Reporting a valve problem, NASA will only launch the SLS spacecraft in the next numerical test – Spaceflight Now

NASA’s Space Launch System is on class 39B at Kennedy Space Center. Courtesy: NASA / Joel Kowsky

The problem with the helium valve on the Moon rocket Space Launch System will require global companies to install a large propeller with cryogenic catalysts during the preparation of future costumes, said NASA officials on Saturday.

Instead of fully launching the two parts of the cryogenic hydrogen and water oxygen rocket, NASA will focus solely on launching propellants at the base base, the most important part of the massive launch vehicle.

NASA also confirmed the teams this time on Friday for the next time to launch cryogenic spacecraft on the Space Launch System moon rocket at Kennedy Space Center. Three days after this was originally planned.

The preparation of the “transforming” wet cloth will have “low propellant activity” at the SLS interim cryogenic propulsion stage, NASA said in a press release on Saturday. NASA officials decided Friday to postpone the cryogenic tanking operation from Monday to Friday, but did not announce the decision until Saturday.

A “call to center” was scheduled in the shooting range at Kennedy Space Center for Tuesday, leading up to the tanking Thursday morning.

“The adaptation test will be able to achieve critical testing goals to start the industry,” NASA said.

NASA said engineers had noticed a helium check valve problem with the SLS’s high -end level, but the agency did not know if the valve was on the rocket or in the release tower. phone and pad 39B. As a result, NASA said it would not fill the surface with cryogenic propellers “to ensure the safety of the aircraft.”

The valve is part of the cryogenic propulsion stage, but not in the field’s RL10 engine, according to Madison Tuttle, a NASA spokesman.

Earlier this week, NASA said it had trouble maintaining the helium cleaning pressure on the Aerojet Rocketdyne RL10 engine at high altitude, after a regulator was replaced at a mobile broadcasting station on the pad. The platform was built by the United Launch Alliance, and is a modified version of the platform that was flown aboard the ULA commercial Delta 4-Heavy rocket.

The base was built by Boeing, and operated by four RS-25 engines left over from the aircraft system.

The entire rocket contains 755,000 gallons of cryogenic catalysts when fully charged. There are 22,000 gallons on the top floor, and there are 733,000 gallons in the original tanks.

The Interim Cryogenic Propulsion Stage, or ICPS, for the first SLS test flight was filmed in 2018 at the United Launch Alliance’s Horizontal Integration Facility in Cape Canaveral. Found: NASA / Ben Smegelsky

The problem with the helium check valve was related to a helium cleaning problem on Friday, Tuttle said. Engineers and engineers resumed inspection and crisis management on Friday before officials decided to reschedule the cryogenic tanking operation for Friday, and abandon the attack on the tanker. high ground.

“Helium is used for a variety of purposes, including cleaning the engine, or cleaning the lines, before loading the propellants during tanking, and melting the propellant. , “said NASA. “A check valve is a type of valve that allows water or gas to flow in one direction and prevent backflow. The helium check valve is three inches long and prevents helium from escaping from the rock.

NASA originally planned to launch cryogenic missiles into the SLS moon rocket last Sunday, April 3. But a problem with the missiles on the pad prompted officials to delay trial until Monday, when the global system problems are fixed.

On Monday evening, engineers began injecting water oxygen into the base, but a hand -held valve incorrectly placed on the pad prevented the injection of hydrogen water, and the engine stopped. NASA’s publishing team in statistical testing.

When the tanking test is complete and officers are satisfied with achieving all the required objectives, NASA’s advocacy team will discharge propellants from base base and set up the rocket and Orion crew capsule for return. to the Car Club for final testing, inspection, and pre -preparation. released on the Artemis 1 test flight around the moon.

NASA said engineers could replace the valve, if necessary, when the rocket returned to the facility. “The companies are relying on the ability to replace the valve back to the VAB,” the company said.

The Artemis mission 1 is the first test flight for NASA’s Artemis moon project. The test flight was an unshakable flight for the Orion aircraft, and the first flight of the SLS heavy-lifter, before the astronauts boarded for the upcoming Artemis mission.

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Follow Stephen Clark on Twitter: @ StephenClark1.

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