In reply to RC Macaulay's message of Fri, 29 Dec 2006 16:00:35 -0600: Hi, [snip] >Interesting question. Consider the thermal updrafts that occur during huge >forest fires. I have noticed TV news live vid of vertical vortex forming that >eyeball measure some 5000 ft high. In an instant of 1 to 3 seconds , a fire >cone accelerates up the vortex. I have noticed this in several vids of forest >fires in extreme mountanous terrain. Calculating the eyeball height of the >cone and the time duration makes the fire travel some 2500- 5000 feet per >second.... Naw !, It can't be... Something is taking place I don't understand. [snip] Footage I have seen of forest fires on TV has never shown a flame more than twice the height of the trees. 2500-5000 feet is up in the clouds. Can you find an instance of the coverage that you refer to on the web?
Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
