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𝙃𝙤𝙩 𝙖𝙞𝙧 𝙗𝙖𝙡𝙡𝙤𝙤𝙣.

𝙰𝙻𝙻 𝚃𝙷𝙸𝙽𝙶𝚂

[A short video of Hot Air Balloon]

A hot-air balloon is a aircraft consisting of a bag, called an envelope, which contains heated air. Suspended beneath is a gondola or wicker basket, which carries passengers and a source of heat, in most cases an open flame caused by burning liquid propane. The heated air inside the envelope makes it buoyant, since it has a lower density than the colder air outside the envelope. As with all aircraft, hot-air balloons cannot fly beyond the atmosphere. The envelope does not have to be sealed at the bottom, since the air inside the envelope is at about the same pressure as the surrounding air. In modern sport balloons the envelope is generally made from nylon fabric, and the inlet of the balloon is made from a fire-resistant material such as Nomex. Modern balloon have been made in many shapes, such as…

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