In reply to Jed Rothwell's message of Sun, 6 Feb 2011 02:16:19 -0500: Hi, [snip] >they could crash spectacularly or that in hot weather with low air pressure >they could not fly. [snip] If you look at a barometer you will see that hot weather almost invariably comes with high (not low) air pressure.
Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html