Helicopter Main Rotor Speed Effects A Comparison Of Predicted Ranges Of Detection From The Aural Detection Program Ichin And The Electronic Detection Program Arcas PDF Download
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Author | : |
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Total Pages | : 20 |
Release | : 1991 |
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Download Helicopter Main-rotor Speed Effects: A Comparison of Predicted Ranges of Detection from the Aural Detection Program ICHIN and the Electronic Detection Program ARCAS Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Adm Nasa |
Publisher | : Independently Published |
Total Pages | : 32 |
Release | : 2018-12-31 |
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ISBN | : 9781792751509 |
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NASA LaRC personnel have conducted a strudy of the predicted acoustic detection ranges associated with reduced helicopter main rotor speeds. This was accomplished by providing identical input information to both the aural detection program ICHIN 6, (I Can Hear It Now, version 6) and the electronic acoustic detection program ARCAS (Assessment of Rotorcraft Detection by Acoustics Sensing). In this study, it was concluded that reducing the main rotor speed of the helicopter by 27 percent reduced both the predicted aural and electronic detection ranges by approximately 50 percent. Additionally, ARCAS was observed to function better with narrowband spectral input than with one-third octave band spectral inputs and the predicted electronic range of acoustic detection is greater than the predicted aural detection range. Mueller, Arnold W. and Smith, Charles D. Langley Research Center NASA-TM-104134, NAS 1.15:104134 RTOP 532-06-36-02...
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Total Pages | : 1572 |
Release | : 1992 |
Genre | : Aeronautics |
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Total Pages | : 1284 |
Release | : 1992 |
Genre | : Government publications |
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Total Pages | : 1228 |
Release | : 1992 |
Genre | : Government reports announcements & index |
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Total Pages | : 80 |
Release | : 1992 |
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Total Pages | : 596 |
Release | : 1992 |
Genre | : Government publications |
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Total Pages | : 1384 |
Release | : 1992 |
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Total Pages | : 712 |
Release | : 1993 |
Genre | : Aeronautics |
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A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
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Total Pages | : 706 |
Release | : 1993 |
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