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This is a list of aviation-related events during the 18th century (January 1, 1701 – December 31, 1800): ==1700s-1770s== *1709 * *August 8, Portuguese Father Bartolomeu de Gusmão demonstrates a practical model of a hot-air balloon made of a paper envelope with burning material suspended below it to King John V of Portugal in the Ambassadors drawing room. Worried that it will set fire to the curtains, servants end its flight by dashing it to the ground. It is the first known demonstration of a practical lighter-than-air craft.〔Mondey, David, ed., ''The Complete Encyclopedia of the World's Aircraft'', Secaucus, New Jersey: Chartwell Books, Inc., 1978, ISBN 0-89009-771-2, p. 9.〕 *1716 * * Well thought-out glider-project of the Swedish scholar Emanuel Swedenborg. Basis for his construction are bird flight and the glider kite. *1738 * *In his ''Hydrodynamica'' the Swiss scholar Daniel Bernoulli (1700–1782) formulates the principle of the conservation of energy for fluids (Bernoulli's principle), the relationship between pressure and velocity in a flow. *1746 * *English military engineer Benjamin Robins (1707–1751) invented a whirling arm centrifuge to determine drag. *1766 * *British chemist Henry Cavendish determines the specific weight of hydrogen gas. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Timeline of aviation – 18th century」の詳細全文を読む スポンサード リンク
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