Author: Publisher:
ISBN:
Category : Ordnance
Languages : en
Pages : 57
Book Description
Erosion in Large Gun Barrels
Author: Erosion in Large Gun Barrels
Author: Publisher: National Academies
ISBN:
Category : History
Languages : en
Pages : 72
Book Description
Confronted with problems associated with the continual upgrading of field guns, reducing the number of different items in supply and lowering overall costs, the Department of the Army has need for improved methods of reducing erosion and extending the wear life of long range cannon. The National Materials Advisory Board was asked to consider all facets of this need and to make recommendations. Erosion in Large Gun Barrels assesses the nature of the bore erosion problem; identifies fruitful areas of research; assesses the state of technology of materials and methods in areas which may become significant to gun tubes of improved performance; and suggests experimental techniques, devices, and instruments and methods of reducing data to enhance the continuing coordination of the activities of the three Services.
Experimental Plating of Gun Bores to Retard Erosion
Author: Vernon A. LambPublisher:
ISBN:
Category : Corrosion and anti-corrosives
Languages : en
Pages : 106
Book Description
Advanced Energetic Materials
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309166470
Category : Technology & Engineering
Languages : en
Pages : 64
Book Description
Advanced energetic materialsâ€"explosive fill and propellantsâ€"are a critical technology for national security. While several new promising concepts and formulations have emerged in recent years, the Department of Defense is concerned about the nation's ability to maintain and improve the knowledge base in this area. To assist in addressing these concerns, two offices within DOD asked the NRC to investigate and assess the scope and health of the U.S. R&D efforts in energetic materials. This report provides that assessment. It presents several findings about the current R&D effort and recommendations aimed at improving U.S. capabilities in developing new energetic materials technology. This study reviewed U.S. research and development in advanced energetics being conducted by DoD, the DoE national laboratories, industries, and academia, from a list provided by the sponsors. It also: (a) reviewed papers and technology assessments of non-U.S. work in advanced energetics, assessed important parameters, such as validity, viability, and the likelihood that each of these materials can be produced in quantity; (b) identified barriers to scale-up and production, and suggested technical approaches for addressing potential problems; and (c) suggested specific opportunities, strategies, and priorities for government sponsorship of technologies and manufacturing process development.
Transient Temperature in Engineering and Science
Author: Bryan LawtonPublisher: Oxford University Press on Demand
ISBN: 9780198562603
Category : Science
Languages : en
Pages : 584
Book Description
This book gives a comprehensive account of the principles and practical methods applicable to transient temperature measurements in engineering and science. Transient temperatures are taken to be in the range from about 200K to 6000K and with timescales from tenths of nanoseconds to tens ofseconds. Within these limits is a very large field of combustion and gas dynamics and these are the principle areas which are addressed. Several new experimental and theoretical techniques are introduced and various modes of thermal failure are described.The chapters move from undergraduate material to the latest methods and are designed to be of use to the widest possible range of engineers, scientists, and students working in universities or in chemical or mechanical engineering. Many applications are described.
Chambering Rifle Barrels for Accuracy
Author: Fred ZeglinPublisher: 4D Reamer Rentals Limited
ISBN: 9780983159858
Category :
Languages : en
Pages : 124
Book Description
in Part I, Fred Zeglin gives you an in depth study of what it takes to build an accurate hunting rifle. Fred has been building custom hunting rifles for over thirty years. His clients come from all walks of life and have one thing in common; when they go hunting they don't want to worry about the accuracy of their rifle.In Part II, Gordy Gritters explains the extreme accuracy requirements of a quality benchrest rifle. Gordy has nearly thirty years invested in building precision rifles. He is a competitive shooter as well as a gunsmith. Builder of many high accuracy rifles used by customers across North America to set records and win various rifle competitions including the Varmint Hunter Jamboree, Coyote Hunting National Championship, 1000 yard matches, 600 yard matches, F-Class matches, BR-50, IR 50-50, 100 and 200 yard benchrest matches, sniper matches, NRA service rifle matches, as well as for varmint and big game hunting.
ARL TR.
Author: Aerospace Research Laboratories (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 56
Book Description
An Erosion Gauge
Author: L. E. Della LuccaPublisher:
ISBN:
Category : Metals
Languages : en
Pages : 20
Book Description
The Control of Nature
Author: John McPheePublisher: Farrar, Straus and Giroux
ISBN: 0374708495
Category : Nature
Languages : en
Pages : 272
Book Description
While John McPhee was working on his previous book, Rising from the Plains, he happened to walk by the engineering building at the University of Wyoming, where words etched in limestone said: "Strive on--the control of Nature is won, not given." In the morning sunlight, that central phrase--"the control of nature"--seemed to sparkle with unintended ambiguity. Bilateral, symmetrical, it could with equal speed travel in opposite directions. For some years, he had been planning a book about places in the world where people have been engaged in all-out battles with nature, about (in the words of the book itself) "any struggle against natural forces--heroic or venal, rash or well advised--when human beings conscript themselves to fight against the earth, to take what is not given, to rout the destroying enemy, to surround the base of Mt. Olympus demanding and expecting the surrender of the gods." His interest had first been sparked when he went into the Atchafalaya--the largest river swamp in North America--and had learned that virtually all of its waters were metered and rationed by a U.S. Army Corps of Engineers' project called Old River Control. In the natural cycles of the Mississippi's deltaic plain, the time had come for the Mississippi to change course, to shift its mouth more than a hundred miles and go down the Atchafalaya, one of its distributary branches. The United States could not afford that--for New Orleans, Baton Rouge, and all the industries that lie between would be cut off from river commerce with the rest of the nation. At a place called Old River, the Corps therefore had built a great fortress--part dam, part valve--to restrain the flow of the Atchafalaya and compel the Mississippi to stay where it is. In Iceland, in 1973, an island split open without warning and huge volumes of lava began moving in the direction of a harbor scarcely half a mile away. It was not only Iceland's premier fishing port (accounting for a large percentage of Iceland's export economy) but it was also the only harbor along the nation's southern coast. As the lava threatened to fill the harbor and wipe it out, a physicist named Thorbjorn Sigurgeirsson suggested a way to fight against the flowing red rock--initiating an all-out endeavor unique in human history. On the big island of Hawaii, one of the world's two must eruptive hot spots, people are not unmindful of the Icelandic example. McPhee went to Hawaii to talk with them and to walk beside the edges of a molten lake and incandescent rivers. Some of the more expensive real estate in Los Angeles is up against mountains that are rising and disintegrating as rapidly as any in the world. After a complex coincidence of natural events, boulders will flow out of these mountains like fish eggs, mixed with mud, sand, and smaller rocks in a cascading mass known as debris flow. Plucking up trees and cars, bursting through doors and windows, filling up houses to their eaves, debris flows threaten the lives of people living in and near Los Angeles' famous canyons. At extraordinary expense the city has built a hundred and fifty stadium-like basins in a daring effort to catch the debris. Taking us deep into these contested territories, McPhee details the strategies and tactics through which people attempt to control nature. Most striking in his vivid depiction of the main contestants: nature in complex and awesome guises, and those who would attempt to wrest control from her--stubborn, often ingenious, and always arresting characters.
Chromium and Chromium Alloys
Author: D. J. MaykuthPublisher:
ISBN:
Category : Chromium
Languages : en
Pages : 130
Book Description
Various alloying additions have been discovered which render unalloyed chromium much less susceptible to low-temperature embrittlement as well as to nitridation in air at elevated temperatures. These include additions of the Group IIIA metals, magnesia, and carbides based on the Groups IVA and VA metals. Of these additions, only the carbides contribute significantly to the hot strengthening of chromium. The combination of selected carbides and solid-solution-strengthening elements such as tungsten, molybdenum, and/or tantalum, has resulted in experimental alloys which retain useful strengths at temperatures through 1316 C (2400 F). These high strengths are achieved at some sacrifice in the low-temperature ductility of chromium. Also, despite the improvements afforded in the oxidation and nitridation resistance of chromium through alloying, no alloys are available which are capable of service in long-time exposures in air above 982 C (1800 F) without suffering some property degradation.
