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| Title: | The Comparative Extinguishment Performance and Thermal Decomposition Products of Halon Alternative Agents | ||||
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| Author: | Robert A. Filipczak | ||||
| Abstract: | Halon 1301, Halon 1211, and eleven alternative fire-fighting agents were compared for extinguishment effectiveness and thermal decomposition product generation, using a laboratory-scale test apparatus having methane as the fuel. Chemical analysis was conducted using a magnetic sector mass spectrometer with simultaneous measurement of oxygen consumption and carbon dioxide, water and acid gas production. Chemical mechanisms are advanced to explain how halongenated hydrocarbons extinguish fires. The major conclusion was that the alternative agents were not as effective at fighting fires as Halons and those greater amounts of acid gases were produced during extinguishment. Hydrogen fluoride was found to be the predominant thermal decomposition product for all agents. | ||||
| Report: | DOT/FAA/CT-94/59 | Pages: | 58 | Size: | 2.2 MB |
| Title: | Investigation of Flight Data Recorder Fire Test Requirements | ||||
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| Author: | Lawrence J. Curran, Jr. | ||||
| Abstract: | This report evaluates fire test methodologies for aircraft flight data and cockpit voice recorders. The current fire test requirements consists of a 30 minute exposure to a propane burner calibrated to the heating conditions created by a jet fuel fire. A comparison was made of the internal temperature of flight recorder models subjected to the propane burner standard and a jet fuel fire. The internal temperature was approximately 40 percent higher during the fuel fire tests which were 6-8 minutes in duration. Although the fuel fire duration was limited, it appears that a 60-minute propane burner test exposure is a feasible and conservative means of evaluating the thermal resistance of a flight recorder subjected to a 30-minute fuel fire. An additional fire test condition (500 F/10 hours) has been proposed to simulate a smoldering fire which may persist for a long period of time at remote site. A state-of-the-art magnetic tape of the cockpit voice recorder was subjected to this condition in an oven and failed the test, demonstrating the severity of this exposure environment. | ||||
| Report: | DOT/FAA/CT-TN94/23 | Pages: | 27 | Size: | 1.92 MB |
| Title: | Round Robin Comparison of Heat Release Appartus | ||||
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| Author: | Richard M. Johnson | ||||
| Abstract: | A comparison was made between data produced by Heat Release Apparatus complient with present FAA/JAA standards and data produced by Heat Release Apparatus designed and used by the All-Russian Institute of Aviation Materials (VIAM). Results show little or no correlation between the two. | ||||
| Report: | DOT/FAA/CT-TN | Pages: | 15 | Size: | 1.81 MB |
| Title: | Aircraft Fuel System Lightning Protection Design and Qualification Test Procedures Development | ||||
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| Author: | Keith E. Crouch | ||||
| Abstract: | The Navy and the Air Force recognized the need for improved test procedures for evaluating the lightning protection design of aircraft fuel systems. Under their sponsorship, a program to develop adjustable, standard ignition sources which could be used to calibrate techniques for detecting ignition sources during lightning testing was established. The minimum ignition levels of voltage sparks and hot spots were established under the program before it was terminated due to funding problems. The present program, under FAA sponsorship, is a continuation of the original program. The Standard Voltage Spark Ignition Source and the Standard Hot Spot Ignition Source were completed and documented. The most promising approach for developing a Standard Thermal Spark Ignition Source was determined and is presented. .Photographic detection techniques were investigated and the limitations determined. The presence of light on a photographic film indicated the possibility of an ignition source but can not confirm the ignition probability (if any). Hydrogen mixtures appear to provide the ability to have adjustable ignition probabilities and low energy (low over-pressure) ignitions. |
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| Report: | DOT/FAA/CT-94/74 | Pages: | 189 | Size: | 158 MB |
| Title: | Round-Robin Comparison of Heat Release Apparatus | ||||
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| Author: | Richard M. Johnson | ||||
| Abstract: | A series of 150 comparative tests were run by four currently operating laboratories using heat release apparatuses compliant with present FAA/JAR standards and the ATI-Russian Institute of Aviation Materials (VIAM) designed heat release apparatus. The evaluation of data showed little or no correlation between the subject apparatus and the four compliant apparatuses. | ||||
| Report: | DOT/FAA/CT-TN94/42 | Pages: | 13 | Size: | 458 KB |
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