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par Laurent Simon Mar 4 Juil 2017 - 15:13Echec du 2e lancement, du lanceur Longue Marche 5
le 2 juillet
http://aviationweek.com/space/long-march-5-failure-casts-doubt-chinese-space-schedule
"Failure of a Long March 5 launcher on the type’s second mission has dealt a possibly severe blow to China’s space program, at least casting doubt over the timing of planned missions that rely on the rocket.
The unexplained launch failure on July 2 has also ruined an attempt at testing an important new spacecraft bus while also putting an end to the quantum-technology communications satellite based on that bus.
Long March 5s, China’s largest rockets, are supposed to launch the Chang’e 5 lunar probe this year and the first module of China’s planned space station next year; the timing of both missions cannot now be assured.
Furthermore, two other new Chinese launchers plus another soon to enter development share much technology with the Long March 5, notably engine components, raising the possibility that the launch failure has implications for them.
... The payload of the failed mission was the Shijian 18 geostationary satellite, built on the DFH-5 bus, which was to go into orbit for the first time. Exploiting the capacity of the big new bus, Shijian 18 had a weight of 7 metric tons.
Apart from quantum communications technology, it featured a new type of Hall-effect electric thruster"
le 2 juillet
http://aviationweek.com/space/long-march-5-failure-casts-doubt-chinese-space-schedule
"Failure of a Long March 5 launcher on the type’s second mission has dealt a possibly severe blow to China’s space program, at least casting doubt over the timing of planned missions that rely on the rocket.
The unexplained launch failure on July 2 has also ruined an attempt at testing an important new spacecraft bus while also putting an end to the quantum-technology communications satellite based on that bus.
Long March 5s, China’s largest rockets, are supposed to launch the Chang’e 5 lunar probe this year and the first module of China’s planned space station next year; the timing of both missions cannot now be assured.
Furthermore, two other new Chinese launchers plus another soon to enter development share much technology with the Long March 5, notably engine components, raising the possibility that the launch failure has implications for them.
... The payload of the failed mission was the Shijian 18 geostationary satellite, built on the DFH-5 bus, which was to go into orbit for the first time. Exploiting the capacity of the big new bus, Shijian 18 had a weight of 7 metric tons.
Apart from quantum communications technology, it featured a new type of Hall-effect electric thruster"
