for fire you need 3 thinks

oxygen/heat and somethink that can be burned

with out one of this three you dont have fire.

co2 takes out heat /but cools down heated parts fast(no good on metal)

water takes out heat!

spread water over fire takes out oxygen!

foam on fire takes out oxygen!

halon takes out OXYGEN so : no good in open space

is good in closed spaces that gives time to take out the heat from the sides (walls maybe) of this closed space.

one other think is that halon will give you canser in a few sec. that smoking of 20years/


bottom end: CO2 ONLY

....also when you have a fire in an airframe first put it out and after if you wish shut down the engine/

cose if you shut down engine while there is a fire going on afer the flame out you have a big fan feed oxygen till rpms will drop than gases with out oxygen

Philip please make your self a favor and go to your fire department/ask them how dangerus is halon for health...they will explane it better than me

sorry 4 the bad english

my 2c