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How Skywriting Works

Stuff You Should Know

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How to Fly Through Your Old Letters and Start Over

The letters themselves always wonder from the ground, like how big they are. It's a paraffin oil, liquid paraffin basically. In order to reach that smoke point, needs to hit the engine at 1500 degrees. And then it is just spit out through the exhaust. Apparently, the letters are about a mile high and once the smoke expands, about 75 feet wide.

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