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Ares I Scale Model Acoustic Test Instrumentation for Acoustic and Pressure Measurements - Bog af Magda B Vargas - Paperback

Ares I Scale Model Acoustic Test Instrumentation for Acoustic and Pressure Measurements - Bog af Magda B Vargas - Paperback

Ares I Scale Model Acoustic Test (ASMAT) is a 5% scale model test of the Ares I vehicle, launch pad and support structures conducted at MSFC to verify acoustic and ignition environments and evaluate water suppression systems Test design considerations 5% measurements must be scaled to full scale requiring high frequency measurements Users had different frequencies of interest Acoustics: 200 - 2,000 Hz full scale equals 4,000 - 40,000 Hz model scale Ignition Transient: 0 - 100 Hz full scale equals..

DKK 157.95
2

Ditching Tests of a 1/18-Scale Model of the Lockheed Constellation Airplane - Bog af Lloyd J Fisher - Paperback

Ditching Tests of a 1/18-Scale Model of the Lockheed Constellation Airplane - Bog af Lloyd J Fisher - Paperback

Tests were made of a 1/18-scale dynamically similar model of the Lockheed Constellation airplane to investigate its ditching characteristics and proper ditching technique. Scale-strength bottoms were used to reproduce probable damage to the fuselage. The model was landed in calm water at the Langley tank no. 2 monorail. Various landing attitudes, speeds, and fuselage configuration were simulated. The behavior of the model was determined from visual observations, by recording the longitudinal decelerations,..

DKK 148.95
2

Army Training - Computer Simulations Can Improve Command Training in Large-Scale Exercises: Nsiad-91-67 - Bog - Paperback

Army Training - Computer Simulations Can Improve Command Training in Large-Scale Exercises: Nsiad-91-67 - Bog - Paperback

Pursuant to a congressional request, GAO reviewed the Army's 1990 Return of Forces to Germany (REFORGER) strategic deployment exercise, focusing on the: (1) extent to which the Army scaled the exercise down; (2) advantages and limitations of using computer simulations in comparison with large-scale ground maneuvers; (3) future plans for using simulations; and (4) potential savings that could result from increased reliance on simulations for training. GAO found that: (1) although the Army reduced..

DKK 145.95
2

Transport of Total Tailings Paste Backfill - Results of Full-Scale Pipe Test Loop Pumping Tests - Bog - Paperback

Transport of Total Tailings Paste Backfill - Results of Full-Scale Pipe Test Loop Pumping Tests - Bog - Paperback

This report presents the results of tests conducted by the U.S. Bureau of Mines to determine the transport characteristics of highly concentrated paste backfill mixes made from dewatered total mine tailings. The slurry concentrations of the mixes were all above 78 pct by weight with slumps ranging from 6.4 to 16.5 cm (2.5 to 6.5 in). Laboratory material property tests and full-scale pumping tests were conducted using pipe diameters of 102, 128, and 154 mm (4, 5, and 6 in) and a positive-displacement..

DKK 159.95
2

Ditching Tests of a 1/20-Scale Model of the Northrop B-35 Airplane - Bog af Lloyd J Fisher - Paperback

Ditching Tests of a 1/20-Scale Model of the Northrop B-35 Airplane - Bog af Lloyd J Fisher - Paperback

Tests of a 1/20-scale dynamically similar model of the Northrop B-35 airplane were made to study its ditching characteristics. The model was ditched in calm water at the Langley tank no. 2 monorail. Various landing attitudes, speeds, and conditions of damage were simulated during the investigation. The ditching characteristics were determined by visual observation and from motion-picture records and time-history acceleration records. Both longitudinal and lateral accelerations were measured. Results..

DKK 157.95
2

Cfd Analysis of 1/7th Scale Steam Generator Inlet Plenum Mixing During a Pwr Severe Accident - Nureg-1781 - Bog - Paperback

Cfd Analysis of 1/7th Scale Steam Generator Inlet Plenum Mixing During a Pwr Severe Accident - Nureg-1781 - Bog - Paperback

Computational fluid dynamics (CFD) is used to predict steam generator inlet plenum mixing during a severe accident scenario in a pressurized water reactor. Comparisons are made to 1/7th scale data. Qualitatively, the code predicts the experimental flow patterns and mixing phenomena. Quantitatively, comparisons are made with key temperatures, mass flows, and mixing parameters. The best estimate prediction is generally within 5% of the reported values. Key temperature predictions are within a few degrees..

DKK 178.95
2

Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them - Bog - Paperback

Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them - Bog - Paperback

Utility-scale solar projects have grown rapidly in number and size over the last few years, driven in part by strong renewable portfolio standards (RPS) and federal incentives designed to stimulate investment in renewable energy technologies. This report provides an overview of such policies, as well as the project financial structures they enable, based on industry literature, publicly available data, and questionnaires conducted by the National Renewable Energy Laboratory (NREL).

DKK 178.95
2

Liquid Oxygen Propellant Densification Production and Performance Test Results with a Large-Scale Flight-Weight Propellant Tank for the X33 Rlv - Bog

Liquid Oxygen Propellant Densification Production and Performance Test Results with a Large-Scale Flight-Weight Propellant Tank for the X33 Rlv - Bog

This paper describes in-detail a test program that was initiated at the Glenn Research Center (GRC) involving the cryogenic densification of liquid oxygen (LO2). A large scale LO2 propellant densification system rated for 200 gpm and sized for the X-33 LO2 propellant tank, was designed, fabricated and tested at the GRC. Multiple objectives of the test program included validation of LO2 production unit hardware and characterization of densifier performance at design and transient conditions. First,..

DKK 223.95
2

An Investigation of the Aerodynamic Characteristics of an 0.08-Scale Model of the Chance Vought Xf7u-1 Airplane in the Langley High-Speed 7 by 10-Foot

An Investigation of the Aerodynamic Characteristics of an 0.08-Scale Model of the Chance Vought Xf7u-1 Airplane in the Langley High-Speed 7 by 10-Foot

Tests have been conducted in the Langley high speed 7- by 10-foot tunnel over a Mach number range from 0.40 to 0.91 to determine the stability and control characteristics of an 0,08-scale model of the Chance Vought XF7U-1 airplane. The longitudinal-control characteristics of the complete model are presented in the present report with a limited analysis of the results.

DKK 159.95
2

An Investigation of the Aerodynamic Characteristics of an 0.08-Scale Model of the Chance Vought Xf7u-1 Airplane in the Langley High-Speed 7- By 10-Foo

An Investigation of the Aerodynamic Characteristics of an 0.08-Scale Model of the Chance Vought Xf7u-1 Airplane in the Langley High-Speed 7- By 10-Foo

Tests have been conducted in the Langley high-speed 7- by 10-foot tunnel over a Mach number range from 0.40 to 0.91 to determine the stability and control characteristics of an 0.08-scale model of the Chance Vought XF7U-1 airplane. The aileron characteristics of the complete model are presented in the present report with a very limited analysis of the results.

DKK 158.95
2

Grid-Scale Energy Storage - Bog - Paperback

Grid-Scale Energy Storage - Bog - Paperback

The BiblioGov Project is an effort to expand awareness of the public documents and records of the U.S. Government via print publications. In broadening the public understanding of government and its work, an enlightened democracy can grow and prosper. Ranging from historic Congressional Bills to the most recent Budget of the United States Government, the BiblioGov Project spans a wealth of government information. These works are now made available through an environmentally friendly, print-on-demand..

DKK 200.95
2

Major and Trace Element Concentrations in Soils from Two Continental-Scale Transects of the United States and Canada - Usgs Open-File Report 2005-1253

Major and Trace Element Concentrations in Soils from Two Continental-Scale Transects of the United States and Canada - Usgs Open-File Report 2005-1253

This report contains major- and trace-element concentration data for soil samples collected from 265 sites along two continental-scale transects in North America. One of the transects extends from northern Manitoba to the United States-Mexico border near El Paso, Tex. and consists of 105 sites. The other transect approximately follows the 38th parallel from the Pacific coast of the United States near San Francisco, Calif., to the Atlantic coast along the Maryland shore and consists of 160 sites...

DKK 121.95
2

Free-Spinning-Tunnel Tests of a 1/27-Scale Model of the Douglas Xf3d-1 Airplane, Ted No. NACA de 312 - Bog af Stanley H Scher - Paperback

Free-Spinning-Tunnel Tests of a 1/27-Scale Model of the Douglas Xf3d-1 Airplane, Ted No. NACA de 312 - Bog af Stanley H Scher - Paperback

Free-spinning-tunnel tests have been made on a 1/27-scale model of the Douglas XF3D-1 airplane to confirm a preliminary evaluation made of the airplane spin and recovery characteristics and previously reported. Recovery characteristics were satisfactory for erect and inverted spins when the model was in the clean condition. When the slow-down brakes were open, recoveries were slow. The pedal force necessary to reverse the airplane rudder during a spin will be within the physical capabilities of the..

DKK 148.95
2

Transonic Free-Flight Investigation of the Longitudinal Aerodynamic Characteristics of a 1/10-Scale Steel-Wing Model of the Northrop MX-775a Missile W

Transonic Free-Flight Investigation of the Longitudinal Aerodynamic Characteristics of a 1/10-Scale Steel-Wing Model of the Northrop MX-775a Missile W

Results are presented of a free-flight investigation between Mach numbers of 0.7 to 1.3 and Reynolds numbers of 3.1 x 10(exp 6) to 7.0 x 10(exp 6) to determine the longitudinal aerodynamic characteristics of the Northrop MX-775A missile. This missile has a weng, body, and vertical tail, but has no horizontal tail. The basic wing plan form has an aspect ratio of 5.5, 45 deg of sweepback of the 0.406 streamwise chord line, and a taper ratio of 0.4. A 1/10-scale steel-wing model of the missile was flown..

DKK 129.95
2