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| Title: | U.S. Commercial Fleet Usage of Antimisting Fuels: Survey and Analysis | ||||
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| Author: | Bishan Azad, Paul Poston | ||||
| Abstract: | 'This report presents a data base and a methodology for analyzing the feasibility of using antimisting fuel in the commercial aviation fleet and ,includes: a classification scheme developed to analyze major portions of the aircraft fleet; review of the available information on antimisting fuel; analysis of data collected on aircraft operations; and use of' life-cycle costing techniques to analyze the potential impacts of introducing antimisting fuel on a fleet-wide basis and segmentally. Aircraft were classified by number of engines and type of service. For each aircraft group, data were collected on the physical, operational, and economic factors that could facilitate or impede the introduction of antimisting fuel into specific portions of the fleet. These data were analyzed to determine if there are significant advantages to segmental introduction of antimisting fuel and, if so, which portions of the fleet are the most likely candidates for early introduction of antimisting fuel. Analytical findings indicate that fleetwide introduction of antimisting fuel would maximize the benefit in terms of increased safety. However, segmental introduction may be preferable in terms of lower costs tand potential capacity constraints. Furthermore, the importance of two-engined, regular-bodied turbofan aircraft in the, feet, combined with the relatively low anticipated cost impacts in this segment, suggest that these aircraft may be the best candidates for early introduction of antimisting fuel. |
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| Report: | DOT/FAA/CT-82/59 | Pages: | 167 | Size: | 28.5 MB |
| Title: | Analytical Method for Water Vapor Collection and Analysis in Aircraft Cabin Fires | ||||
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| Author: | Louise Speitel | ||||
| Abstract: | A method of collection and analysis was developed to determine the concentration of water vapor in full-scale aircraft cabin fire tests as a function of time. Specialized collection tubes were developed which selectively trap water vapor. Particulates are filtered out of the sample stream and light fixed gases such as CO, CO2, O2, methane, propane and butane pass through the tube. The gas collection sections of the tubes are surrounded by ice-water to maximize collection efficiency of the desiccant packing material. The percentage of water in the test atmosphere is calculated based on the weight gain of the tube and the volume of sample drawn. The flow is controlled by a calibrated needle valve, downstream of the sampling assembly, held at a constant temperature. The method was validated by analyzing selected components of a sample tube from a full-scale fire test by Thermo gravimetric Analysis. | ||||
| Report: | DOT/FAA/CT-TN93/33 | Pages: | 11 | Size: | 14.9 MB |
| Title: | Radiative Ignition and Opposed Flow Flame Spread Measurements on Materials | ||||
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| Author: | Margaret Harkleroad, James Quintiere, William Walton | ||||
| Abstract: | The purpose of this study is to develop a fire-testing method that relates material ignitability and flame spread in the creeping mode. The analytical,approach involves parameters and solutions arising from transient heat condition to a semi-infinite solid. Experimental data are generated on an apparatus employing a radiant panel to provide a varying heat flux to test specimens. Flame spread rates and ignitioft events are measured against incident radiation and exposure time. The flame-spread data for given materials are correlated for varying exposure conditions by plotting the inverse square root of the flame-spread velocity against a product of the heat flux and a time function. The test and analysis results are shown for six diverse materials representative of aircraft (interior panels, carpeting, arid seat cushions) and buildings (plywood, polymethyl methacrylate, and rigid 1oam). | ||||
| Report: | DOT/FAA/CT-83/28 | Pages: | 86 | Size: | 8.84 MB |
| Title: | Widebody Cabin Water Spray Optimization Tests | ||||
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| Author: | Timothy Marker | ||||
| Abstract: | Nine full tests were conducted in a modified DC-10 test article as part of an aircraft cabin water spray optimization study. The purpose of the study was to test several spray configurations by varying the orientation of the nozzles, the flow rate, and the quantity of water sprayed, while keeping the fire conditions constant, in an attempt to minimize the amount of water required to effectively suppress a post crash aircraft fire and improve occupant survivability. The tests were used to validate optimization tests previously conducted in the narrowbody 707-test article. The initial test series employed a full-zone spray system, extending across the width of the fuselage, consisting of 7 zones, each containing 12 nozzles. A thermocouple was centrally mounted at ceiling height in each of the 8 foot long zones, allowing for the activation of a particular zone when the temperature reached a pre-determined value. A second series of test were run in which the original zones were divided in half, producing 5 zones on either side of the fuselage centerline for a total of 10. Each of the 10 zones contained 6 nozzles. The survival time was extended between 41 and 103 seconds, depending on zone configuration, discharge activation temperature and cabin location. |
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| Report: | DOT/FAA/CT-TN93/29 | Pages: | 33 | Size: | 9.4 MB |
| Title: | Handbook - Volume III Digital Systems Validation Book Plan | ||||
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| Author: | Joan Janowitz | ||||
| Abstract: | The Digital Systems Validation Handbook is a tutorial series designed to provide certification engineers information on current topics related to digital avionics. The book plan lays the foundation for volume III of this series. The purpose of the handbook book plan is to identify technology and related issues that certification engineers are likely to encounter. Volume III of the handbook series will consist of approximately 20 chapters. Sixteen chapters are described in the book plan. Four were reserved for technologies or issues that might emerge during the course of the volume III life cycle. A list of potential handbook topics was derived from a survey of the literature, conference and seminar attendance, results of an informal questionnaire, and interviews with Federal Aviation Administration (FAA) National Resource Specialists, experts in the field of certification and digital avionics, National Aeronautics and Space Administration (NASA) officials, and persons in private industry. From this input, the list of potential topics was developed and refined into handbook chapters. In addition to the chapter list and descriptions, the handbook purpose, scope, and use is discussed. The unabridged list of topics is included in the book plan appendix. |
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| Report: | DOT/FAA/CT-93/16 | Pages: | 16 | Size: | 3.34 MB |
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