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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Span load distribution on two monoplanes wing models as affected by twist and sweepback

Span load distribution on two monoplanes wing models as affected by twist and sweepback

Date: July 1, 1930
Creator: Knight, Montgomery & Noyes, Richard W
Description: The results presented in this note show the effect of twist and sweepback on the span load distribution over two monoplane wing models. The tests were made in the Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. The data are taken from the results of an investigation dealing primarily with lateral stability. As presented, they are suitable as an aid in the structural design of certain monoplane wings.
Contributing Partner: UNT Libraries Government Documents Department
Span load distribution resulting from constant vertical acceleration for thin sweptback tapered wings with streamwise tips

Span load distribution resulting from constant vertical acceleration for thin sweptback tapered wings with streamwise tips

Date: January 1, 1954
Creator: Cole, Isabella J & Margolis, Kenneth
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Span load distributions resulting from angle of attack, rolling, and pitching for tapered sweptback wings with streamwise tips

Span load distributions resulting from angle of attack, rolling, and pitching for tapered sweptback wings with streamwise tips

Date: July 1, 1952
Creator: Martin, John C & Jeffreys, Isabella
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Span load distributions resulting from constant angle of attack, steady rolling velocity, steady pitching velocity, and constant vertical acceleration for tapered sweptback wings with streamwise tips subsonic leading edges and supersonic trailing edg

Span load distributions resulting from constant angle of attack, steady rolling velocity, steady pitching velocity, and constant vertical acceleration for tapered sweptback wings with streamwise tips subsonic leading edges and supersonic trailing edg

Date: December 1, 1952
Creator: Hannah, Margery E & Margolis, Kenneth
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The spanwise distribution of lift for minimum induced drag of wings having a given lift and a given bending moment

The spanwise distribution of lift for minimum induced drag of wings having a given lift and a given bending moment

Date: December 1, 1950
Creator: Jones, R. T.
Description: The problem of the minimum induced drag of wings having a given lift and a given span is extended to include cases in which the bending moment to be supported by the wing is also given. The theory is limited to lifting surfaces traveling at subsonic speeds. It is found that the required shape of the downwash distribution can be obtained in an elementary way which is applicable to a variety of such problems. Expressions for the minimum drag and the corresponding spanwise load distributions are also given for the case in which the lift and the bending moment about the wing root are fixed while the span is allowed to vary. The results show a 15-percent reduction of the induced drag with a 15-percent increase in span as compared with results for an elliptically loaded wing having the same total lift and bending moment.
Contributing Partner: UNT Libraries Government Documents Department
The spanwise distribution of lift for minimum induced drag of wings having a given lift and a given bending moment

The spanwise distribution of lift for minimum induced drag of wings having a given lift and a given bending moment

Date: December 1, 1950
Creator: Jones, Robert Thomas
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spanwise loading for wings and control surfaces of low aspect ratio

Spanwise loading for wings and control surfaces of low aspect ratio

Date: January 1, 1950
Creator: Deyoung, John
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spark ignition of flowing gases

Spark ignition of flowing gases

Date: January 1, 1956
Creator: Swett, Clyde C , Jr
Description: Research conducted at the NACA Lewis Laboratory on ignition of flowing gases by means of long-duration discharges is summarized and analyzed. Data showing the effect of a flowing combustible mixture on the physical and electrical characteristics of spark discharges and data showing the effects of variables on the spark energy required for ignition that has been developed to predict the effect of many of the gas-stream and spark variables is described and applied to a limited amount of experimental data.
Contributing Partner: UNT Libraries Government Documents Department
Spark Ignition of Flowing Gases. 2: Effect of Electrode Parameters on Energy Required to Ignite a Propane-Air Mixture

Spark Ignition of Flowing Gases. 2: Effect of Electrode Parameters on Energy Required to Ignite a Propane-Air Mixture

Date: December 18, 1951
Creator: Swett, Clyde. C., Jr.
Description: Research was conducted to determine the effect of the electrode parameters of spacing, configuration, and material' on the energy required for ignition of a flowing propane-air mixture. In addition, the data were used to indicate the energy distribution along the spark length and to confirm previous observations concerning the effect of spark duration on ignition energy requirements. The data were obtained with a mixture at a fuel-air ratio of 0.0835 (by weight), a pressure of 3 inches of mercury absolute, a temperature of 80 F, and a mixture velocity of 5 feet per second. Results showed that the energy required for ignition decreased as the electrode spacing was increased; a minimum energy occurred at. a spacing of 0.65 inch for large electrodes. For small electrodes, the spacing for minimum energy was not sharply defined. Small-diameter electrodes required less energy than large-diameter electrodes if the spacing was less than the optimum distance of 0.65 inch; at a spacing equal to the optimum distance, no difference was noted. Significant effects of electrode material on ignition energy were ascribed to differences in the type of spark discharges produced; glow discharges required higher energy than the arc-glow discharges. With pure glow discharges, the ignition ...
Contributing Partner: UNT Libraries Government Documents Department
Spark ignition of flowing gases I : energies to ignite propane-air mixtures in pressure range of 2 to 4 inches mercury absolute

Spark ignition of flowing gases I : energies to ignite propane-air mixtures in pressure range of 2 to 4 inches mercury absolute

Date: August 4, 1949
Creator: Swett, Clyde C , Jr
Description: Ignition studies of flowing gases were made to obtain information applicable to ignition problems in gas-turbine and ram-jet aircraft propulsion systems operating at altitude conditions.Spark energies required for ignition of a flowing propane-air mixture were determined for pressure of 2 to 4 inches mercury absolute, gas velocities of 5.0 to 54.2 feet per second, fuel-air ratios of 0.0607 to 0.1245, and spark durations of 1.5 to 24,400 microseconds. The results showed that at a pressure of 3 inches mercury absolute the minimum energy required for ignition occurred at fuel-air ratios of 0.08 to 0.095. The energy required for ignition increased almost linearly with increasing gas velocity. Shortening the spark duration from approximately 25,000 to 125 microseconds decreased the amount of energy required for ignition. A spark produced by the discharge of a condenser directly into the spark gap and having a duration of 1.5 microseconds required ignition energies larger than most of the long-duration sparks.
Contributing Partner: UNT Libraries Government Documents Department