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Records 386 to 390 of 733
| Title: |
Toxicity of Pyrolysis Gases from Synthetic Polymers |
| Author: |
Carlos J. Hilado, Jeanne A. Soriano, Kay L. Kosola, Demetrius A. Kourtides, John A. Parker |
| Abstract: |
The toxicity of the pyrolysis gases from some syntheic polymers was investigated, using the screening test method developed at the University of San Francisco. The synthetic polymers were polyethylene, polystyrene, polymethyl, methacrylate, polycrabonate, ABS, polyaryl sulfone, polyether sulfone, polyphenyl sulfone and polyphenylene sulfide. |
| Report: |
NASA TM-78-458 |
Pages: |
27 |
Size: |
4.84 MB |
| Title: |
Fire Detection, Extingtuishment, And Material Tests For An Automated Guideway Transit Vehicle |
| Author: |
Richard G. Hill, George R. Johnson |
| Abstract: |
Tests were conducted in a simulated automated guideway transit vehicle to determine the effectivity of a Halon 1301 fire-extinguishing system during various types of fires evaluate a photoelectric and an ionization fire detection system, and compare various materials under full-scale fire conditons. A portion of a school bus (770 cubic feet) supplied with an airflow system (300 cubic feet per minute -- 225ewcircualted and 75 fresh air) was used as the test article. Smoke density, temperature, carbon monoxide, andHalon 1301 concentrations were monitored throughout the tests. Hydrogen fluoride (HF) samples were taken during the fire extinguishing tests. The noise level associated with the activation of the explosive charge and release of the compressed gas from the 1301 reservior is high. In the experiment, levels of 120-132 decibel (Absolute) were recorded. There was no attempt to muffle this noise level to the passengers in an enclosed compartment, since this was beyond the scope of the report. A noise suppression system would most likely have to be designed for any practical applications. Halon 1301 is most effective if it is released within 1 to 2 seconds, to establsh the 5 percent by volume concentration. If slower release occurs, or if the fire is deep-seated, the Halon 1301 can be decomposed to HF, a toxic gas. In the tests, when a release time of 7 seconds occurred, the HF concentration reached dangerous conditions. Test results showed that the photoelectric detector was faster responding than the ionizaton detector. Material Tests indicated that underseat fires were more severe than fires on or in the seat for both neoprene and urethane cushions. |
| Report: |
FAA-NA-76-52 |
Pages: |
22 |
Size: |
5.13 MB |
| Title: |
Research Into Post-Crash Fires |
| Author: |
Lauren Graham |
| Abstract: |
NAFEC has several ongoing research programs in fire safety focusing on flammability, smoke and toxic gases in post-crash fires. Each program addresses one or more of these potentially lethal factors. It is important to both aircraft manufacturers and carriers that these three components of fire are dealt with together rather than separately. Studies of flammability, smoke and toxicity are each likely to result in new regulations and standards which could dramatically affect the industry. If these studies were done independently, it is conceivable manufacturers and carriers would be required to make expensive modifications three different times. FAA officials at NAFEC are well aware of this and coordinate their research so new FAA directives can be issued simultaneously. |
| Report: |
FSR-0081 |
Pages: |
17 |
Size: |
1.76 MB |
| Title: |
Fire Testing Of Cabin Materials Used In Comercial Aircraft |
| Author: |
Constantine P. Sarkos, Joe C. Spurgeon, Eldon B. Nicholas, Richard G. Hill |
| Abstract: |
The purpose of this paper is to familiarize individuals with the kinds of materials currently used in the cabin interior of a commercial airliner, to describe some of the more important fire tests used to evaluate these materials, and to summarize the behavior of these cabin materials when subjected to each of the fire test methods. Specifically, a detailed description is presented of the following respective test methods for flammability, smoke and toxic gas emissions: vertical Bunsen burner test, National Bureau of Standard (NBS) Smoke Chamber, and a combustion tube furnace test. Fire test data on 75 cabin materials are summarized for burn length, flame-out- time, specific optical density (Ds) of smoke, and yield of hydrogen cyanide (HCN) and carbon monoxide (CO). A description is given of an interim full-scale test facility that will be completed in the near future for studying the characteristics of a postcrash fire in a simulated wide-body cabin. |
| Report: |
NA-77-53-LR |
Pages: |
44 |
Size: |
3.45 MB |
| Title: |
Expermental Scaling Of Modified Fuel Breakup |
| Author: |
Thor I. Eklund |
| Abstract: |
A small-scale test configuration was developed for modified fuel breakup and ignition testing. The configuration consisted of a � fuel delivery tube within a 1-inch air atomization pipe followed by a deceleration cone. Photographic evaluation required design of a unique fuel spray photographic chamber, which has the capability of photomicrographic, schlieren, and stroboscopic photographic techniques. The chamber employs positive pressurization with diluent air spark photograph proved that the breakup pheromone can be scaled down without obliteration of the dominant rheological effects. Motion pictures of ignition show the same flammability behavior shown in larger scale tests. It is concluded that the concentric tube atomization technique provides a practical method for comparative evaluation of modified fuels on a small scale. |
| Report: |
FAA-RD-77-114 |
Pages: |
26 |
Size: |
8.50 MB |
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