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Two-stage supercharging

Description: The arrangement of the parts and the installation and control problems of the two-stage mechanically driven superchargers for aircraft engines are discussed. Unless an entirely new form of supercharging is developed, there will be a definite need for a two-stage centrifugal supercharger. It is shown that the two-stage mechanically driven supercharger itself is a comparatively simple device; the complications arise from the addition of inter-coolers and controls.
Date: February 1, 1941
Creator: Buck, Richard S
Item Type: Report

Ultimate Resisting Moments of Wood Poles Chart 2B

Description: Chart showing the ultimate resisting moments of wood poles based on the circumferences at ground line for different kinds of woods. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Date: August 7, 1944
Creator: United States. National Bureau of Standards.

Ultimate stresses developed by 24S-T sheet in incomplete diagonal tension

Description: Tests were made on 18 shear panels of 24S-T aluminum alloy to verify the dependence of the ultimate stress on the degree of development of the diagonal-tension field. Tests were made on two thicknesses of sheet with the sheet either clamped between the flange angle or riveted to the outside of the angles.
Date: December 1, 1941
Creator: Kuhn, Paul
Item Type: Report

A unified theory of plastic buckling of columns and plates

Description: On the basis of modern plasticity considerations, a unified theory of plastic buckling applicable to both columns and plates has been developed. For uniform compression, the theory shows that long columns which bend without appreciable twisting require the tangent modulus and that long flanges which twist without appreciable bending require the secant modulus. Structures that both bend and twist when they buckle require a modulus which is a combination of the secant modulus and the tangent modulus. (author).
Date: April 1, 1948
Creator: Stowell, Elbridge Z
Item Type: Report

A unified theory of plastic buckling of columns and plates

Description: On the basis of modern plasticity considerations, a unified theory of plastic buckling applicable to both columns and plates has been developed. For uniform compression, the theory shows that long columns which bend without appreciable twisting require the tangent modulus and that long flanges which twist without appreciable bending require the secant modulus. Structures that both bend and twist when they buckle require a modulus which is a combination of the secant modulus and the tangent modulus.
Date: January 1, 1948
Creator: Stowell, Elbridge Z
Item Type: Report

United States Earthquakes 1940

Description: Report discussing earthquake activity in the United States during 1940. The report is broken down by regions and has sections for specific earthquakes.
Date: 1940
Item Type: Report

United States Earthquakes 1941

Description: Report discussing earthquake activity in the United States during 1941. The report is broken down by regions and has sections for specific earthquakes.
Date: 1941
Item Type: Report

United States Earthquakes 1942

Description: Report discussing earthquake activity in the United States during 1942. The report is broken down by regions and has sections for specific earthquakes.
Date: 1942
Item Type: Report

United States Earthquakes, 1943

Description: Report discussing earthquake activity in the United States during 1943. The report is broken down by regions and has sections for specific earthquakes.
Date: 1943
Item Type: Report

United States Earthquakes, 1944

Description: Report discussing earthquake activity in the United States during 1944. The report is broken down by regions and has sections for specific earthquakes.
Date: 1944
Item Type: Report

United States Earthquakes, 1945

Description: Report discussing earthquake activity in the United States during 1945. The report is broken down by regions and has sections for specific earthquakes.
Date: 1945
Item Type: Report

United States Earthquakes, 1946

Description: Report discussing earthquake activity in the United States during 1946. The report is broken down by regions and has sections for specific earthquakes.
Date: 1946
Item Type: Report

United States Earthquakes, 1947

Description: Report discussing earthquake activity in the United States during 1947. The report is broken down by regions and has sections for specific earthquakes.
Date: 1947
Item Type: Report

United States Earthquakes, 1948

Description: Report discussing earthquake activity in the United States during 1948. The report is broken down by regions and has sections for specific earthquakes.
Date: 1948
Item Type: Report

United States Earthquakes, 1949

Description: Report discussing earthquake activity in the United States during 1949. The report is broken down by regions and has sections for specific earthquakes.
Date: 1949
Item Type: Report

The unsteady lift of a wing of finite aspect ratio

Description: Unsteady-lift functions for wings of finite aspect ratio have been calculated by correcting the aerodynamic inertia and the angle of attack of the infinite wing. The calculations are based on the operational method.
Date: January 1, 1940
Creator: Jones, Robert T
Item Type: Report