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Santos-Dumont number 6
The Santos-Dumont No. 6 was an airship designed and built by the Brazilian pioneer aviator Alberto Santos-Dumont. In 1901 it was used by him to win the Deutsch de la Meurthe prize for a return from Parc Saint Cloud to the Eiffel Tower and back. It is considered by many to be the first truly successful airship.
==Background==
In April 1900, Henri Deutsch de la Meurthe offered the Deutsch de la Meurthe prize, also simply known as the "Deutsch prize", of 100,000 francs to the first machine capable of flying a round trip from the Aéro-Club de France's flying field at Parc Saint Cloud to the Eiffel Tower in Paris and back in less than thirty minutes. The winner of the prize needed to maintain an average ground speed of at least to cover the round trip distance of in the allotted time. The prize was to be available from May 1, 1900 to November 1, 1901.
To win the prize, Alberto Santos-Dumont decided to build dirigible No. 5, a larger craft than his earlier designs. On August 8, 1901 during one of his attempts, the airship began to lose gas, causing the envelope to lose shape and making it necessary to shut down the engine, which also powered the ventilator which inflated the internal ballonet. It started to descend and was unable to clear the roof of the Trocadero Hotel. Santos-Dumont was left hanging in a basket from the side of the hotel. With the help of firemen he escaped without injury, but the airship was a write-off, only the engine being salvaged.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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