Fire Suppression for Aerospace Vehicles
Technical rept. 1 Jan-31 Dec 1969
BUREAU OF MINES PITTSBURGH PA SAFETY RESEARCH CENTER
Pagination or Media Count:
Fire extinguishing experiments were conducted to evaluate Halon 1301 bromo-trifluoromethane as an extinguishant of Class A fires by the total flooding mode for possible use in advanced aircraft. The effectiveness of the extinguishant was determined by burning cotton sheeting fires in a 216 cu ft chamber at various combustible loadings, preburn times, and extinguishant discharge pressures or rates. A 3 percent Halon concentration appeared to be inadequate under most test conditions. With 6 percent Halon, the toxicity hazard from the formation of CO, HF, or HBr was relatively small for preburn times of 15 seconds or less. The concentration of toxic product vapors increased noticeably when the total burning period before extinguishants was increased from 15 to 25 seconds. Under all test conditions, the toxic product concentrations reported for short exposure times. Data are also presented on the rates of pressure rise and mass consumption that characterized the cotton sheeting fires.
- Safety Engineering
- Combustion and Ignition