[LINK] FW: home emergencies

[Danny Yee]

Ash Nallawalla wrote:
> > Mr Ropar, sobbing at times, said it took just two minutes for the 
> > flames to travel 20km, roar up the Sherwin Ranges and explode over the
> > top.
> 
> Which was calculated by Karl to be 600 km/h.

Is that completely impossible?  With a crown fire spreading by radiant
heat, I don't see why the wind speed is necessarily a limitation.

It's probably not possible in practice for the heat pulse from an
exploding crown to set off nearby trees all by itself, but I can't
see a basic physics proof of that.

Danny.