XV-15 Tiltrotor Aircraft: 1997 Acoustic Testing PDF Download
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Author: Bryan D. Edwards
Publisher:
ISBN:
Category : Tilt rotor aircraft
Languages : en
Pages : 70
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Book Description
Author: Bryan D. Edwards
Publisher:
ISBN:
Category : Tilt rotor aircraft
Languages : en
Pages : 70
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721041121
Category :
Languages : en
Pages : 64
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Book Description
XV-15 acoustic test is discussed, and measured results are presented. The test was conducted by NASA Langley and Bell Helicopter Textron, Inc., during June - July 1997, at the BHTI test site near Waxahachie, Texas. This was the second in a series of three XV-15 tests to document the acoustic signature of the XV-15 tiltrotor aircraft for a variety of flight conditions and minimize the noise signature during approach. Tradeoffs between flight procedures and the measured noise are presented to illustrate the noise abatement flight procedures. The test objectives were to: (1) support operation of future tiltrotors by further developing and demonstrating low-noise flight profiles, while maintaining acceptable handling and ride qualities, and (2) refine approach profiles, selected from previous (1995) tiltrotor testing, to incorporate Instrument Flight Rules (IFR), handling qualities constraints, operations and tradeoffs with sound. Primary emphasis was given to the approach flight conditions where blade-vortex interaction (BVI) noise dominates, because this condition influences community noise impact more than any other. An understanding of this part of the noise generating process could guide the development of low noise flight operations and increase the tiltrotor's acceptance in the community.Edwards, Bryan D. and Conner, David A.Langley Research CenterXV-15 AIRCRAFT; AEROACOUSTICS; ROTOR DYNAMICS; ACOUSTIC PROPERTIES; NOISE MEASUREMENT; NOISE REDUCTION; ROTARY WINGS; BLADE-VORTEX INTERACTION; LOW NOISE; BLADE SLAP NOISE
Author: Martin D. Maisel
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 222
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Book Description
Author: Jiří Čečrdle
Publisher: Elsevier
ISBN: 0323955568
Category : Technology & Engineering
Languages : en
Pages : 378
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Book Description
Whirl Flutter of Turboprop Aircraft Structures, Second Edition explores the whirl flutter phenomenon, including theoretical, practical, analytical and experimental aspects of the matter. Sections provide a general overview regarding aeroelasticity, discussions on the physical principle and the occurrence of whirl flutter in aerospace practice, and experimental research conducted, especially from the 60s. Other chapters delve into analytical methods such as basic and advanced linear models, non-linear and CFD based methods, certification issues including regulation requirements, a description of possible certification approaches, and several examples of aircraft certification from aerospace. Finally, a database of relevant books, reports and papers is provided. This updated and expanded second edition covers new chapters including both analytical and experimental aspects of the subject matter. - Provides complex information on turboprop aircraft whirl flutter phenomenon - Presents both theoretical and practical (certification related) issues - Includes experimental research as well as analytical models (basic and advanced) of matter - Includes both early-performed works and recent developments - Contains a listing of relevant books and reports
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent Agencies
Publisher:
ISBN:
Category : History
Languages : en
Pages : 1048
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Author: American Helicopter Society
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 316
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1042
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1126
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 458
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Book Description
