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|a (OCoLC)ocn680490610
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|a (OCoLC)680490610
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|a LHL
|b eng
|c LHL
|d OCLCF
|d OCLCO
|d OCLCQ
|d COD
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|a COD9
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|a Y 3.N 21/5:6/3516
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| 100 |
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|a North, Warren J.
|0 http://id.loc.gov/authorities/names/n86041687.
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| 245 |
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|a Summary evaluation of toothed-nozzle attachments as a jet-noise-suppression device /
|c Warren J. North.
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| 260 |
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|a Washington, D.C. :
|b National Advisory Committee for Aeronautics,
|c 1955.
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| 300 |
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|a 19 pages :
|b illustrations ;
|c 27 cm.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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| 337 |
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|a unmediated
|b n
|2 rdamedia.
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| 338 |
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|a volume
|b nc
|2 rdacarrier.
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| 490 |
1 |
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|a National Advisory Committee for Aeronautics ;
|v 3516.
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| 500 |
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|a "July 1955."
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| 500 |
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|a NACA TN Number 3516.
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| 504 |
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|a Includes bibliographical references.
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|a Toothed attachments to a full-scale turbojet nozzle were investigated for possible jet-noise reductions and thrust penalty. The attachments caused slight reductions in total sound power that are insignificant when evaluated in terms of engine thrust losses and aircraft payload penalty. At the reduced thrust levels obtained with the toothed nozzles, corresponding sound power reductions could be realized by throttleing the standard turbojet engine.
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|a Sound pressure levels were reduced behind the engine but were increased elsewhere. A typical resident in the airport neighborhood would hear increased loudness in the middle frequencies; however, the resulting overa-all auditory effect is considered to be negligible.
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|a committed to retain
|c 20230101
|d 20480101
|5 CoU
|f Alliance Shared Trust
|u https://www.coalliance.org/shared-print-archiving-policies.
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| 650 |
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|a Nozzles.
|0 http://id.loc.gov/authorities/subjects/sh85092916.
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| 650 |
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|a Jet engines.
|0 http://id.loc.gov/authorities/subjects/sh98000239.
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| 650 |
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|a Noise control.
|0 http://id.loc.gov/authorities/subjects/sh85092183.
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| 650 |
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|a Jet engines.
|2 fast
|0 (OCoLC)fst00982398.
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| 650 |
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7 |
|a Noise control.
|2 fast
|0 (OCoLC)fst01038383.
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| 650 |
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7 |
|a Nozzles.
|2 fast
|0 (OCoLC)fst01039825.
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|a United States.
|b National Advisory Committee for Aeronautics.
|0 http://id.loc.gov/authorities/names/n79060141
|1 http://isni.org/isni/0000000106642010.
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| 830 |
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|a Technical note (United States. National Advisory Committee for Aeronautics) ;
|v 3516.
|0 http://id.loc.gov/authorities/names/no2009017392.
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|b 08-13-20
|c 03-01-17
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|a .b90609001
|b 12-03-19
|c 03-01-17
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| 944 |
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|a MARS - RDA ENRICHED
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| 907 |
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|a .b90609001
|b 04-07-17
|c 03-01-17
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| 952 |
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|p Can circulate
|a University of Colorado Boulder
|b Boulder Campus
|c Offsite
|d PASCAL Offsite
|e Y 3.N 21/5:6/3516
|h Superintendent of Documents classification
|i document
|m P204082304045
|n 1
|
