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Why are hot air balloons not shaped as air planes?

April 26, 2017air Balloons hot Planes shaped

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Why are hot air balloons not shaped as air planes?

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Because air planes are kept in the air by the way air flows around and against their surfaces while a balloon is kept in the air by the air inside the balloon is lighter than the air outside it. Basically a balloon is floating in air. And a roundish shape is what allows the biggest volume inside for the least amount of surface area, meaning that you get the most lift from the least amount of cloth.