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open access

A Feasibility Study of the Flare-Cylinder Configuration as a Reentry Body Shape for an Intermediate Range Ballistic Missile

Description: "A study has been made of a flare-cylinder configuration to investigate its feasibility as a reentry body of an intermediate range ballistic missile. Factors considered were heating, weight, stability, and impact velocity. A series of trajectories covering the possible range of weight-drag ratios were computed for simple truncated nose shapes of varying pointedness, and hence varying weight-drag ratios" (p. 1).
Date: May 28, 1958
Creator: Hall, James R. & Garland, Benjamine J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drag and Static Stability at Low Lift of Rocket-Powered Models of the Convair MX-1626 Airplane at Mach Numbers From 0.7 to 1.5

Description: Report presenting flight testing on models of the proposed Consolidated Vultee Aircraft Corporation MX-1626 airplane with nacelles and without nacelles. Results regarding drag level, design modifications, dampening, trimming, and the use of ventral boosters are provided.
Date: June 11, 1953
Creator: Hall, James R. & Hopko, Russell N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drag Measurements at Low Lift of a Four-Nacelle Airplane Configuration Having a Longitudinal Distribution of Cross-Sectional Area Conductive to Low Transonic Drag Rise

Description: Memorandum presenting a procedure based on the transonic area rule, which has been used to design a four-nacelle delta-wing airplane configuration. A flight test of a model of the configuration showed a zero-lift transonic drag rise of 0.010 which, when compared with estimates, indicated the absence of adverse interference effects.
Date: November 18, 1953
Creator: Hopko, Russell N.; Piland, Robert O. & Hall, James R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Nose Shape and Wing Thickness Ratio on the Drag at Zero Lift of a Missile Having Triangular Wings and Tails

Description: "Free-flight tests have been made to determine the drag at zero lift of several configurations of a missile having triangular wings and tails. Base-pressure measurements were also obtained for some of the configurations. The results show that increasing the wing thickness ratio from 4 to 6 percent increased the wing drag by about 100 percent at M = 1.3 and by about 30 percent at M = 1.8" (p. 1).
Date: May 31, 1950
Creator: Hall, James R. & Sandahl, Carl A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Free-Flight Investigation of the Longitudinal Stability and Control of a Rocket-Propelled Missile Model Having Cruciform, Triangular, Interdigitated Wings and Tails

Description: Report presenting flight testing of a missile model with cruciform, triangular, interdigitated wings and tails to determine the longitudinal stability and control characteristics over a range of Mach numbers. Results regarding static stability and damping, control effectiveness, and control hinge moments are provided.
Date: July 10, 1951
Creator: Sandahl, Carl A. & Hall, James R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Zero-Lift Drag of Several Configurations of the XAAM-N-2 Pilotless Aircraft, TED No. NACA DE332

Description: "Free-flight tests have been made to determine the zero-lift drag of several configurations of the XAAM-N-2 pilotless aircraft. Base-pressure measurements were also obtained for some of the configurations. The results show that increasing the wing-thickness ratio from 4 to 6 percent increased the wing drag by about 100 percent at M = 1.3 and by about 30 percent at M = 1.8. Increasing the nose fineness ratio from 5.00 to 6.25 reduced the drag coefficient of the wingless models a maximum of about… more
Date: March 16, 1950
Creator: Hall, James R. & Sandahl, Carl A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Free-flight investigation of longitudinal stability and control of a rocket-propelled missile model having cruciform, triangular, inline wings and tails

Description: Report presenting a rocket-propelled missile model with cruciform, triangular, inline wings and tails, which has been tested through a range of Mach numbers at small wing-deflection angles. Results regarding the stability and damping, control effectiveness, and hinge moments are provided.
Date: March 25, 1952
Creator: Hall, James R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drag Measurements at Low Lift of a Four-Nacelle Airplane Configuration Having a Longitudinal Distribution of Cross-Sectional Area Conducive to Low Transonic Drag Rise

Description: Report discussing a flight test of a four-nacelle delta-wing airplane configuration based on the transonic area rule in order to counteract the effects of high pressure drag at transonic and supersonic speeds. The testing verified that the transonic area rule can make designing complex aircraft with low transonic and supersonic pressure drag much easier.
Date: November 18, 1953
Creator: Hopko, Russell N.; Piland, Robert O. & Hall, James R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Limited heat-transfer, drag, and stability results from an investigation at Mach numbers up to 9 of a large rocket-propelled 10 degree cone

Description: Report presenting information on the heat transfer, drag, and stability of a large rocket-propelled 10 degree cone in a flight test. The location of turbulent flow was noted and the measured drag coefficients at several locations on the cone are provided.
Date: July 22, 1957
Creator: Hall, James R. & Speegle, Katherine C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Blood-Based Biomarkers: A blood screening test for Alzheimer's disease

Description: This article describes the first-ever multiethnic referent sample that spans community-based and clinic-based populations for implementation of an Alzheimer's disease blood screen.
Date: June 25, 2016
Creator: O'Bryant, Sid E.; Edwards, Melissa; Johnson, Leigh A.; Hall, James R.; Villarreal, Alcibiades E.; Britton, Gabrielle B. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Arsenic exposure, AS3MT polymorphism, and neuropsychological functioning among rural dwelling adults and elders: a cross-sectional study

Description: This article aims to examine the link between low-level arsenic exposure and cognitive functioning, and the potential role of a single nucleotide polymorphism (SNP A35991G, rs10748835) of the AS3MT gene in modifying this link.
Date: March 12, 2014
Creator: Edwards, Melissa; Hall, James R.; Gong, Gordon & O'Bryant, Sid E.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Comparing biological markers of Alzheimer’s disease across blood fraction and platforms: Comparing apples to oranges

Description: This article investigates the comparability of potential Alzheimer's disease (AD) biomarkers across blood fractions and assay platforms.
Date: December 29, 2015
Creator: O'Bryant, Sid E.; Lista, Simone; Rissman, Robert A.; Edwards, Melissa; Zhang, Fan; Hall, James R. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

A blood screening test for Alzheimer's disease

Description: Article describes study examining the positive and negative predictive values of an Alzheimer's disease (AD) blood test if implemented in primary care.
Date: June 25, 2016
Creator: O'Bryant, Sid E.; Edwards, Melissa; Johnson, Leigh A.; Hall, James R.; Villarreal, Alcibiades E.; Britton, Gabrielle B. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Molecular Markers of Neuropsychological Functioning and Alzheimer's Disease

Description: Article examines molecular markers of neuropsychological functioning among elders with and without Alzheimer's disease (AD) and determine the predictive ability of combined molecular markers and select neuropsychological tests in detecting disease presence. This work provides the foundation for the generation of a point‐of‐care device that can be used to screen for AD.
Date: March 1, 2015
Creator: Edwards, Melissa; Balldin, Valerie Hobson; Hall, James R. & O'Bryant, Sid E.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
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