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On the Boundary Condition Between Two Multiplying Media

Description: The transition region between two parts of a pile which have different compositions is investigated. In the case where the moderator is the same in both parts of the pile, it is found that the diffusion constant times thermal neutron density plus diffusion constant times fast neutron density satisfied the use pile equations everywhere, right to the boundary. More complicated formulae apply in a more general case.
Date: April 19, 1944
Creator: Friedman, Francis L. (Francis Lee), 1918- & Wigner, Eugene Paul, 1902-1995
Item Type: Refine your search to only Report
open access

Summary of measurements in Langley full-scale tunnel of maximum lift coefficients and stalling characteristics of airplanes

Description: "The results of measurements in the Langley full-scale tunnel of the maximum lift coefficients and stalling characteristics of airplanes have been collected. The data have been analyzed to show the nature of the effects on maximum lift and stall of wing geometry, fuselages and nacelles, propeller slipstream, surface roughness, and wing leading-edge appendages such as ducts, armaments, tip slats, and airspeed heads. Comparisons of full-scale-tunnel and flight measurements of maximum lift and sta… more
Date: May 19, 1944
Creator: Sweberg, Harold H. & Dingeldein, Richard C.
Item Type: Refine your search to only Report
open access

Résumé of NACA Stability and Control Tests of the Bell P-63 Series Airplane

Description: Report on stability and control tests of the Bell P-63 series airplanes. Information about the spin characteristics, lateral control characteristics, longitudinal stability and control characteristics and directional stability and control characteristics is provided. A chronology of testing and detailed description of the airplane and its modifications are also provided.
Date: October 19, 1944
Creator: Johnson, Harold I.
Item Type: Refine your search to only Report
open access

The Effects of a Highly Cambered Low-Drag Wing and of Auxiliary Flaps on the High-Speed Aerodynamic Characteristics of a Twin-Engine Pursuit Airplane Model

Description: Results are presented for tests of two wings, an NACA 230-series wing and a highly-cambered NACA 66-series wing on a twin-engine pursuit airplane. Auxiliary control flaps were tested in combinations with each wing. Data showing comparison of high-speed aerodynamic characteristics of the model when equipped with each wing, the effect of the auxiliary control flaps on aerodynamic characteristics, and elevator effectiveness for the model with the 66-series wing are presented. High-speed aerodynami… more
Date: February 19, 1944
Creator: Ganzer, Victor M.
Item Type: Refine your search to only Report

Newsmap. For the Armed Forces. 249th week of the war, 131st week of U.S. participation

Description: Front: Text highlights action on various war fronts: France ; Italy ; Pacific ; Eastern Front ; Balkans. Inset maps: The advance beyond Rome ; Europe ; The Normandy coast ; China. Photographs: American assault troops move ashore in northern France ; Canadians with bicycles disembark from an infantry landing craft. Back: Map of Germany and adjacent areas shows railroads, superhighways, rivers, and mountains.
Date: June 19, 1944
Creator: [United States.] Army Service Forces. Army Information Branch.
Item Type: Refine your search to only Poster
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