SIGN the GUESTBOOK. Hickam AFB passenger terminal has two overhead flat screen monitors, your sun clock and their arrival/departure. I was stranded there for two days and was in awe at the accuaracy of your site. I retrived your site now to plan communications with contacts in Japan.
4 - The ideal wind speed for hot air balloon flights - To provide the best conditions for a safe balloon flight landing the maximum surface wind speed on the day of the balloon ride must not exceed 10 miles an hour.
(A) hot air has a lower pressure than cold air, so hot air is drawn into the balloon by the partial vacuum inside it. (B) hot air has more inertia than cold air and doesn't accelerate easily. (C) the air pressure inside the balloon's opening is the same as the air pressure outside that opening.