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On March 19, SpaceX stacked and assembled the Starship prototype S20 with the super heavy rocket booster B4 at the beginning of this week and began to test the whole starship system < p > < / P > < p > although the combination of S20 and B4 will not take off, this is the first time SpaceX has tested a complete starship system < p > the combined starship system is about 119 meters high. It is the largest and most powerful rocket in history. S20 and B4 are estimated to weigh 4000 to 5000 tons after assembly. The 29 Raptor V1 engines can generate about 5400 tons of thrust during launch, which is greater than the previous Saturn v < p > in the first test, the test team started the QD arm (quick disconnect and propellant filling arm) to simultaneously fill S20 and B4 with ultra-low temperature liquid nitrogen and liquid nitrogen and liquid oxygen mixture as an alternative to the low temperature liquid oxygen / liquid methane propellant used in the Starship system. It is estimated that the first test filled about 25% to 50% of the cryogenic liquid for S20 and 10% to 20% of the total reserves of the booster for B4 < p > previously, S20 has completed five independent low temperature tests on the ground and successfully conducted several static ignition tests. B4 also passed several low temperature tests. Therefore, the test after the combination is not difficult for the team < p > in addition to verifying that the super heavy booster is sufficient to support the propellant filled starship, the purpose of the first test of the Starship system is to ensure that the propellant delivery system can work normally. In order for the Starship system to enter earth orbit, the staff need to transport about 1200 tons of propellant, equivalent to the weight of the whole Falcon 9 rocket, to a position 85 meters high < p > to provide fuel for the Starship requires hundreds of meters of pipes, huge valves and booster pumps to work together without leakage, blockage or icing. Therefore, the first test is also the performance test of the launch / integration tower and storage tank of the orbital launch pad < p > however, the first test is only the beginning of a long process. SpaceX is likely to schedule a series of tests on the entire starship system in the next week or two. (Chen Chen) < / P > < p >

2023-03-22 10:04:52