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Geebax Posted at 2017-7-26 19:02
That's fine, but the US and the FAA are not all of the world, and hopefully in other parts of the world they will be better advised by someone who pays attention to basic chemistry, that says water and lithium don't mix well.
Aloha Geebax,
Actually both articles point out the problem with lithium, water and hydrogen. The FAA video recommends putting the fire out with the Halon extinguisher and then using water to cool the battery cell so it does not ignite an adjacent cell. The Halon extinguisher cannot cool the battery but water can. But, this is to the point that you should not use ice or crushed ice because you then get the igloo effect of insulating the heat and blowing the next cell anyway. Then you are back to square 1 again.
My take on the second video was their comment about not using water to cool the battery was to sell their type of extinguisher. Both videos are right but water is a commercial basketball in the second one. The FAA is saying to use enough water to cool the battery once the fire is already out. The second video is saying if you do not cool the battery enough (like the FAA is saying you should do), then you could get a reignition of the fire. This is true, but if you look at the FAA video, they use an awful lot of water! Now I know why.
Aloha and Drone On! |
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