/Army Rotorcraft Aircrew Systems Concepts Airborne Laboratory (RASCAL) research helicopter. A Local Differential Global Positioning System (LDGPS) was used for precision navigation and cockpit display guidance. A laser-based rotor state measurement system on board the aircraft was used to measure the main rotor tip-path-plane angle-of-attack. Tests were performed at Crows Landing Airfield in northern California with an array of microphones similar to that used in the standard ICAO/FAA noise certification test. The methodology used in the design of a RASCAL-specific, multi-segment, decelerating approach profile for BVI noise abatement is described, and the flight data pertaining to the flight technical errors and the acoustic data for assessing the noise reduction effectiveness are reported. Chen, Robert T. N. and Hindson, William S. and Mueller, Arnold W. Ames Research Center RTOP 505-59-36...
Acoustic Flight Tests of Rotorcraft Noise-abatement Approaches Using Local Differential GPS Guidance
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
NASA Technical Memorandum
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 176
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 176
Book Description
NASA's Contributions to Aeronautics
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
NASA's Contributions to Aeronautics: Flight environment, operations, flight testing, and research
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1064
Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1064
Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
NASA's Contributions to Aeronautics, Volume 2, Flight Environment ..., NASA/SP-2010-570-Vol 2, 2010, *
Author:
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ISBN:
Category :
Languages : en
Pages : 1070
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1070
Book Description
International Aerospace Abstracts
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
NASA's Contributions to Aeronautics: Aerodynamics, structures, propulsion, controls
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Aeromechanics Technology & Product Design for the 21st Century
Author:
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Category : Helicopters
Languages : en
Pages : 434
Book Description
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 434
Book Description
Reduction of Blade-Vortex Interaction (BVI) Noise Through X-force Control
Author: Fredric H. Schmitz
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description