What material was used to reinforce the opening/mouth of the balloon structure?
Answer
Hoops of wicker
The structural integrity of the base of the Montgolfier balloon was crucial for maintaining the shape required to effectively channel the hot air generated by the fire source. Specifically, the opening or mouth of the envelope, where the heat was introduced from below, was reinforced using hoops made of wicker. This wicker reinforcement served the function of keeping the opening wide and open, thereby allowing for the efficient introduction of the heated air generated by burning straw and wool, ensuring the envelope could inflate properly.
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