Something about Hot air balloons

Hot air balloons are first successful human flying effort. First balloon was made in France by Montgolfier brothers in 1786. It is made of big envelop normally made of nylon with a basket underneath. This basket is called gondola or wicker basket. A flame is lit in the bottom of balloon to produce hot air inside balloon. This hot air has l lesser density from air outside of balloon. This makes the balloon buoyant, and cause it to fly, till the bouncy is balanced.