Propeller-noise Charts for Transport Airplanes PDF Download
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Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Charts, diagrams, etc
Languages : en
Pages : 2
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Book Description
Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Charts, diagrams, etc
Languages : en
Pages : 2
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Book Description
Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Charts, diagrams, etc
Languages : en
Pages : 47
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Book Description
It is emphasized that, if noise reductions are to be obtained or if present noise levels are to be maintained for higher power ratings, future propeller designs should operate at lower tip Mach numbers are currently being used. Single- rather than dual-rotating propellers were found to generate the lowest over-all noise levels for a given number of blades.
Author: Jean Gilman
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 70
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Book Description
The preliminary selection of a propeller on the basis of cruising and take-off performance for application to transport airplanes at flight Mach numbers up to 0.8 can be accomplished by the use of the charts and methods presented. The charts are of sufficient scope to permit a fairly rapid evaluation of the propeller performance for engine power ratings of 1,000 to 10,000 horsepower. The method is presented primarily in the interest of propeller-noise abatement.
Author: United States. Environmental Protection Agency
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 84
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Book Description
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1026
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Book Description
Author: United States. Federal Aviation Administration
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 44
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Book Description
Author: Max C. Kurbjun
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 686
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Book Description
Theoretical calculations of the sound-pressure levels by the method of NACA TN 2968 predict accurately, for the 10-foot propeller investigated, the location of and the maximum levels to be expected for the overall noise and the first two propeller harmonics. The calculations do not predict accurately the location of the maximum sound-pressure levels ad the maximum calculated levels are 10 and 13 decibels lower than the msximm messured levels for the third and fourth harmonics, respectively.
Author: David W. Ford
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 396
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 260
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Author: United States. Office of Noise Abatement
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 88
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Book Description
