==Gallery====See also==*Aerodyne*Aerostatics*Buoyancy*Cloud nine*Lighter than air==References====External links==*Airship resources*Aerophile web page*Tactical Aerostats*Raven Aerostar web page*DJ's Zeppelin page*"Illustrations of the Five Major Types of Lighter-Than-Air-Aircraft" "Popular Mechanics", June 1930*The principle of a balloon flight - VIDEO
" Westport, Conn.: Greenwood Press, 2003.