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NASA aims for Saturday launch of new moon rocket after fixes

Sep 2, 2022, 1:28 PM | Updated: Sep 6, 2022, 11:14 am
NASA's Artemis I rocket sits on launch pad 39-B at Kennedy Space Center on Aug. 30, 2022, in Cape C...
NASA's Artemis I rocket sits on launch pad 39-B at Kennedy Space Center on Aug. 30, 2022, in Cape Canaveral, Florida. The Artemis I launch was scrubbed Monday after an issue was found on one of the rocket's four engines. The next launch opportunity is on Sept. 2. (Photo by Joe Raedle/Getty Images)
(Photo by Joe Raedle/Getty Images)

CAPE CANAVERAL, Fla. (AP) — NASA aimed for a Saturday launch of its new moon rocket, after fixing fuel leaks and working around a bad engine sensor that foiled the first try.

The inaugural flight of the 322-foot (98-meter) rocket — the most powerful ever built by NASA — was delayed late in the countdown Monday. The Kennedy Space Center clocks started ticking again as managers expressed confidence in their plan and forecasters gave favorable weather odds.

Atop the rocket is a crew capsule with three test dummies that will fly around the moon and back over the course of six weeks — NASA’s first such attempt since the Apollo program 50 years ago. NASA wants to wring out the spacecraft before strapping in astronauts on the next planned flight in two years.

NASA Administrator Bill Nelson said he’s more confident going into this second launch attempt, given everything engineers learned from the first try.

So is astronaut Jessica Meir, who’s on NASA’s short list for one of the initial moon crews.

“We’re all excited for this to go, but the most important thing is that we go when we’re ready and we get it right, because the next missions will have humans on board. Maybe me, maybe my friends,” Meir told The Associated Press on Friday.

The engineers in charge of the Space Launch System rocket insisted Thursday evening that all four of the rocket’s main engines were good and that a faulty temperature sensor caused one of them to appear as though it were too warm Monday. The engines need to match the minus-420 degrees Fahrenheit (minus-250 degrees Celsius) of the liquid hydrogen fuel at liftoff, otherwise they could be damaged and shut down in flight.

“We have convinced ourselves without a shadow of a doubt that we have good-quality liquid hydrogen going through the engines,” said John Honeycutt, the rocket’s program manager.

Once fueling begins Saturday morning, the launch team will perform another engine test — this time earlier in the countdown. Even if that suspect sensor indicates the one engine is too warm, other sensors can be relied on to ensure everything is working correctly and to halt the countdown if there’s a problem, Honeycutt told reporters.

NASA could not perform that kind of engine test during dress rehearsals earlier this year because of leaking fuel. More fuel leaks cropped up Monday; technicians found some loose connections and tightened them.

The engine-temperature situation adds to the flight’s risk, as does another problem that cropped up Monday: cracks in the foam insulation of the rocket. If any foam pieces break off at liftoff, they could strike the strap-on boosters and damage them. Engineers consider the likelihood of that happening low and have accepted these slight additional risks.

“This is an extremely complicated machine and system. Millions of parts,” NASA’s chief, Nelson, told the AP. “There are, in fact, risks. But are those risks acceptable? I leave that to the experts. My role is to remind them you don’t take any chances that are not acceptable risk.”

The $4.1 billion test flight is NASA’s first step in sending astronauts around the moon in 2024 and landing them on the surface in 2025. Astronauts last walked on the moon in 1972.

___

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.

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NASA aims for Saturday launch of new moon rocket after fixes