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| Title: | Development and Logistics Technical Program Plan Aircraft Systems Fire Safety | ||||
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| Author: | U.S. Department of Transportation | ||||
| Abstract: | The overall objective of the aircraft systems fire safety technical program is to characterize the hazards created by an in-flight fire as it relates to aircraft safety, determine effective means for preventing, detecting, extinguishing and isolating the fire through development of technical criteria operating procedures and recommendations for regulatory procedures for transport, general aviation and rotorcraft, that will establish overall fireworthy aircraft. Also, through continued study and testing to further improve the fire protection available in a postcrash fire. | ||||
| Report: | DOT/FAA/CT-84/1 | Pages: | 65 | Size: | 18.3 MB |
| Title: | Effects of Ventilation and Panel Properties on Temperature Rise from Aircraft Fires | ||||
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| Author: | Thor I. Eklund | ||||
| Abstract: | A simple model is developed to describe the performance of interior aircraft honeycomb panels in a fire environment. A perfect stirrer analysis is applied to an aircraft cabin in-flight fire of constant size. Heat addition from the fire is offset by heat losses through the aircraft ventilation system and heat transfer through wall and ceiling panels. The ventilation rate is generalized into an effective ventilation rate t_at includes the panel heat transfer losses. Jhe analysis demonstrates that conduction heat transfer and convection heat transfer can play comparable roles in lowering asymptotic values of enclosure temperature rise. The analysis leads to the definition of both a characteristic ventilation time and a characteristic burning time. The ratio of these times is a dimensionless variable that dominates asymptotic values of temperature. Pyrolysis of panels is further demonstrated as a potential heat sink. An experimental technique is proposed to determine the thermal inertia of a fuselage interior in a non-destructive fashion | ||||
| Report: | DOT/FAA/CT-TN83/63 | Pages: | 25 | Size: | 4.56 MB |
| Title: | Extinguisher Agent Behavior in a Ventilated Small Aircraft | ||||
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| Author: | G. R. Slusher, J. Wright, J. E. Demaree, & W. E. Neeses | ||||
| Abstract: | Hand-held Halon 1211 fire extinguisher were evaluated in a four-place Cessna Model 210C aircraft. The aircraft was operated in an airflow facility under simulated flight conditions. Extinguishers of 2.5 pound capacity were discharged to determine the dissipation rate and toxicity levels of Halon 1211 extinguishing agents. Agent concentration dissipated rapidly. Analysis of dose calculations demonstrated that 2.5 pound Halon 1211 extinguishers were safe in the four-passenger test aircraft. Dose calculations for the pilot were only 25 percent of the limit for Halon 1211. Ventilation airflow produced air changes in the cabin of 1.16 minutes at 120 miles per hour airspeed and 1 minute at 140 miles per hour. The high cabin ventilation rates together with the effects of agent stratification resulted in safe conditions. The effective air change time found in analysis was of the order of one-third of a minute. This quantity used in the procedures outlined in Advisory Circular AC-20-42B leads to the conclusion that discharge of Halon 1211 weights of 6 pounds can be safely withstood in the C120 under flight conditions. Discharge of a 2.5 pound chemical powder extinguisher adversely affected visibility for over 22 seconds. |
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| Report: | DOT/FAA/CT-83/30 | Pages: | 57 | Size: | 1.7 MB |
| Title: | Study on Transport Airplane Unplanned Water Contact | ||||
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| Author: | Richard Johnson | ||||
| Abstract: | This study provides for an identification of accident scenario(s) and associated occupant risks and survival equipment needs, relating to the inadvertent or unplanned water contact of transport category airplanes. This identification was obtained. In part, from the results of contractual studies of transport accident data. The subject study concludes that while the unplanned water contact of a transport airplane occurs less frequent than corresponding ground contact, the impact loads are often higher, leading to greater fuselage damage. Also, the unplanned water contact occurs more frequent than a planned water landing (ditching) and usually involves adverse flooding conditions. These conditions, in turn, affect the ability of occupants to retrieve, deploy, and/or don on-board floatation equipment. | ||||
| Report: | DOT/FAA/CT-84/3 | Pages: | 40 | Size: | 1.74 MB |
| Title: | The Combined Hazard Index Calculated from Release Rate Data | ||||
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| Author: | R. Filipczak | ||||
| Abstract: | The Ohio State University (OSU) Rate of Heat Release Calorimeter has been modified to measure selected toxic gases in the combustion products from an aircraft material test specimen. Through application of simple fire and survival models, an index for rating the fire hazard of a material tested in the OSU Calorimeter has been proposed pased on the heat and toxic gases measurements taken (Combined Hazard Index, or CHI). This technical note presents the theory and documents the software used to calculate a CHI using OSU Calorimeter data. | ||||
| Report: | DOT/FAA/CT-TN83/36 | Pages: | 15 | Size: | 2.31 MB |
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