Search Results
Records 456 to 460 of 733
First
Previous
| Title: | A Study Of The Decomposition Products Of Polyurethane Foam Related To Aircraft Cabin Flash Fires | ||||
|---|---|---|---|---|---|
| Author: | Maya Paabo, J.J. Comeford | ||||
| Abstract: | A laboratory model of a flash fire cell using a high voltage arc as an ignition source was assembled and tested. The cell is designed to pyrolyze the sample in air while measuring the time of onset of a flash fire and simultaneously allowing withdrawal of gas samples for analysis. Some of the low mlecular weight products produced form the pyrolysis of flexible polyether type urethane foams were identified. The flash fire cell was used to compare the flash fire potential of polymers of potential interest to the aircraft industry. Studies of the role of smoke in flash fire produced in the pyrolysis of flexible urethanes were undertaken. Flash fires in the cell were recorded on 16mm motion picture film. | ||||
| Report: | FAA-RD-73-46 | Pages: | 36 | Size: | 8.75 MB |
| Title: | Physio-Chemical Study of Smoke Emission By Aircraft Interior Materials - Part II | ||||
|---|---|---|---|---|---|
| Author: | I.N. Einhorn, M.D. Kanakia, J.D. Seader | ||||
| Abstract: | A study was conducted by personnel of the University of Utah's Flammability Research Center to determine the flammability characteristics and thermal degradation of urethane cellular plastics used in aircraft interiors. Initially, model urethane polymers, representative of systems used in aircraft interiors, were prepared, and the effect of the chemical structure of isocyana tes and ployols on performance during fire exposure were studied. A series of non-fireretarded rigid-urethane foams was synthesized and evaluated to serve as the basis for further research directed toward the synthesis of fire-retarded systems. Following this, a series of fire-retarded rigid foams was synthesized incorporating reactive and non-reactive fire retardants in various concentrations. The flammability characteristics of these cellular plastics'were evaluated using test methods for the ease of ignition, flame propagation, fire endurance, smoke emission, and oxygen index as criteria. Based on the information obtained, a series of optimized rigid foams, which incorporated reactive and auxiliary fire retardants, was prepared and evaluated. The optimized rigid foam systems exhibited substantial improvements in the ignition, flame propagation, and fire-endurance characteristics, and a moderate reduction in the tendency to produce smoke. Similar studies were carried out using formulations representing flexible urethane foams. Improvement in those properties governing ignition and flame propagation were !realized at the expense of increasing the smoking tendency of these flexible systems. | ||||
| Report: | FAA-RD-73-50II | Pages: | 142 | Size: | 24.9 MB |
| Title: | Physio-Chemical Study Of Smoke Emission By Aircraft Interior Materials , Part I | ||||
|---|---|---|---|---|---|
| Author: | I.N. Einhorn | ||||
| Abstract: | A concise review of the physiological and toxicological aspects of smoke during fire exposure has been presented. This report attempts to elucidate the parameters, both chemical and physical, which lead to smoke development, and subsequently, light obscuration, during their pyrolysis and combustion. Analysis of recent fire statistics covering, losses during the past decade has been compiled and incorporated into the report. Various laboratory test procedures, both small-scale and large-scale, have been summarized and a critique presented outlining their usefulness and problems encountered in interpretation of results obtained using these test procedures. A review of the physiological and toxicological parameters affecting survival of humans during fire exposure is given. Consideration is directed toward the specific hazards encountered during aircraft accidents involving fire. Recent reviews of the medical literature"pertaining to fire injury is discussed in detail. |
||||
| Report: | FAA-RD-73-50, I | Pages: | 83 | Size: | 21.4 MB |
| Title: | The Use of Ground Cover Materials to Suppress Fuel Spill Fires | ||||
|---|---|---|---|---|---|
| Author: | George B. Geyer, Lawrence M. Neri, & Charles H. Urban | ||||
| Abstract: | Small-scale experiments were conducted to determine the effectiveness of crushed and graded stone aggregate in preventing or retarding the rate of flame propagation from a fixed-ignition source when it was employed as a simulated ground cover material under controlled experimental conditions, for each of three aviation fuels. Tests included the use of loosely packed aggregate and no-fines concrete made with the same material. No significant difference in the rate of flame spread was noted between the loosely packed aggregate and no-fines concrete under equivalent test conditions. The experiments showed that the effectiveness of a point of the hydrocarbon fuel and of its depth below the surface of the simulated ground cover. The fire suppression and/or containment effectiveness of the ground cover materials increased as the size of the aggregate decreased and the flash point of the fuel increased and as the depth of the fuel below the surface of the stone increased. | ||||
| Report: | FAA-RD-73-74 | Pages: | 21 | Size: | 2 MB |
| Title: | Simulated In Flight Fire Test Of A Self-Generating Overheat Detection System | ||||
|---|---|---|---|---|---|
| Author: | Richard G. Hill | ||||
| Abstract: | Tests under simulated flight conditions were conducted on a Self-Generating Overheat Detection System installed in a C-140 airplane engine nacelle. They were run with the system in its normal configuration and also with a section of the detection cable pinched, opened and shorted. The system was monitored for fire response time as well as for false alarms. The system performed well in it normal, pinched and opened configurations, but the alarm time was increased by over 100 percent when the cable was shorted. No false alarms were noted during testing. |
||||
| Report: | FSR-0037 | Pages: | 7 | Size: | 344 KB |
Search Again
Choose the type of search you'd like to perform:
(Use AND or OR to refine your search)