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No surprise here: The scheduled June 2020 first unmanned launch of NASA’s Space System Launch (SLS), already delayed by three years, appears threatened by more delays.
[NASA needs to perform]a similar structural test of the liquid oxygen fuel tank before what is known as a “green run” test. For this exercise, NASA will assemble the two large tanks and then integrate them with the rocket’s four main RS-25 engines. Then, at a test stand in southern Mississippi, the rocket will fire its engines through a standard launch of the rocket.
NASA has yet to formally set a date for this “green run” test, but whenever it does occur will be a key indicator for when we will see the first actual launch of the SLS rocket. If the green run test is conducted late in 2019, there would still be a chance for a 2020 launch. However, the agency and its prime contractor for the core stage, Boeing, are on a tight timeline that has little margin for technical problems that might occur during the structural tests of the tank or the green run tests. Historically, during this integration and test process with other large rocket programs, major problems have often occurred.
It is not clear how deeply the shutdown affected the SLS timeline, even though core stage work did proceed. “The shutdown impacted at least day for day,” one source said of the schedule. “But I am sure it was more than that.”
NASA originally planned to launch the SLS rocket on its maiden flight in November 2017, so the rocket will now be at least three years later than originally anticipated. The program’s budget is more than $2 billion a year, so these delays have cost the agency considerably.
The article also outlines the problems NASA is having developing the rocket’s upper stage.
I predict that the June 2020 launch will slip, maybe as much as six months, into 2021. This means the first manned flight will also be delayed into 2024, at the earliest.
That means it will have taken NASA more than twenty years and more than $60 billion to build and fly a single manned mission. Moreover, the cost and difficulty of operating SLS will make it impossible to get the second manned flight off the ground any earlier than three to four years later, at the earliest.
There is no chance the U.S. will put new footprints on the Moon if it continues to rely on this boondoggle. Worse, a continued reliance on SLS will force the government, for political reasons, to use its power to squelch competing private efforts, something we are seeing with the endless delays NASA has imposed on the commercial crew program.