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First ignition failure of us lunar rocket: one engine scrapped

via:快科技     time:2021/1/17 23:39:53     readed:82

On January 17, local time, NASA conducted the first hot spot fire test of SLS (space launch system) rocket, which is also the last step of the series of tests. Unfortunately, the test failed, casting a shadow on the US manned lunar landing program.

The SLS rocket is far more powerful than Saturn 5 in the Apollo moon landing program. It is about 98 meters high and equipped with four rs-25 engines. It can hold 537000 gallons of liquid helium (about 2030 cubic meters) and 196000 gallons of liquid oxygen (about 740 cubic meters). It can fill 63 oil tankers. It can generate up to 2 million pounds (about 910 tons) of thrust and deliver 24 tons of load to the moon.

NASA plans to return to the moon in 2024 and land a female astronaut on the moon for the first time, using the SLS rocketAnd Orion, the Artemis mission.

The ignition test was conducted at the Stannis space center near St. Louis Bay, Mississippi, USA. The main body of the test is the 212 foot (about 64.6 m) high SLS rocket core stage, which is full of liquid oxygen and liquid hydrogen fuel. It is planned to generate 1.6 million pounds (about 725 tons) of thrust. The four engines are planned to ignite continuously for 8.5 minutes, which is basically consistent with the official launch simulation.

As a result, the ignition only lasted more than one minute, and it was terminated ahead of time.

NASA also did not disclose the specific reasons, only said that it was investigating and analyzing the data, and would also re check the core level and four engines before entering the next stage.

Some professionals pointed out that,67 seconds after the SLS first stage ignition, one of the engines was damaged, triggering the MCF (important hardware damage), and the mission was terminated.

More seriously,If SLS rocket wants to make its first flight this year, it must leave Stannis Space Center and go to Cape calaveral launch base in Florida for final assembly before February, but it is obviously too late.

However, NASA officials stressed that the plan to return to the moon in 2024 remains unchanged.

At present, NASA has produced 16 rs-25 engines, which can be used for four missions, but if they are scrapped, they must be produced again.

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