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SLS - space launch system (3-я попытка)
 
https://www.nasa.gov/feature/nasa-commits-to-future-artemis-missions-with-more-sls-rocket-stages
Цитата
Oct. 16, 2019

NASA Commits to Future Artemis Missions With More SLS Rocket Stages

NASA has taken the next steps toward building Space Launch System (SLS) rocket core stages to support as many as 10 Artemis missions, including the mission that will carry the first woman and next man to the Moon by 2024.


NASA finished assembling the main structural components for the Space Launch System (SLS) rocket core stage on Sept. 19. Engineers at NASA’s Michoud Assembly Facility in New Orleans fully integrated the last piece of the 212-foot-tall core stage by adding the engine section to the rest of the previously assembled structure.
Credits: NASA/Steven Seipel
View Image Feature


The agency intends to work with Boeing, the current lead contractor for the core stages of the rockets that will fly on the first two Artemis missions, for the production of SLS rockets through the next decade. The core stage is the center part of the rocket that contains the two giant liquid fuel tanks. Towering 212 feet with a diameter of 27.6 feet, it will store cryogenic liquid hydrogen and liquid oxygen and all the systems that will feed the stage’s four RS-25 engines. It also houses the flight computers and much of the avionics needed to control the rocket’s flight.

NASA has provided initial funding and authorization to Boeing to begin work toward the production of the third core stage and to order targeted long-lead materials and cost-efficient bulk purchases to support future builds of core stages. This action allows Boeing to manufacture the third core stage in time for the 2024 mission, Artemis III, while NASA and Boeing work on negotiations to finalize the details of the full contract within the next year. The full contract is expected to support up to 10 core stages and up to eight Exploration Upper Stages (EUS).

“It is urgent that we meet the President’s goal to land astronauts on the Moon by 2024, and SLS is the only rocket that can help us meet that challenge,” said NASA Administrator Jim Bridenstine. “These initial steps allow NASA to start building the core stage that will launch the next astronauts to set foot on the lunar surface and build the powerful exploration upper stage that will expand the possibilities for Artemis missions by sending hardware and cargo along with humans or even heavier cargo needed to explore the Moon or Mars.”


An illustration of NASA’s Space Launch System (SLS) in the Block 1 configuration, which will carry an Orion spacecraft beyond the Moon, on the mobile launcher. SLS is the only rocket that can send the Orion spacecraft, astronauts and supplies to the Moon on a single mission.

Boeing’s current contract includes the SLS core stages for the Artemis I and Artemis II missions and the first EUS, as well as structural test articles and the core stage pathfinder. The new contract is expected to realize substantial savings compared to the production costs of core stages built during the design, development, test and evaluation phase by applying lessons learned during first-time builds and gaining efficiencies through bulk purchases.

“NASA is committed to establishing a sustainable presence at the Moon, and this action enables NASA to continue Space Launch System core stage production in support of that effort to help bring back new knowledge and prepare for sending astronauts to Mars,” said John Honeycutt, SLS Program Manager at Marshall. “SLS is the only rocket powerful enough to send Orion, astronauts and supplies to the Moon on a single mission, and no other rocket in production today can send as much cargo to deep space as the Space Launch System rocket.

For the first three Artemis missions, the SLS rocket uses an interim cryogenic propulsion stage to send the Orion spacecraft to the Moon. The SLS rocket is designed to meet a variety of mission needs by evolving to carry greater mass and volume with a more powerful EUS. The EUS is an important part of Artemis infrastructure needed to send astronauts and large cargo together, or larger cargo-only shipments, to the Moon, Mars and deep space. NASA aims to use the first EUS on the Artemis IV mission, and additional core stages and upper stages will support either crewed Artemis missions, science missions or cargo missions.

“The exploration upper stage will truly open up the universe by providing even more lift capability to deep space,” said Julie Bassler, the SLS Stages manager at Marshall. “The exploration upper stage will provide the power to send more than 45 metric tons, or 99 thousand pounds, to lunar orbit.”

The Space Launch System rocket, Orion spacecraft, Gateway and Human Landing System are part of NASA’s backbone for deep space exploration. Work is well underway on both the Artemis I and II rockets, with core stage assembly nearly complete at Michoud. Soon, the stage will be shipped to NASA’s Stennis Space Center near Bay St. Louis, Mississippi, where it will undergo Green Run testing, an integrated test of the entire new stage that culminates with the firing of all four RS-25 engines. Upon completion of the test, NASA’s Pegasus barge will take the core stage to NASA’s Kennedy Space Center in Florida where it will be integrated with other parts of the rocket and Orion for Artemis I. Boeing also has completed manufacturing most of the main core stage structures for Artemis II.

The Artemis program is the next step in human space exploration. It’s part of NASA’s broader Moon to Mars exploration approach, in which we will quickly and sustainably explore the Moon and use what we learn there to enable humanity’s next giant leap, sending astronauts to Mars.

For more information about SLS visit: https://www.nasa.gov/sls


Credits: NASA/MSFC

Last Updated: Oct. 16, 2019
Editor: Sarah Loff
 
Цитата
Chris B - NSF‏ @NASASpaceflight 12 мин. назад

The EUS turns SLS Block 1 into Block 1B (105mT capable vehicle). A downside is the rocket will be too tall for Mobile Launcher (ML-1) currently being tested at 39B. So NASA needs to build another (ML-2). Will take several years and lots of $'s to build.

https://www.nasaspaceflight.com/2018/04/nasas-dual-ml-plan-extra-sls-block-1-missions/
 
Какая же она большая



По длине как две первые ступени Сатурна вместе взятые

Для сравнения 1-ая ступень Сатурна-5 в том же месте пятьдесят лет назад

 
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Multi-arm Swing Test

NASAKennedy

15 окт. 2019 г.

Exploration Ground Systems continued to make sure the mobile launcher is ready for Artemis I with a multi-arm swing test on Friday, October 4, 2019 at Launch Pad 39B at Kennedy Space Center in Florida. The Umbilical Arm Simultaneous Retract Test included retraction of the connections that will provide fuel, coolant and communications to the Space Launch System rocket up until launch. The umbilicals tested included the Interim Cryogenic Propulsion Stage Umbilical (ICPSU), the Core Stage Forward Skirt Umbilical (CSFSU) and the Core Stage Intertank Umbilical (CSIU).
https://www.youtube.com/watch?v=Odl0TFh0Qy0 (1:13)
 
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LIVE: NASA SLS Core Stage Pathfinder lift in VAB

NASASpaceflight

Трансляция началась 118 минут назад
https://www.youtube.com/watch?v=hpCxGT01PXI (54:05)
 
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360 View of SLS Core Stage Pathfinder Lift

NASAKennedy

18 окт. 2019 г.

The Space Launch System's Core Stage Pathfinder is lifted from the Vehicle Assembly Building's transfer aisle and into High Bay 3 at NASA's Kennedy Space Center on Oct. 16, 2019. The Pathfinder, or practice hardware, is being used by Exploration Ground Systems and its contractor, Jacobs, to practice offloading, moving, and stacking maneuvers, using important ground support equipment to train employees and certify all the equipment works properly.
https://www.youtube.com/watch?v=lxGlxbSXrR0 (0:52)

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360 View of SLS Core Stage Pathfinder Lift: Camera 2

NASAKennedy

18 окт. 2019 г.
https://www.youtube.com/watch?v=zS77Mi1wVP4 (1:13)
 
Начали прикручивать второй двигатель RS-25
Что-то они медленно прикручивают.

Для шаттла процедура установки двигателя занимала всего 5 часов.
 
Цитата
Чебурашка написал:
Для шаттла процедура установки двигателя занимала всего 5 часов.
Первый раз небось тоже неделю прикручивали.  
Ангара - единственный в истории мировой космонавтики случай когда новая ракета по всем параметрам хуже старой. (с) Старый Ламер
Всё что связано с Ангарой подчинено единственной задаче - выкачать из бюджета и распилить как можно больше денег.
 
Цитата
Чебурашка написал:
Начали прикручивать второй двигатель RS-25
Что-то они медленно прикручивают.

Для шаттла процедура установки двигателя занимала всего 5 часов.
До Рождества что планируют?
Россия больше чем Плутон.
 
https://www.nasa.gov/exploration/systems/sls/multimedia/first-of-4-rs25-engines-attached-to-artemis-rocket-stage.html
Цитата
Oct. 22, 2019

NASA Attaches First of 4 RS-25 Engines to Artemis I Rocket Stage


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Engineers and technicians at NASA’s Michoud Assembly Facility in New Orleans have structurally mated the first of four RS-25 engines to the core stage for NASA’s Space Launch System (SLS) rocket that will help power the first Artemis mission to the Moon. Integration of the RS-25 engines to the recently completed core stage structure is a collaborative, multistep process for NASA and its partners Boeing, the core stage lead contractor, and Aerojet Rocketdyne, the RS-25 engines lead contractor. To complete the installation, the technicians will now integrate the propulsion and electrical systems.  The installation process will be repeated for each of the four RS-25 engines. The four RS-25 engines used for Artemis I were delivered to Michoud from Aerojet Rocketdyne’s facility at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, in June. The engines, located at the bottom of the core stage in a square pattern, are fueled by liquid hydrogen and liquid oxygen. During launch and flight, the four engines will fire nonstop for 8.5 minutes, emitting hot gases from each nozzle 13 times faster than the speed of sound. The completed core stage with all four engines attached will be the largest rocket stage NASA has built since the Saturn V stages for the Apollo Program.

NASA is working to land the first woman and next man on the Moon by 2024. SLS is part of NASA’s backbone for deep space exploration, along with Orion and the Gateway in orbit around the Moon. SLS is the only rocket that can send Orion, astronauts and supplies to the Moon on a single mission.

Image Credit: NASA/Jude Guidry

Last Updated: Oct. 22, 2019
Editor: Jennifer Harbaugh
 
Цитата
KBOB написал:
До Рождества что планируют?

10 декабря полностью укомплектованная ступень  должна покинуть завод в Мишуде и отправится на стенд в центре им. Маршалла.
Но уже чвуствуется, что отстают. Не успеют.
Изменено: Чебурашка - 23.10.2019 13:56:42
 
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NASA Marshall‏ @NASA_Marshall 43 мин. назад

The first RS-25 engine has been attached to the @NASA_SLS rocket that will send #Artemis I on its way to the Moon!

Learn more about how SLS is coming together >> http://go.nasa.gov/2qBCWyF




 
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NASA_SLS @NASA_SLS 5 ч. назад

#DidYouKnow each of the RS-25 engines for Artemis I has a special identification number? Engine 2056, the engine recently attached to the core stage, has flown on several shuttle missions including a servicing mission for NASA's Hubble Telescope. MORE >> http://go.nasa.gov/2MFg7m7


 
https://www.nasa.gov/feature/egs-practices-heavy-lift-of-core-stage-pathfinder-for-artemis-missions
Цитата
Oct. 23, 2019

EGS Practices Heavy Lift of Core Stage Pathfinder for Artemis Missions


In this view looking up inside the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers use a crane to lower the Space Launch System Core Stage pathfinder into High Bay 3 on Oct. 16, 2019.

By Linda Herridge
NASA's John F. Kennedy Space Center


What does it take to lift and stack NASA’s Space Launch System (SLS) rocket, the largest rocket ever built for flight? Weighing in at nearly 225,000 pounds, the core stage of the SLS is one of the largest and heaviest pieces of hardware that will be processed for Artemis missions. To accomplish the task of processing and preparing SLS for launch, Exploration Ground Systems and its contractor, Jacobs, are practicing lifting procedures of the core stage using a full-scale mock-up, called a pathfinder, in the Vehicle Assembly Building at the agency’s Kennedy Space Center in Florida.


Workers watch as two cranes are used to lift the Space Launch System Core Stage pathfinder high up in the transfer aisle of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida on Oct. 16, 2019.

The team is rehearsing moving and lifting maneuvers so that crews are trained on how to handle the core stage and certify all ground support equipment works properly before the actual core stage arrives for Artemis I.

“Practicing handling operations with full-scale pathfinders offers the respective teams essential hands-on experience for working with such immense structures before the one-of-a-kind hardware arrives,” said Mark Prill, core stage pathfinder lead at the agency’s Marshall Space Flight Center in Huntsville, Alabama.

The 212-foot-long pathfinder, similar in size, shape and weight to the massive core stage, arrived at Kennedy’s Launch Complex 39 turn basin wharf on Sept. 27, 2019, aboard NASA’s Pegasus barge. The pathfinder was the first delivery on the Pegasus barge in support of the agency’s Artemis missions. It was offloaded and transported to the VAB on Oct. 1.

Inside the VAB transfer aisle, a lifting fixture, called a spider, was attached to the top, or forward ring of the core stage pathfinder. A transportation and integration fixture, developed at Marshall, was used to move the spider to the core stage pathfinder to enable installation. With the spider secured in place, another crane was attached to the pathfinder’s aft end lifting brackets. Workers practiced using the cranes to lift the pathfinder horizontally up from its transporter. Then, crane operators performed a procedure called a breakover to slowly move the pathfinder into the vertical position and lift it up and over Level 16 into High Bay 3. A reverse sequence also was performed, with the core stage lifted up from the high bay, lowered down to the transfer aisle, returned to a horizontal position and secured in its transporter.

“Core stage pathfinder is the first opportunity for the entire Kennedy team to verify, validate and execute the engineering and planning associated with handling of the SLS core stage flight hardware, setting the stage for an experienced workforce and efficient processing for the historic Artemis missions,” said Jim Bolton, EGS Core Stage Element Operations manager.

The team will repeat the process several times to ensure Kennedy engineers and technicians are all trained and certified for future core stage operations.

“Experience is the best teacher,” Prill said. “Pathfinders allow crews to practice the lifting and transporting techniques that we can’t otherwise do with the actual flight hardware. This practice with the pathfinder reduces risk and builds confidence.”

Kennedy’s multi-user spaceport is preparing the facilities and ground support equipment for NASA’s Artemis missions to the Moon and on to Mars. The agency is planning to send the first woman and next man to the lunar surface.

The core stage pathfinder will remain at Kennedy through at least the end of October, when it is slated to be reloaded onto the Pegasus barge for the trek back to the Michoud Assembly Facility in New Orleans.

Last Updated: Oct. 23, 2019
Editor: Linda Herridge
 
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Chris G - NSF‏ @ChrisG_NSF 26 мин. назад

#Artemis1 Core Stage will hopefully ship to Stennis for Green Run testing by end of the year, says Bob Cabana. #NAC @NASA_SLS
 
Второ двигатель пристыковали

 
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Chris G - NSF‏ @ChrisG_NSF 3 мин. назад

2nd RS-25 main engine is soft mated.  Hard mate in a few days.  Engine 3 install 6 days after that.  4th engine 6 days thereafter.
#NAC #HEO #Artemis1
 
Тут нежданчик нарисовался

https://twitter.com/ChrisG_NSF/status/1189594431651008512

Цитата
NASA noting they are 1% over the allowable Ignition Overpresssure of the SRBs on SLS even with the Sound Suppresion System.  Issue is with Orion.  They expect a waiver for Artemis 1.  That overpressure is an issue.  It nearly crippled Columbia on STS-1
Will have to do more wind tunnel testing.  Might have to requal Orion hardware or resigned SLS outer mold line
They believe they can close that gap in the overpressure ahead of Artemis 2.  But the requal or redesign are options if they can't.

Превышение аж на целый процент.
В 60-ые годы бы просто забили. Наш блаженный Илон тоже бы забил.
А в насароги сча будут три года план разрабатывать, как это исправить  :D
 
Цитата
Чебурашка написал:
Превышение аж на целый процент.
А в численном выражении это сколько, интересно?
И мы пошли за так, на четвертак, за ради бога
В обход и напролом и просто пылью по лучу...
 
А превышение собственно чего? 1% оверпрешера это что и сколько?
Ангара - единственный в истории мировой космонавтики случай когда новая ракета по всем параметрам хуже старой. (с) Старый Ламер
Всё что связано с Ангарой подчинено единственной задаче - выкачать из бюджета и распилить как можно больше денег.
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