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8 ore fa · In 1872, Paul Haenlein flew an airship with an internal combustion engine running on the coal gas used to inflate the envelope, the first use of such an engine to power an aircraft. Charles F. Ritchel made a public demonstration flight in 1878 of his hand-powered one-man rigid airship, and went on to build and sell five of his aircraft.
1 giorno fa · Utah ( / ˈjuːtɑː / YOO-tah, / ˈjuːtɔː / ⓘ YOO-taw; Navajo: Áshįįh Biiʼtó Hahoodzo[citation needed]) is a landlocked state in the Mountain West subregion of the Western United States. It borders Colorado to its east, Wyoming to its northeast, Idaho to its north, Arizona to its south, and Nevada to its west.
- 84,899 sq mi (219,887 km²)
