[LINK] FW: home emergencies

[Karl Auer]

On Fri, 2009-02-20 at 11:32 +1100, Birch, Jim wrote:
> > Assuming a 100kph wind, even an ember would take at least twelve
> minutes to travel 20 kilometres. Upon landing, it would typically be many
> minutes before a good blaze got going.
> 
> Assuming thousands of embers are landing on dry fuel in strong winds I
> expect this process can ramp up an order of magnitude or two.

Two? If it took (say) 10 minutes to get going on material X with no
wind, you reckon that wind could get it down to one minute? Maybe
(though I doubt it), but 6 seconds is definitely not going to happen.

Then you have to add the time required for the fire to get big/visible
as more than smoke.

Regards, K.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer at biplane.com.au)                   +61-2-64957160 (h)
http://www.biplane.com.au/~kauer/                  +61-428-957160 (mob)

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