balloon wiki:
>For the impedance converter, see the article on balun. A balloon is a flexible bag normally filled with air or gas. Some balloons are purely decorative, others are used for specific purposes. Early balloons were made of dried animal bladders.
See more at Wikipedia.org...
Hot air balloon wiki:
[ air balloons are the oldest successful human flight technology, dating back to the Montgolfier brothers' invention in Annonay, France in 1783. The first flight carrying humans was made on November 21, 1783, in Paris by Pilâtre de Rozier and the Marquis d'Arlandes. Balloons that can be propelled through the air rather than just being carried along by the wind are known as airships.
See more at Wikipedia.org...]