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Share with friends and circle of friends with wechat scan QR code_ blank" href=" https://news.163.com/news/search?keyword=SpaceX "> SpaceX < / a > for its interstellar < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E9%A3%9E%E8%88%B9 "> the spaceship < / a > prototype has carried out the fourth high altitude flight test. Unfortunately, sn11 in < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E7%9D%80%E9%99%86 "> there was an explosion in the air before landing < / a >. But Elon, CEO of SpaceX · < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E9%A9%AC%E6%96%AF%E5%85%8B "> Elon Musk said the company will continue testing and sn15 will be sent to the launch pad in a few days. The SpaceX prototype, about 50 meters high, took off from the Texas proving ground at 8 a.m. on Tuesday, according to live video of SpaceX's test flight. Due to the dense fog covering the launch base, the ground camera can hardly see sn11. However, the cameras on the prototype sent back live images of its three Raptor engines and aerodynamic tails. As sn11 climbs to an altitude of about 10 kilometers above the fog layer on the ground, the three Raptors' engines shut down in a planned sequence, allowing the spacecraft to make a so-called "belly flip" to land back on the ground. < / P > < p > the camera image in the engine cabin of sn11 shows that the Raptor engine is starting the landing procedure, but when the task clock shows 5 minutes and 49 seconds, the video freezes quickly. It's not known what's wrong, but there are two obvious possibilities. First, sn11 may have failed to re ignite two or even all three Raptor engines, triggering the onboard flight termination system (FTS), which is designed to prevent < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E7%81%AB%E7%AE%AD "> rocket < / a > deviates from safe operation area. Secondly, sn11 encountered a major failure in the re ignition and abdominal overturning attempt, which almost immediately triggered an explosion, tearing the rocket about 800 meters above the launch pad and landing area. < / P > < p > musk said that one of the Raptor engines "had problems during ascent" and "did not reach the cabin pressure" during landing combustion. Although these problems are worthy of attention, they are not enough to explain the cause of the air explosion. The ground camera failed to capture the descent process of sn11, but the image showed that the debris of the spacecraft landed near the landing platform shortly after the onboard video of SpaceX was cut off. < / P > < p > sn11 is the fourth full-scale starship prototype launched by SpaceX at the Texas proving ground. SpaceX conducted three high-altitude tests in December last year, February this year and early March this year respectively, but these prototypes eventually exploded. However, these failures did not seem to have discouraged musk, who said SpaceX intends to complete the assembly of sn15 in a few days and send it to the launch pad earlier than expected. < / P > < p > although musk did not disclose too many details, he reiterated that sn15 will bring substantial upgrades, and said that "it has hundreds of design improvements in structure, avionics and software, and engine", which are expected to alleviate all the problems leading to the premature explosion of sn11. "High productivity can solve many problems," Musk tweeted < / P > < p > musk also talked about SpaceX's near-term plans after the upgrade of sn15, confirming that SN20 and future starship prototypes will have more improvements, and can even be "in orbit". This seems to outline three stages of the evolution of the Starship prototype, the first stage from SN8 to sn11, the second stage from sn15 to sn19, and the third stage for SN20 and its successors, which will be ready for the real orbital test flight. At the same time, SpaceX is accelerating the assembly of a super heavy rocket booster called bn1 to help launch orbital class starships. Musk said parts for the second super heavy rocket booster are being manufactured but have not yet been assembled. SpaceX's goal is to launch the first ultimate prototype spacecraft from South Texas in July, which consists of a super heavy rocket booster and a starship. "This is one of our most important goals right now," Musk said (small)

2023-03-22 10:04:31