Montgolfier brothers filled balloon he had developed. In early 1784, the Flesselles balloon, named after the unfortunate Jacques de Flesselles, later to be an early casualty at the Bastille, gave a rough landing to its passengers. In June 1784, the Gustave (a hot air balloon christened La Gustave in honour of King Gustav III of Sweden's visit to Lyon ) saw the first (singing) female aeronaut, Élisabeth Thible. Both brothers invented a process to manufacture transparent paper looking like vellum, reproducing the technique of the English, followed by the papermakers Johannot and Réveillon. In 1796, Joseph Michel Montgolfier invented the first self-acting
Hot air balloon course) stated in the previous section. Liftoff would require a slightly greater temperature, depending on the desired rate of climb. In reality, the air contained in the envelope is not all the same temperature, as the accompanying thermal image shows, and so these calculations are based on averages. For typical atmospheric conditions (20 °C, 68 °F), a hot air balloon heated to (99 °C, 210 °F) requires about 3.91 m³ of envelope volume to lift 1 kilogram (62.5 ft³/lb). The precise amount of lift provided depends not only upon the internal temperature mentioned above, but the external temperature, altitude above