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NASA reschedules moon rocket’s launch for Saturday because it checks information from first attempt




NASA reschedules moon rocket’s launch for Saturday because it checks information from first attempt

A screenshot on the launch pad shows the bottom portion of the NASA Space Launch System rocket, including the four main engines of the RS-25 in its primary stage.  (NASA via YouTube)

A screenshot on the launch pad reveals the underside portion of the NASA Area Launch System rocket, together with the 4 fundamental engines of the RS-25 in its main stage. (NASA by way of YouTube)

Sooner or later after the primary launch of NASA’s Area Launch System Heavy rocket that needed to be eliminated resulting from an engine sluggishness downside, mission managers introduced that they’d attempt once more on Saturday.

Within the meantime, engineers will work out the small print of the go/no-go plan, simply in case they run into issues just like these imposed on Monday.

The launch alternative opens Saturday for 2 hours at 2:17 p.m. ET (11:17 a.m. PT) at NASA’s Kennedy Area Heart in Florida. If all programs are up and working, the liftoff marks the beginning of NASA’s Artemis 1 mission, an unmanned take a look at flight meant to pave the best way for sending astronauts to the lunar floor in mid-2020.

Some points of the countdown to Saturday’s try might be modified. For instance, job managers plan to carry out engine cooling throughout an early stage of the refueling course of. This process entails “bleeding” some liquid hydrogen gasoline into the rocket to chill the 4 fundamental engines within the main stage to the specified temperature of minus 420 levels Fahrenheit.

When the cooling system was examined in March in the course of the “Green Run” at NASA’s Stennis Area Heart in Mississippi, the process was carried out efficiently, early within the refueling course of. However when the hydrogen bleed occurred later within the countdown on Monday, a sensor indicated that one of many engines – engine quantity 3 – wasn’t cool sufficient.

The expedition administrators determined to repeat the process at Stennis.

John Honeycutt, SLS program supervisor at NASA, recommended that the issue may be within the sensor, not the hydrogen bleed system itself.


“We understand the physics of how hydrogen works,” he instructed reporters. “The way the sensor behaves does not correspond to the physics of the situation.”

Honeycutt mentioned he and his staff are engaged on a plan to confirm that the engines are correctly cooled, primarily based on a broader vary of information. He mentioned the staff most popular to keep away from having to go contained in the missile and work immediately on the sensor, which might require rolling the missile backwards from the launch pad.

“What I plan to do, with the help of the team, is to put us in a position that gives us the data we need to know that we have frozen the engines appropriately and go fly, using the data we have,” Honeycutt mentioned.

Engineers may even take a look at different considerations that surfaced throughout Monday’s countdown – for instance, a vent valve leaking within the intertank space of ​​the SLS. Launch supervisor Charlie Blackwell Thompson mentioned the leak was apparently the results of troubleshooting that was carried out on the hydrogen bleed system.

Forecasters say there’s a 40% likelihood of a suitable climate forecast on Saturday. Blackwell-Thompson mentioned that if the climate forces one other delay, one other try could possibly be made on Monday, on the finish of the Labor Day vacation.

For the Artemis 1 mission, the SLS rocket will ship an unmanned Orion spacecraft on a take a look at flight orbiting the Moon and returning to Earth to spray the Pacific Ocean. NASA’s present plan requires Artemis 2 to ship a manned Orion on a lunar flight in 2024, and Artemis 3 to hold astronauts to the lunar floor within the 2025-2026 timeframe.




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