Dispersion strengthened copper-thorium boride and copper-alumina alloys produced by melting and casting /

Photocopy. U.S. Dept. of Commerce, Office of Technical Services. AD606806.

Coupled thermal, structural and vibrational analysis of a hypersonic engine for flight test

This paper describes a relatively simple and quick method for implementing aerodynamic heating models into a finite element code for non-linear transient thermal-structural and thermal-structural-vibrational analyses of a Mach 10 generic HyShot scramjet engine. The thermal-structural-vibrational response of the engine was studied for the descent trajectory from 60 to 26 km. Aerodynamic heating fluxes, as a function of spatial position and time for varying trajectory points, were implemented in the transient heat analysis. Additionally, the combined effect of varying dynamic pressure and thermal loads with altitude was considered. This aero-thermal-structural analysis capability was used to assess the temperature distribution, engine geometry distortion and yielding of the structural material due to aerodynamic heating during the descent trajectory, and for optimising the wall thickness, nose radius of leading edge, etc. of the engine intake. A structural vibration analysis was also performed following the aero-thermal-structural analysis to determine the changes in natural frequencies of the structural vibration modes that occur at the various temperatures associated with the descent trajectory. This analysis provides a unique and relatively simple design strategy for predicting and mitigating the thermal-structural-vibrational response of hypersonic engines. (C) 2006 Elsevier SAS. All rights reserved.

The effects of relocation on Royal Air Force families

This doctoral research project examines the effects that geographical transience has on Royal Air Force families. The methodology employed in this exploratory and qualitative study consisted largely of open-ended interview questions but also included a series of demographic variables. In total, 29 RAF personnel without families, 33 RAF personnel with families, 33 RAF spouses, and 15 RAF children participated in this research (N = 110). All respondents volunteered to take part in the study and were based in the United Kingdom at the time of data collection. The interviews were transcribed and content coded according to six major relocation themes arising from the literature (change, tasks, support, coping, difficulty, and outcome). QSR NVIVO 2.0, a qualitative data analysis software package, was used to facilitate the process. Through the utilisations of qualitative methodology, the researcher was able to offer various novel and reoccurring variables that appear to play an important role (at least subjectively) in relocation. Additionally, frequencies associated with these factors were presented. The findings were integrated with those from the literature in order to offer an initial comparison and differentiation between civilian and military samples. The main theoretical contributions were the introduction of the concept of mobile mentality, the creation of a novel relocation model that takes familial interaction into account, and the development of a taxonomy for the classification of relocation outcomes. Finally, additional observations, recommendations for future research, and practical implications are reviewed.

World War II Air Force plaque

General note: Title and date provided by Bettye Lane.

The Amplifier - v. 7, no. 8

in this issue...Sweetheart Swirl Dance, R J Trio, Air Force Base, Civil Rights, Bill Barry's Boxing Club, International Club, Donald E. Mahagin, Main Hall

Tactics : a Soviet view /

Mode of access: Internet.

Compendium of authenticated systems and logistics terms, definitions, and acronyms.

"AU-AFIT-LS-3-81."

An analytical and experimental study of the ionized flow field about a hemisphere cylinder and its effect on the radiation pattern of a slot antenna

Mode of access: Internet.

Hypersonic dynamic stability.

pt. 1. Summary [by] L. A. Marshall.--pt. 2. Conical body experimental program [by] R. B. Hobbs, Jr.--pt. 3. Unsteady flow field program [by] H. Rie, E. A. Linkiewicz [and] F. D. Bosworth.

The Aerothermodynamics of aircraft gas turbine engines /

Photocopy. [Springfield, Va. : National Technical Information Service, 1978]. -- 2 v.

R2D2 : a Fortran program for two-dimensional chemically reacting, hyperthermal, internal flows.

"January 1980."

Technical guidelines for energy conservation : final report for period December 1975 to March 1977.

"Technical portion of a two-report Energy Conservation effort prepared by the staff of the Center for Building Technology of the National Bureau of Standards (NBS) for the Air Force Civil Engineering Center (AFCEC), Tyndall AFB, Florida."

Investigation of chemical kinetics phenomena in rocket engines.

"Unclassified."

Proceedings of the Workshop on Methods of Obtaining Winds and Densities from Radar Meteor Trail Returns : held at the Charter House Motor Hotel, Waltham, Massachusetts, 16-19 August 1966 /

At head of title: Meteorology Laboratory, Project 8628.

Bibliography on the theory of diffraction and propagation of radio waves

"ASTIA document no. AD 117044."