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Aircraft towing feasibility study. Final report

Description: Energy costs and availability are major concerns in most parts of the world. Many ways of increasing energy supply and reducing consumption are being proposed and investigated. One that holds considerable promise is the extended towing of aircraft between airport runways and terminal gate areas with engines shut down. This study provides a preliminary assessment of the constraints on and feasibility of extended aircraft towing. Past aircraft towing experience and the state-of-the-art in towing … more
Date: September 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Airborne Dust Cloud Measurements at the INL National Security Test Range

Description: On July 11, 2007, a surface, high-explosive test (<20,000 lb TNT-equivalent) was carried out at the National Security Test Range (NSTR) on the Idaho National Laboratory (INL) Site. Aircraft-mounted rapid response (1-sec) particulate monitors were used to measure airborne PM-10 concentrations directly in the dust cloud and to develop a PM-10 emission factor that could be used for subsequent tests at the NSTR. The blast produced a mushroom-like dust cloud that rose approximately 2,500–3,000 ft ab… more
Date: September 1, 2007
Creator: Abbott, Michael L.; Stanley, Norm; Radke, Larry & Smeltzer, Charles
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General-Purpose Heat Source Development: Safety Verification Test Program. Flyer plate test series

Description: The General-Purpose Heat Source (GPHS) is a modular component of a radioisotope thermoelectric generator (RTG) that will provide electric power for space missions. The initial RTG applications will be for the NASA Galileo and the ESA Ulysses missions. Each of the 18 GPHS modules in an RTG contains four /sup 238/PuO/sub 2/-fueled clads and generates 250 W/sub (t)/. A series of Safety Verification Tests (SVTs) has been conducted to assess the ability of the GPHS fueled clads to contain the pluton… more
Date: September 1, 1986
Creator: Cull, T.A. & Pavone, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Department of Energy&#x27;s team&#x27;s analyses of Soviet designed VVERs

Description: This document provides Appendices A thru K of this report. The topics discussed respectively are: radiation induced embrittlement and annealing of reactor pressure vessel steels; loss of coolant accident blowdown analyses; LOCA blowdown response analyses; non-seismic structural response analyses; seismic analyses; S&#x27;&#x27; seal integrity; reactor transient analyses; fire protection; aircraft impacts; and boric acid induced corrosion. (FI).
Date: September 1, 1989
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

AC-130H Gunship Armor Upgrade Project

Description: This report covers the test methods and equipment for testing aircraft armor both hard and soft. The hard armor are the typical ceramic type while the soft armor are various types of layered composite materials. 10 figs. (JEF)
Date: September 19, 1990
Creator: Shell, T. E. & Landingham, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Department of Energy&#x27;s team&#x27;s analyses of Soviet designed VVERs

Description: The purpose of this report is to summarize the results of the US Department of Energy (DOE) Analysis Team&#x27;s analyses of Soviet designed VVERs (Water-cooled, Water-moderated Energy Reactor). The principle objective of this undertaking is to provide a basis to better understand the safety related features of the Soviet designed VVERs to be better prepared to respond domestically in the event of an accident at such a unit. The USDOE Team&#x27;s analyses are presented together with supporting … more
Date: September 1, 1989
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wavelet-based acoustic recognition of aircraft

Description: We describe a wavelet-based technique for identifying aircraft from acoustic emissions during take-off and landing. Tests show that the sensor can be a single, inexpensive hearing-aid microphone placed close to the ground the paper describes data collection, analysis by various technique, methods of event classification, and extraction of certain physical parameters from wavelet subspace projections. The primary goal of this paper is to show that wavelet analysis can be used as a divide-and-con… more
Date: September 1, 1994
Creator: Dress, W. B. & Kercel, S. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of using cyclocranes to support drilling and production of oil and gas in wetland areas. Fourth quarterly technical progress report, Second quarter, 1993

Description: The planned program falls under wetlands area research related to drilling, production, and transportation of oil and gas resources. Specifically the planned program addresses an evaluation of using cyclocraft to transport drill rigs, mud, pipes and other materials and equipment in a cost effective and environmentally safe manner to support oil and gas drilling and production operations in wetland areas. The cyclocraft is a proven hybrid aircraft that utilizes aerostatic and aerodynamic lift. T… more
Date: September 1, 1993
Creator: Eggington, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Failure Modeling of Titanium-6Al-4V and 2024-T3 Aluminum with the Johnson-Cook Material Model

Description: A validated Johnson-Cook model could be employed to perform simulations that conform to FAA standards for evaluating aircraft and engine designs for airworthiness and containment considerations. A previous LLNL report [1] described the motivation for using the Johnson-Cook material model in simulations involving engine containment and the effect of uncontained engine debris on aircraft structures. In that report, experimental studies of the deformation and failure behavior of Ti-6Al-4V and 2024… more
Date: September 16, 2002
Creator: Kay, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of methodologies for analysis of the dungeness B accidental aircraft crash risk.

Description: The Health and Safety Executive (HSE) has requested Sandia National Laboratories (SNL) to review the aircraft crash methodology for nuclear facilities that are being used in the United Kingdom (UK). The scope of the work included a review of one method utilized in the UK for assessing the potential for accidental airplane crashes into nuclear facilities (Task 1) and a comparison of the UK methodology against similar International Atomic Energy Agency (IAEA), United States (US) Department of Ene… more
Date: September 1, 2010
Creator: LaChance, Jeffrey L. & Hansen, Clifford W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final report on development of Pulse Arrested Spark Discharge (PASD) for aging aircraft wiring application.

Description: Pulsed Arrested Spark Discharge (PASD) is a Sandia National Laboratories Patented, non-destructive wiring system diagnostic that has been developed to detect defects in aging wiring systems in the commercial aircraft fleet. PASD was previously demonstrated on relatively controlled geometry wiring such as coaxial cables and shielded twisted-pair wiring through a contract with the U.S. navy and is discussed in a Sandia National Laboratories report, SAND2001-3225 ''Pulsed Arrested Spark Discharge … more
Date: September 1, 2006
Creator: Lockner, Thomas Ramsbeck; Howard, R. Kevin; Peña, Gary Edward; Schneider, Larry X.; Higgins, Matthew B. & Glover, Steven Frank
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aerial Radiation Detection

Description: An airborne system designed for the detection of radioactive sources on the soil surface from an aircraft normally senses gamma rays emitted by the source. Gamma rays have the longest path length (least attenuation) through the air of any of the common radioactive emissions and will thus permit source detection at large distances. A secondary benefit from gamma rays detection if that nearly all radioactive isotopes can be identified by the spectrum of gammas emitted. Major gaseous emissions fro… more
Date: September 30, 1999
Creator: Quam, W. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

F-111 windscreen machining. Final report

Description: Studies were conducted to determine the feasibility of improving the optical image transmitted through a military aircraft windscreen by using single-point diamond turning. Reduced warpage (waviness) of the windscreen surfaces ensures that a more accurate optical image is presented to the aircraft pilot. Machining the acrylic surface was accomplished with slightly impared image transmissibility. The use of this technique as a potential production process is discussed.
Date: September 22, 1980
Creator: Gerth, H. L. & Brown, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Damage detection and health monitoring of operational structures

Description: Initial damage detection/health monitoring experiments have been performed on three different operational structures: a fracture critical bridge, a composite wind turbine blade, and an aging aircraft. An induced damage test was performed on the Rio Grande/I40 bridge before its demolition. The composite wind turbine test was fatgued to failure with periodic modal testing performed throughout the testing. The front fuselage of a DC-9 aircraft was used as the testbed for an induced damage test. Th… more
Date: September 1, 1994
Creator: James, G.; Mayes, R.; Carne, T. & Reese, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of vortex-induced counter torque and fin pressure on a finned body of revolution.

Description: Finned bodies of revolution firing lateral jets in flight may experience lower spin rates than predicted. This reduction in spin rate is a result of vortices generated by the interaction between the lateral jets and freestream air flowing past the body. The vortices change the pressure distribution on the fins, inducing a counter torque that opposes the desired spin. Wind tunnel data measuring roll torque and fin pressures were collected for a full-scale model at varying angle of attack, roll a… more
Date: September 1, 2005
Creator: Chang, Leyen S. (Stanford University, Stanford, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of the non-destructive nature of PASD on wire insulation integrity.

Description: The potential of a new cable diagnostic known as Pulse-Arrested Spark Discharge technique (PASD) is being studied. Previous reports have documented the capability of the technique to locate cable failures using a short high voltage pulse. This report will investigate the impact of PASD on the sample under test. In this report, two different energy deposition experiments are discussed. These experiments include the PASD pulse ({approx}6 mJ) and a high energy discharge ({approx}600 mJ) produced f… more
Date: September 1, 2003
Creator: Lockner, Thomas Ramsbeck; Peña, Gary Edward; Schneider, Larry X.; Higgins, Matthew B. & Glover, Steven Frank
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probabilistic approach to EMP assessment

Description: The development of nuclear EMP hardness requirements must account for uncertainties in the environment, in interaction and coupling, and in the susceptibility of subsystems and components. Typical uncertainties of the last two kinds are briefly summarized, and an assessment methodology is outlined, based on a probabilistic approach that encompasses the basic concepts of reliability. It is suggested that statements of survivability be made compatible with system reliability. Validation of the ap… more
Date: September 1, 1980
Creator: Bevensee, R. M.; Cabayan, H. S.; Deadrick, F. J.; Martin, L. C. & Mensing, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Organized Oscillations of Initially-Turbulent Flow Past a Cavity

Description: Flow past an open cavity is known to give rise to self-sustained oscillations in a wide variety of configurations, including slotted-wall, wind and water tunnels, slotted flumes, bellows-type pipe geometries, high-head gates and gate slots, aircraft components and internal piping systems. These cavity-type oscillations are the origin of coherent and broadband sources of noise and, if the structure is sufficiently flexible, flow-induced vibration as well. Moreover, depending upon the state of th… more
Date: September 17, 2002
Creator: Lin, J. C. & Rockwell, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microcellular ceramic foams for radar absorbing structures

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The goal of this project is to develop a lightweight, semi-structural, radar-absorbing ceramic foam that can be incorporated into aircraft exhaust systems to replace many of the currently used dense ceramic parts and thereby improve the radar cross section. Although the conventional processes for producing ceramic foams have not been able to provide m… more
Date: September 1, 1996
Creator: Huling, J. & Phillips, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Unitized regenerative fuel cell systems

Description: Energy storage systems with extremely high specific energy (>400 Wh/kg) have been designed that use lightweight pressure vessels to contain the gases generated by reversible (unitized) regenerative fuel cells (URFCs).[1] URFC systems are being designed and developed for a variety of applications, including high altitude long endurance (HALE) solar rechargeable aircraft (SRA), zero emission vehicles (ZEVs), hybrid energy storage/propulsion systems for spacecraft, energy storage for remote (off-g… more
Date: September 10, 1998
Creator: Mitlitsky, F; Molter, T M; Myers, B & Weisberg, A H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inverse scattering code

Description: A methodology for the evaluation of complex electromagnetics problems is presented. The methodology reduces the computational requirements for the analysis of large scale computational electromagnetics problems by hybridizing the method of moments and physical optics techniques. The target model is based on triangular facets and the incident field source by its system response function. Data which can be obtained from the analysis are radar cross section, power spectral density, and range profi… more
Date: September 1, 1997
Creator: Hale, A. & King, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Alleviation of fuselage form drag using vortex flows: Final report

Description: The concept of using vortex generators to reduce the fuselage form drag of transport aircraft combines the outflow from the plane of symmetry which is induced by the rotational component of the vortex flow with the energization of the boundary layer to reduce the momentum thickness and to delay or eliminate flow separation. This idea was first advanced by the author in 1981. Under a DOE grant, the concept was validated in wind tunnel tests of approximately 1:17 scale models of fuselages of Boei… more
Date: September 15, 1987
Creator: Wortman, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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