A test study was conducted using Halon 1211 and Halon 1301 fire extinguishing agents and aerosol smoke to study their behavior in a pressurized Cessna C-421B aircraft. Halon fire extinguishers were discharged and monitored at various locations to determine the concentrations of neat halon gases present, their dissipation rates and any resultant toxic threat to the occupants. Artificial smoke was also generated at various locations and was measured at three fixed locations in the aircraft, thereby providing localized visibility information as well as ventilation data. Peak halon concentrations were considered adequate to extinguish most fires. Halon dosages for the pilot and copilot were low or zero and those for the passengers were also low in relation to the toxic limits recommended. The high ventilation rates in the cockpit area contributed to clearing smoke from the cockpit quickly. It also prevented the smoke from entering the cockpit when it was released in the passenger cabin.
Smoke and Extinguisher Agent Dissipation in a Small Pressurized Fuselage
1990
48 pages
Report
Keine Angabe
Englisch
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