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Artemis 1 Cryo Demonstration Take a look at

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Screenshot of NASA’s YouTube broadcast of Artemis 1 Cryo Loading Take a look at. Photograph Credit score: YouTube

7: 15 AM ED Wednesday, September 21, 2022

Awaiting KSC Launch Director Charlie Blackwell Thompson to present permission to start cryo loading. NASA might be utilizing it’s new “Kindler, Gentler” cryo loading process as we speak. This take a look at is being broadcast on NASA’s YouTube channel.

Observe: This put up might be up to date periodically throughout as we speak’s Artemis 1 cryo loading take a look at of the liquid hydrogen and oxygen tanks.

As soon as each of the liquid oxygen (LOX) and liquid hydrogen (LH2) tanks are absolutely loaded, the take a look at might be accomplished. That is anticipated to happen at round 3 PM EDT. The strong rocket boosters and the Orion spacecraft won’t be powered-up throughout as we speak’s take a look at. That is solely about loading-up the cryo tanks.

There a difficulty of {the electrical} room pressurization, positioned on the Cellular Launch Platform. The room is pressurized with inert gasoline, nitrogen, previous to cryo loading. That concern has been fastened. As soon as the workforce that fastened it’s again, cryo loading will start.

7:32 AM EDT

KSC’s Artemis Launch Director Charlie Blackwell Thompson has given the “Go” to being the cryo loading take a look at.

One of many objectives of this take a look at might be to check the cryo loading procedures which can be designed to be much less demanding on. the launch car. This can imply that absolutely loading each of the LOX and LH2 tanks will take a further half-hour.

7:36 AM EDT

Starting of the cryo loading take a look at is a bit late. This is because of one of many members of a workforce that went out to repair an issue with the inerting of {an electrical} room positioned on the Cellular Launch Platform (MLP) not be accounted for in clearing the blast space. This particular person was simply exterior the blast space, an space that have to be cleared for cryo loading to start. A safety guard was despatched out to get this particular person away from the world.

7:39 AM EDT

Circulation pumps and heaters have been turned-on. The valves for the liquid oxygen and liquid hydrogen are being ready to open. The bottom launch sequencer pc (GLS) is now on.

7:42 AM EDT

The chilliness-down of the strains to the hydrogen cryo sphere have begun.

The LH2 cryo sphere can maintain 900,000 gal. A brand new LH2 cryo sphere is beneath development.

The Artemis Core Stage is 212 toes tall. The capability of its tanks are:
537,000 gal of LH2
196,000 gal of LOX

LOX loading is the long-pole in cryo loading and can take 3 hours.

7:54 AM EDT

Chill-down of the strains that run from the LOX cry sphere has begun. This can be a 15 minute operation.

8:42 AM EDT

Sluggish fill of loading of the liquid of the liquid oxygen tank has begun.

Simply acquired “Go” to chilling down the strains that run from the LH2 cryo sphere.

9:09 AM EDT

Liquid Hydrogen tank on the Artemis 1 Core Stage is now in gradual fill.

Liquid oxygen tank continues in gradual fill.

9:25 AM EDT

LOX tank stands at 16% full. The LOX pumps are going to be slowed a bit there are necessities on how full the LOX tank may be relative to the LH2 tank for the reason that LOX tank is atop the LH2 tank.

uScreenshot from NASA YouTube Channel Masking Cryo Demonstration Take a look at. Photograph Credit score: YouTube/NASA.

Attention-grabbing observe. LH2 tank isn’t stuffed with pumps however with stress from LH2 increasing because it heats in transit.

Picture from the Tail Service Umbilical Mast. Photograph Credit score: YouTube/NASA

9:50 AM EDT

The LOX tank on the Artemis 1 Core Stage is 32% full.

LH2 slow-fill began at 9:09 AM EDT. The filling over the last 42 minutes has been slower than anticipated.

A temp sensor on inlet facet of the underside of the Artemis 1 Core Stage, which is used to permit fast-fill of LH2, was giving uncommon readings. The launch workforce decided that the sensor was defective and switched to a backup sensor. Quick-fill of the LH2 tank is about to start quickly.

10:00 AM EDT

Cease-flow on the LH2 tank on the SLS Core Stage simply introduced.

10:01 AM EDT

A hydrogen leak was detected within the cavity the place the LH2 enters the Core Stage on the 8″ fast disconnect. The studying was 7% hydrogen. When stop-flow was completed, the lead detection went away.

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