Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
XV-15 Structural-Acoustic Data
Author: XV-15 Structural-Acoustic Data
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722945183
Category :
Languages : en
Pages : 28
Book Description
Tiltrotor aircraft are a potentially viable means of intercity travel. The tiltrotor is able to transport passengers relatively quickly from the center of a city to destinations within a 300-mile radius. For such vehicles to be commercially viable, the interior noise and vibration levels must be acceptable to the passengers. A review of the literature revealed very little structural-acoustic data related to the tiltrotor. For this reason, structural-acoustic measurements were taken aboard an XV-15 tiltrotor. The six flight conditions included five in level flight, nominally 140-220 knots, for airplane mode (nacelle at 0 degrees) and one out-of-ground-effect (OGE) hover (nacelle at 90 degrees). The flight test measurements included nine exterior surface pressures, five structural accelerations, and two interior pressures. These sensors were located near the tip path plane on the port side of the aircraft. One minute of data was acquired at each condition. The data is presented as time histories, autospectra, coherence functions, and cross-spectra. In general, for level flight, the measured data showed very little effect of forward flight speed except to change the amplitude of the response; however, the character of the response was found to be dependent on spatial location. In contrast, in the hover mode the spatial location had very little effect on the character of the response. Additionally, the report highlights: the coherence between the transducer data and the rotor tach signal; and transfer function calculations between the exterior pressures. Lyle, Karen H. Langley Research Center RTOP 538-03-14-01...
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 728
Book Description
Scientific and Technical Aerospace Reports
Author: NASA Technical Memorandum
Author: The Shock and Vibration Digest
Author: Verti-flite
Author: Aeronautical Engineering
Author: Departments of Veterans Affairs and Housing and Urban Development, and Independent Agencies Appropriations for 1996
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent AgenciesPublisher:
ISBN:
Category : United States
Languages : en
Pages : 908
Book Description
Author: