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Noise from propellers with symmetrical sections at zero blade angle, II

Noise from propellers with symmetrical sections at zero blade angle, II

Date: December 1, 1938
Creator: Deming, A F
Description: In a previous paper (Technical Note No. 605), a theory was developed that required an empirical relation to calculate sound pressures for the higher harmonics. Further investigation indicated that the modified theory agrees with experiment and that the empirical relation was due to an interference phenomenon peculiar to the test arrangement used. Comparison is made between the test results for a two-blade arrangement and the theory. The comparison is made for sound pressures in the plane of the revolving blades for varying values of tip velocity. Comparison is also made at constant tip velocity for all values of azimuth angle B. A further check is made between the theory and the experimental results for the fundamental of a four-blade arrangement with blades of the same dimensions as those used in the two-blade arrangement.
Contributing Partner: UNT Libraries Government Documents Department
Noise from two-blade propellers

Noise from two-blade propellers

Date: January 1, 1936
Creator: Stowell, E Z & Deming, A F
Description: The two-blade propeller, one of the most powerful sources of sound known, has been studied with the view of obtaining fundamental information concerning the noise emission. In order to eliminate engine noise, the propeller was mounted on an electric motor. A microphone was used to pick up the sound whose characteristics were studied electrically. The distribution of noise throughout the frequency range, as well as the spatial distribution about the propeller, was studied. The results are given in the form of polar diagrams. An appendix of common acoustical terms is included.
Contributing Partner: UNT Libraries Government Documents Department
Noise survey of a 10-foot four-blade turbine-driven propeller under static conditions

Noise survey of a 10-foot four-blade turbine-driven propeller under static conditions

Date: July 1, 1955
Creator: Kurbjun, Max C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Noise survey of a full-scale supersonic turbine-driven propeller under static conditions

Noise survey of a full-scale supersonic turbine-driven propeller under static conditions

Date: July 1, 1957
Creator: Kurbjun, Max C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Noise survey under static conditions of a turbine-driven full-scale modified supersonic propeller with an advance ratio of 3.2

Noise survey under static conditions of a turbine-driven full-scale modified supersonic propeller with an advance ratio of 3.2

Date: January 1, 1958
Creator: Kurbjun, Max C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Nomenclature for Aeronautics

Nomenclature for Aeronautics

Date: January 1, 1924
Creator: unknown
Description: This nomenclature for aeronautics was prepared by a special conference on aeronautical nomenclature by the Executive Committee of the National Advisory Committee for Aeronautics at a meeting held August 11, 1933. This publication supersedes all previous publications of the committee on this subject. The purpose of the committee in the preparation and publication of this report is to secure uniformity in the official documents of the government and, as far as possible, in technical and other commercial publications.
Contributing Partner: UNT Libraries Government Documents Department
Nomenclature for Aeronautics

Nomenclature for Aeronautics

Date: January 1, 1939
Creator: unknown
Description: The nomenclature for aeronautics presented in this Report No. 474 is a revision of the last previous report on this subject (i.e., Report no. 240.) This report is published for the purpose of encouraging greater uniformity and precision in the use of terms relating to aeronautics, both in official documents of the Government and in commercial publications. Terms in general use in other branches of engineering have been included only where they have some special significance in aeronautics, or form an integral part of its terminology.
Contributing Partner: UNT Libraries Government Documents Department
Nomenclature for aeronautics

Nomenclature for aeronautics

Date: January 1, 1921
Creator: unknown
Description: The purpose of the Committee in the preparation and publication of this report is to secure uniformity in the official documents of the government and, as far as possible, in technical and other commercial publications. This report supersedes all previous publications of the Committee on this subject.
Contributing Partner: UNT Libraries Government Documents Department
Nomenclature for aeronautics

Nomenclature for aeronautics

Date: January 1, 1923
Creator: unknown
Description: This nomenclature for aeronautics was prepared by a special conference on aeronautical nomenclature, composed of representatives of the Army and Navy Air Services, the Air Mail Service, the Bureau of Standards, the National Advisory Committee for Aeronautics, and private life. This report supersedes all previous publications of the committee on this subject. It is published with the intention of securing greater uniformity and accuracy in official documents of the government, and, as far as possible, in technical and other commercial publications. (author).
Contributing Partner: UNT Libraries Government Documents Department
Nomenclature for aeronautics

Nomenclature for aeronautics

Date: January 1, 1927
Creator: unknown
Description: This nomenclature for aeronautics was prepared by a Special Conference on Aeronautical Nomenclature by the executive committee of the National Advisory Committee for Aeronautics at a meeting held on August 19, 1924, at which meeting Dr. Joseph S. Ames was appointed chairman of the conference. The conference was composed of representatives of the National Advisory Committee for Aeronautics and specially appointed representatives officially designated by the Army Air Service, the Bureau of Aeronautics of the Navy Department, the Bureau of Standards, the American Society of Mechanical Engineers, the Society of Automotive Engineers, and the Aeronautical Chamber of Commerce. The purpose of the committee in the preparation and publication of this report is to secure uniformity in the official documents of the government and, as far as possible, in technical and other commercial publications.
Contributing Partner: UNT Libraries Government Documents Department