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#11
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I'm pretty sure the amount of cyanide varies widely from one airplane
fire to another, but there is no time to measure it. as I understand it the HCN is produced when plastics containing nitrogen burn in an oxygen poor environment. Stuff like synthetic rubber upholstery, pulyurethane foam insulation and and melamine tray-tables As I understand it, this is akin to the major reason you're supposed to get out of a computer room if the Halon extinguishers are triggered. The Halon itself isn't particularly hazardous (at the concentrations used in these systems), but the combustion byproducts from burning plastics and etc. are really nasty. The Halon suppresses some of the flame reactions and stops the fire, but it doesn't get rid of the poisonous partially-combusted plastics and other decomposed flammables. |
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