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Displaying 57876 - 57900 of 74219

Executive Summary (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
Bromotrifluoromethane (halon 1301 or CF3Br) has been the fire-fighting agent of choice for decades to protect inaccessible spaces aboard aircraft in flight because of its inherent ability to inhibit combustion while possessing a high liquid density and

Flame Inhibition Chemistry and the Search for Additional Fire Fighting Chemicals (NIST SP 861)

April 1, 1994
Author(s)
Marc R. Nyden, Gregory T. Linteris, Donald R. Burgess Jr., P R. Westemoreland, Wing Tsang, Michael R. Zachariah
Replacements for the current commercial halons should posses a diverse set of properties which are rarely found together in the same molecule. Thus, the ideal candidate for the replacement of halon 1301 would be a nontoxic gas which is reactive in flames

Flame Suppression Effectiveness (NIST SP 861)

April 1, 1994
Author(s)
Anthony P. Hamins, G. Gmurczyk, William L. Grosshandler, R. G. Rehwoldt, I Vazquez, Thomas G. Cleary, Cary Presser, K Seshadri
A flame will be extinguished when the time required for the chain reaction which sustains combustion exceeds the time it takes to replenish the necessary heat and reactants. A characteristic time for reaction can be estimated from the inverse of a global

Fluid Dynamics of Agent Discharge (NIST SP 861)

April 1, 1994
Author(s)
William M. Pitts, Jiann C. Yang, G. Gmurczyk, Leonard Y. Cooper, William L. Grosshandler, W G. Cleveland, Cary Presser
The extinguishment of a fire using gaseous agents is a very complicated process which is not completely understood. Current fire-fighting agents such as halon 1301 and halon 1211 are believed to function by a combination of chemical (catalytic removal of

Human Exposure and Environmental Impact

April 1, 1994
Author(s)
E Braun, Richard D. Peacock, Glenn P. Forney, George W. Mulholland, Barbara C. Levin
Although these agents are typically employed in unoccupied sections of an aircraft, the possibility of human exposure still exists during handling, storage, and transport. Thus, it is important to know if the accidental release of the 12 agents in areas of

Introduction (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
The Montreal Protocol of 1987 identified halon 1301 (CF3Br) as one of a number of halogenated chemicals that were sufficiently deleterious to stratospheric ozone that their continued production and use required limitation. An amendment to the Protocol

Summary and Recommendations (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
The main objective of this research program was to provide guidance to the sponsors on which materials to evaluate in the full-scale fire suppression test plan at Wright-Patterson AFB. Specifically, the recommendations were to include the following: 1) The

The Measurement of the Pile-up Topography of Hardness Indentations

April 1, 1994
Author(s)
L Blunt, P Sullivan
A number of indentations were made in 70:30 brass specimens. The resulting surface disturbance was analyzed using a stylus-based 3D topography measuring instrument. Numerical methods based on progressive truncation routines were developed in order to

Thermodynamic Properties of Alternative Agents (NIST SP 861)

April 1, 1994
Author(s)
Jiann C. Yang, B D. Breuel
Depending upon their applications, current halon 1301 (CF3Br) bottles are normally filled to about half of the bottle volume, and the bottle is then pressurized with nitrogen to 4.1 MPa (600 psig) at room temperature. The purpose of using the

Dimensional Inspection Planning Based on Product Data Standards

March 19, 1994
Author(s)
Shaw C. Feng
An international standard on product data representation and exchange for dimensional inspection planning is being developed. This paper provides a review of fundamental technology enabling the standard development and describes the current status of an
Displaying 57876 - 57900 of 74219
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