Hot Air Balloon Day - Today is Hot Air Balloon Day!
The hot air balloon is the oldest successful human-carrying flight technology. It is part of a class of aircraft known as balloon aircraft.
On November 21, 1783, in Paris, France, the first untethered manned flight was made.
Hot air balloons that can be propelled through the air rather than just being pushed along by the wind are known as airships or, more specifically, thermal airships.
A hot air balloon consists of a bag called the envelope that is capable of containing heated air. Suspended beneath is a gondola or wicker basket (in some long-distance or high-altitude balloons, a capsule), which carries passengers and (usually) a source of heat—in most cases an open flame. The heated air inside the envelope makes it buoyant since it has a lower density than the relatively cold air outside the envelope.
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