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Investigation of Flow Conditions and the Nature of the Wall-Constriction Effect Near and at Choking by Means of the Hydraulic Analogy

Description: Report presenting an investigation of the closed wind-tunnel phenomenon of choking and the wall-constriction effects in the subsonic Mach number range where supersonic Mach numbers appear using the hydraulic analogy. Application of the results to wind tunnel testing, the subsonic choking phenomena, and effects of the walls are described.
Date: September 1, 1948
Creator: Matthews, Clarence W. & Wright, Ray H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physics progress report

Description: This document is the September 1948 Physics Division Progress Report from the Mound Laboratory. Items discussed include: (1) measurement of the vapor pressure of Postum by the effusion method and the quartz-sickle method, (2) use of the vacuum balance, (3) measurement of the electric conductivity of Postum, (4) neutronics of several sources, and (5) x-ray diffraction studies of Thorium compounds.
Date: September 1, 1948
Creator: Haring, M. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Influence of Dimensional Modifications upon the Spin and Recovery Characteristics of a Tailless Airplane Model Having Its Wings Swept Forward 15 Degrees (Cornelius XFG-1)

Description: "An investigation has been conducted in the Langley 20-foot free- spinning tunnel scale model of the Cornelius XFG-1 glider, a tailless design having its wings swept forward 15 degrees. It was previously found to possess erratic spin and recovery characteristics, and tests were made to determine modifications which would lead to normal steady spins with consistently good recoveries. The results of the investigation indicated that modifications that aid not appreciably alter the basic design aid… more
Date: September 1, 1948
Creator: Stone, Ralph W., Jr. & Daughtridge, Lee T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electronics progress report

Description: The Argonne National Laboratory model of the Vibrating Reed Electrometer was installed in the laboratory of Group 3 to detect the point at which electrodeposition of a radioactive element begins. As now set up, the Vibrating Reed Electrometer has a direct reading sensitivity of 10{sup {minus}12} amperes and this can be increased to 10{sup {minus}17} amperes by using it as a rate of charge instrument. During the past month the ionization chamber was designed and constructed and the complete syst… more
Date: September 1, 1948
Creator: Heyd, J. W. & Ohmart, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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