Gown rehearsal for NASA’s Artemis moon launch slips from February to March

A crucial costume rehearsal countdown and fueling check of NASA’s gargantuan new House Launch System moon rocket is slipping from later this month to March to present engineers extra time to finish last preparations, NASA officers stated Wednesday. The delay means the rocket’s maiden flight doubtless will slip into April if not later.

Throughout a teleconference with reporters, Tom Whitmeyer, deputy chief of NASA’s exploration directorate, declined to supply a selected goal date for the SLS rocket’s long-awaited first flight, saying engineers must get via the “moist costume rehearsal” first.

“We actually wish to see the outcomes of that check earlier than we are able to … predict with a great quantity of confidence the time frame earlier than we launch,” he stated.

An artist’s impression of a House Launch System rocket atop pad 39B on the Kennedy House Middle awaiting liftoff to the moon.


Sources say rollout to pad 39B on the Kennedy House Middle for the moist costume rehearsal may come as early as March 8. However Whitmeyer would solely say the two-week check is now focused for March.

As a result of the SLS have to be hauled again to Kennedy’s Automobile Meeting Constructing for post-test processing, launch on the Artemis 1 mission — a flight to ship an upiloted Orion crew capsule past the moon and again — doubtless will slip to someday throughout a interval that opens April 8 and closes April 23. The following launch interval after that runs from Could 7 to Could 21.

As for what prompted the delay to March for the moist costume rehearsal, Mike Bolger, supervisor of exploration floor programs on the Kennedy House Middle, stated “there actually is not a big factor that we’re engaged on, it is only a quantity of labor and it is us being actually meticulous and ensuring that after we roll, we’re prepared.”

He stated the chairman of NASA’s Aerospace Advisory Panel identified throughout a latest assembly that “in case you miss your launch date and you’ve got a profitable launch, no person’s going to recollect you missed your launch date. However in case you maintain your launch date and you’ve got an unsuccessful launch, no person’s ever going to neglect.”

“I believe that is precisely how we deal with it,” Bolger stated. “We’re discovering that proper steadiness of continuous to push to get this launched as quickly as we’re prepared, however not earlier than.”

Deal with with care: final June, the SLS core stage, with 4 RS-25 engines at its base, is lowered into place for attachment to a pair of solid-propellant boosters. The engines and booster will present a mixed 8.8 million kilos of thrust at liftoff.


Working years not on time, Artemis 1 is the primary flight for NASA’s new moon rocket, a mission that may check the SLS booster and Orion capsule in flight earlier than astronauts strap in for a piloted voyage across the moon in mid 2024.

The flight after that, Artemis 3, will carry the first lady and the primary particular person of shade to the moon within the 2025 timeframe. After rendezvousing with a SpaceX touchdown craft, the astronauts will descend to landing close to the lunar south pole to develop into the primary people to stroll on the moon because the last Apollo mission in 1972.

However first, NASA should perform a fancy collection of checks to confirm the efficiency of of the SLS, the Orion spacecraft and the bottom programs required for servicing and launch.

The preliminary “block 1” model of SLS would be the strongest rocket ever launched, standing 322 toes tall and tipping the scales at 5.75 million kilos when absolutely fueled. Its twin shuttle-heritage solid-propellant boosters and 4 upgraded area shuttle principal engines will produce 8.8 million kilos of thrust at liftoff, 15% greater than NASA’s legendary Saturn 5 moon rocket.

The SLS can also be probably the most costly rockets ever constructed. NASA’s Workplace of Inspector Common reported final yr that NASA can have spent almost $30 billion on the SLS program via 2025. The primary 4 Artemis moon flights are estimated to price within the neighborhood of $4.1 billion every.

The block 1 SLS is made up of an enormous 212-foot-tall Boeing-managed “core stage” with its 4 Aerojet Rocketdyne RS-25 principal engines and a 45-foot-tall interim higher stage powered by a single Aerojet Rocketdyne RL10B engine.

Two five-segment Northrop Grumman strong rocket boosters, producing 3.6 million kilos of thrust every, are connected to the aspect of the core stage.

An artist’s impression of the SLS booster throughout rollout from the Automobile Meeting Constructing to pad 39B on the Kennedy House Middle.


NASA has transformed pad 39B for Artemis operations, tearing down a shuttle-era gantry and rotating service construction, erecting new lightning towers and beefing up a water deluge system designed to reduce heating and the acoustic shock of booster ignition.

A cellular launch platform used to hold shuttles to the pad has been transformed to be used with Artemis and now encompasses a 355-foot-tall service gantry that may roll to the pad with the rocket, offering a crew entry arm, energy, information and propellant feeds via a number of rotating umbilicals and connections.

For the moist costume rehearsal, the primary SLS can be hauled out to pad 39B for a full-scale observe countdown. The core stage alone can be loaded with 730,000 gallons of supercold liquid oxygen and hydrogen rocket gasoline.

Move charges, pressures and temperatures can be monitored all through because the countdown ticks all the best way all the way down to the ultimate 10 seconds, halting simply earlier than the principle engines would ignite on launch day.

“When you consider moist costume, it is actually getting the launch crew collectively, working via a whole tanking of the car, after which additionally a drain of the car and doing it in the identical surroundings, as we’ll have on launch day,” Bolger stated. “So it truly is a full costume rehearsal for the crew.”

As soon as the two-day costume rehearsal is full, the SLS can be hauled again to the Automobile Meeting Constructing for inspections and work to deal with issues which may have turned up through the tanking check. The rocket then can be hauled again out to pad 39B to organize it for launch.

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