You limited your search to:

 Decade: 1930-1939
 Collection: National Advisory Committee for Aeronautics Collection
Aerodynamic characteristics of airfoils VI : continuation of reports nos. 93, 124, 182, 244, and 286

Aerodynamic characteristics of airfoils VI : continuation of reports nos. 93, 124, 182, 244, and 286

Date: January 1, 1930
Creator: unknown
Description: This collection of data on airfoils has been made from the published reports of a number of the leading aerodynamic laboratories of this country and Europe. The information which was originally expressed according to the different customs of the several laboratories is here presented in a uniform series of charts and tables suitable for use of designing engineers and for purposes of general reference. The authority for the results here presented is given as the name of the laboratory at which the experiments were conducted, with the size of the model, wind velocity, and year of test.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of twenty-four airfoils at high speeds

Aerodynamic characteristics of twenty-four airfoils at high speeds

Date: January 1, 1930
Creator: Brigg, L J & Dryden, H L
Description: The aerodynamic characteristics of 24 airfoils are given for speeds of 0.5, 0.65, 0.8, 0.95, and 1.08 times the speed of sound, as measured in an open-jet air stream 2 inches in diameter, using models of 1-inch chord. The 24 airfoils belong to four general groups. The first is the standard R. A. F. family in general use by the Army and Navy for propeller design, the members of the family differing only in thickness. This family is represented by nine members ranging in thickness from 0.04 to 0.20 inch. The second group consists of five members of the Clark Y family, the members of the family again differing only in thickness. The third group, comprising six members, is a second R. A. F. Family in which the position of the maximum ordinate is varied. Combined with two members of the first R.A.F. family, this group represents a variation of maximum ordinate position from 30 to 60 percent of the chord in two camber ratios, 0.08 and 0.16. The fourth group consists of three geometrical forms, a flat plate, a wedge, and a segment of a right circular cylinder. In addition one section used in the reed metal propeller was ...
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic theory and test of strut forms. Part I

Aerodynamic theory and test of strut forms. Part I

Date: January 1, 1930
Creator: Smith, R H
Description: This report presents the first part of a two part study made under this title. In this part the symmetrical inviscid flow about an empirical strut of high service merit is found by both the Rankine and the Joukowsky methods. The results can be made to agree as closely as wished. Theoretical stream surfaces as well as surfaces of constant speed and pressure in the fluid about the strut are found. The surface pressure computed from the two theories agrees well with the measured pressure on the fore part of the model but not so well on the after part. From the theoretical flow speed the surface friction is computed by an empirical formula. The drag integrated from the friction and measured pressure closely equals the whole measured drag. As the pressure drag and the whole drag are accurately determined, the friction formula also appears trustworthy for such fair shapes. (author).
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic theory and tests of strut forms. Part II

Aerodynamic theory and tests of strut forms. Part II

Date: January 1, 1930
Creator: Smith, R H
Description: This report presents the second of two studies under the same title. In this part five theoretical struts are developed from distributed sources and sinks and constructed for pressure and resistance tests in a wind tunnel. The surface pressures for symmetrical inviscid flow are computed for each strut from theory and compared with those found by experiment. The theoretical and experimental pressures are found to agree quantitatively near the bow, only qualitatively over the suction range, the experimental suctions being uniformly a little low, and not at all near the stern. This study is the strut sequel to Fuhrmann's research on airship forms, the one being a study in two dimensions, the other in three. A comparison of results indicates that the agreement between theory and experiment is somewhat better for bodies of revolution than for cylinders when both are shaped for slight resistance. The consistent deficiency of the experimental suctions which is found in the case of struts was not found in the case of airships, for which the experimental suctions were sometimes above sometimes below their theoretical values.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (15th).administrative report including Technical Reports nos. 309 to 336

Annual report of the National Advisory Committee for Aeronautics (15th).administrative report including Technical Reports nos. 309 to 336

Date: January 1, 1930
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Contributing Partner: UNT Libraries Government Documents Department
Coefficients of flow of standard nozzles

Coefficients of flow of standard nozzles

Date: January 1, 1930
Creator: Mueller, H & Peters, H
Description: We first undertook experiments with air, devoted principally to the investigation of the disturbances due to the differences in the nature of the flow to the nozzle. The difficulty of measuring the air, however, caused us to experiment with water. Due to the possibility of measuring the capacity of the container, this method was much more accurate than measuring with Pitot tobes.
Contributing Partner: UNT Libraries Government Documents Department
Collection of wind-tunnel data on commonly used wing sections

Collection of wind-tunnel data on commonly used wing sections

Date: January 1, 1930
Creator: Louden, F A
Description: This report groups in a uniform manner the aerodynamic properties of commonly used wing sections as determined from tests in various wind tunnels. The data have been collected from reports of a number of laboratories. Where necessary, transformation has been made to the absolute system of coefficients and tunnel wall interference corrections have been applied. Tables and graphs present the data in the various forms useful to the engineer in the selection of a wing section.
Contributing Partner: UNT Libraries Government Documents Department
Combating airplane fires

Combating airplane fires

Date: January 1, 1930
Creator: Brunat, Henri
Description: This report provides a summary of the important steps to be taken in combating airplane fires.
Contributing Partner: UNT Libraries Government Documents Department
Contribution to the study of normal burning in gaseous carbureted mixtures. Part I

Contribution to the study of normal burning in gaseous carbureted mixtures. Part I

Date: January 1, 1930
Creator: Duchene, M R
Description: In the present study it is proposed to provide an equipment permitting the study of the propagation of the region of reaction in mixtures of air and carbureted gases enclosed within a cylinder. Ignition is produced at the end of compression by an electric spark. With this apparatus it is proposed to determine: 1) the influence of the richness of the explosive mixture on the rate of flame propagation; 2) the influence of the degree of volumetric compression on one of the hydrocarbons; 3) the influence of the variation of initial temperature of the mixture before compression; 4) the influence of tetraethyl-lead on the propagation - notably on the formation of the explosive wave.
Contributing Partner: UNT Libraries Government Documents Department
Contribution to the study of normal burning in gaseous carbureted mixtures.  Part II

Contribution to the study of normal burning in gaseous carbureted mixtures. Part II

Date: January 1, 1930
Creator: Duchene, M R
Description: Results of the investigations described in the previous report are presented and conclusions are drawn.
Contributing Partner: UNT Libraries Government Documents Department
FIRST PREV 1 2 3 4 5 NEXT LAST