virtual office jakarta timur .adv - Montgolfier brothers were 2 of the 16 children of Pierre Montgolfier, whose thriving paper factories in the town of Vidalon, near Annonay, in southern France, ensured the financial support of their balloon experiments. While carrying on their dad's paper business, they kept their interest in clinical experimentation.
In 1782 they found that heated air, when gathered inside a big lightweight paper or fabric bag, caused the bag to rise into the air. The Montgolfier brothers made the very first public demo of this discovery on June 4, 1783, at the marketplace in Annonay. They filled their balloon with heated air by burning straw and wool under the opening at the bottom of the bag. The balloon increased into the air about 3,000 feet (1,000 metres), stayed there some 10 minutes, then settled to the ground more than a mile and a half from where it increased.
The Montgolfier brothers traveled to Paris then to Versailles, where they repeated the try out a bigger balloon on Sept. 19, 1783, sending a sheep, a rooster, and a duck aloft as travelers. The balloon floated for about 8 minutes and landed securely about 2 miles (3.2 kilometres) from the launch site. On Nov. 21, 1783, the first manned untethered air travel occurred in a Montgolfier balloon with Pilatre de Rozier and François Laurent, marquis d'Arlandes, as travelers. The balloon sailed over Paris for 5.5 miles (9 kilometres) in about 25 minutes.
The Montgolfier brothers were honoured by the French Académie des Sciences. They published books on aeronautics and continued their clinical professions. Joseph created a calorimeter and the hydraulic ram, and Étienne developed a process for manufacturing vellum.
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