SLS - space launch system (3-я попытка)

[Mark]

Большой пишет:
Марк, а картинка с размерами СЛС есть?

К солжалению, наверно художник сделал картинки без размров СЛС. Ссылка от НАСА:
Space Launch System Concept Images.
 
http://www.nasa.gov/exploration/systems/sls/multimedia/gallery/SLS_Concepts.html#lowerAccordion-set1-slide4

[G.K.]

TBD March 2018 - Orion: Exploration Mission 1 (Distant Retrograde Orbit (DRO) Tactical DRM) - SLS Block I- Canaveral SLC-39B 

Кто бы мне сказал, как они на "ретроград орбит" ( то есть на обратную?) с Канаверала лететь хотят? И что такое Tactical DRM?

[frigate]

An object with an inclination between 90 degrees and 180 degrees is in a retrograde orbit.  :idea:

Distant retrograde orbits (DROs) are stable periodic orbit solutions of the equations of motion in the circular restricted three body problem.
http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/38896/1/06-0137.pdf
Tactical DRM (Design Reference Mission)

[Mark]

Большой пишет:
Марк, а картинка с размерами СЛС есть?

Пишут что высота равна 102 с лишним метра. А эскизный проект SLS в виде большой пачки, имеет около 200 документов и примерно 15 терабайт электронной информации.
 
http://www.astronews.ru/cgi-bin/mng.cgi?page=news&news=4401

[Mark]

Huge Liquid Hydrogen Tank for SLS Rocket Under Construction, 05.08.2013

[Mark]

В среду, 31.7.2013, был представлен обзор предварительного проектирования SLS (PDR) центра космических полетов Маршалл, Хантсвилл, штат Алабама. Видео и картинка.

http://s14.directupload.net/images/130806/8ger8w4a.jpg
 

[Mark]

Dynetics reporting outstanding progress on F-1B rocket engine - Pyrios и 3D технологиа, 13.08.13

Back in April, we covered the efforts of Huntsville-based Dynetics to design a new, monstrous, liquid-fueled engine for NASA's Advanced Booster Competition. The engine is a new high-thrust, kerosene/liquid oxygen design based on the F-1 engine that powered the Apollo-Saturn V launch vehicle in the 1960s, and getting up to speed on building a new kerosene/liquid oxygen engine has relied on some creative and exciting rocket archaeology by NASA.
The Advanced Booster Competition's goal is to design the two strap-on boosters that will attach to NASA's upcoming Space Launch System heavy lift rocket. There are several competitors in the contest; the popular front-runner is Space Shuttle Solid Rocket Booster manufacturer ATK, with its solid fueled Dark Knight booster. However, Dynetics (with their Pratt Whitney Rocketdyne partners) hopes to win the competition with its liquid-fueled booster, currently codenamed Pyrios after one of the fiery horses that drew Apollo's chariot across the sky


The prototype components were constructed not with welding and casting, but rather with selective laser melting—a 3D printing technique that uses hot lasers to fuse metal powder into complex shapes. Dynetics and Pratt Whitney Rocketdyne hope to lean heavily on advanced manufacturing techniques like this in order to massively reduce the part count—and hence cost—of the F-1B engine compared to its F-1 predecessor. Current estimates call for a reduction in the combustion chamber from more than 5,000 parts in the F-1 to fewer than 100 parts in the F-1B.

Additionally, the Dynetics crew has moved forward with fabrication of the large cryogenic tanks necessary to hold the Pyrios rocket's liquid oxygen. The tankage is being manufactured in Huntsville using an enormous friction stir welding rig; the focus is on producing a lightweight but strong structure that functions to specification yet is extremely inexpensive to manufacture.
Though the hot-fire gas generator tests we attended earlier this year have concluded, there's more rocket firing on the horizon. The NASA SLS propulsion team at Marshall Space Flight Center hopes to test an original F-1 powerpack at F-1B levels in the near term, which in turn will clear the way for Dynetics and Pratt Whitney Rocketdyne to manufacture and test an F-1B powerpack at similar levels by 2015. Ars plans to be on-hand for as much of this testing as possible, so stay tuned

http://arstechnica.com/science/2013/08/dynetics-reporting-outstanding-progress-on-f-1b-rocket-engine/

[Mark]

John Strickland: По оценкам каждый запуск SLS/Orion может стоить от 5 млрд и 14 млрд $ в зависимости от скорости запуска. Стоимость пуска Сатурн-5/Аполлон была более 2 Миллиард $

http://blog.al.com/breaking/2013/07/nasa_defends_space_launch_syst.html

[Salo]

http://www.parabolicarc.com/2013/08/18/dynetics-update/

Dynetics Reports Excellent Progress on Advanced SLS Boosters
Posted by Doug Messier
 
on August 18, 2013, at 7:30 am in News
                                                        
Dynetics' friction stir weld team (left to right: John Meyer, Greg Neal, Taylor Murphy, Todd Renz, Andre' Paseur) in front of the first Dynetics SLS advanced booster demonstration cryo tank barrel, successfully welded using the Marshall Space Flight Center Vertical Weld Tool. (Credit: Dynetics)

 HUNTSVILLE, Ala., Aug. 13, 2013 (Dynetics PR) – Dynetics officials today reported successful progress on the company's hardware build and test tasks in support of advanced development for NASA's Space Launch System (SLS). This announcement comes at the end of the third quarter of the contract NASA awarded last fall to a team made up of Dynetics and Aerojet Rocketdyne to reduce risks for Advanced Boosters that could help meet SLS's future capability needs.
The team plans to perform a wide-ranging set of full-scale, system-level demonstrations on key Advanced Booster systems through early 2015.
"Progress during the first 10 months of the contract has been outstanding," said Kim Doering, Dynetics program manager.
 

Dynetics completing the trim of its first SLS advanced booster demonstration cryo tank barrel using the Marshall Space Flight Center Vertical Trim Tool. (Credit: Dynetics)

 Dynetics, the prime contractor, is designing and fabricating a full-scale cryogenic tank that it will test to verify the structural design of the affordable booster concept," Doering said. "We've successfully manufactured our first two full-scale, 18-foot diameter cryotank barrels, including friction stir welding them on Marshall Space Flight Center tools. Taking the flight-weight tank barrels all the way from design through successful manufacturing in less than 10 months demonstrates that Dynetics' affordable booster structures approach is credible."
Aerojet Rocketdyne is applying state-of-the-art manufacturing techniques to the Apollo-era F-1 rocket engine to arrive at a proven, high-powered engine that is much less expensive than competitive options, both to develop and to build. The team calls this engine the "F-1B" to reflect both its heritage and its unique benefits.
Andy Crocker, Dynetics deputy program manager, said, "We've got great partnerships, both with Aerojet Rocketdyne and with NASA." Those two partners worked together to complete hot-fire testing of the F-1 gas generator at F-1B conditions. We completed all 10 tests and 235 seconds of hot-fire time even faster than expected, and all test objectives and success criteria were met."
Aerojet Rocketdyne engineers completed a design review for an F-1B gas generator injector and started manufacturing the part using selective laser melting, a state-of-the-art fabrication method that offers potentially significant cost reductions. They also conducted design reviews for the turbine manifold and first stage turbine blade and made successful initial castings of key parts. Finally, they completed preliminary design reviews of the powerpack assembly and main combustion chamber.
"We're proud to be playing a role in our nation's human space exploration program," said Steve Cook, Dynetics director of Space Technologies. "Completing these risk reduction activities will give NASA the confidence it needs to proceed with a near-term Advanced Booster competition. We look forward to that opportunity."
Dynetics released this news during the 2013 Space & Missile Defense Symposium being held here at the Von Braun Center Aug. 12-15. For more information, visit http://smdsymposium.org/.

About Dynetics
Dynetics delivers the "Power of Solutions" to government and commercial customers in the areas of intelligence, missiles, aviation, cyber and space. Based in Huntsville, Ala., with offices throughout the United States, Dynetics is a mid-tier company that provides complete lifecycle analysis, engineering and hardware solutions to support customer missions. For more information, visit www.dynetics.com.
Dynetics and the Dynetics logo are registered trademarks of Dynetics Inc. Other brands and product names are trademarks of their respective owners.

[pkl]

Mark пишет:
 John Strickland: По оценкам каждый запуск SLS/Orion может стоить от 5 млрд и 14 млрд $ в зависимости от скорости запуска. Стоимость пуска Сатурн-5/Аполлон была более 2 Миллиард $

 http://blog.al.com/breaking/2013/07/nasa_defends_space_launch_syst.html

Т.е. получается, шаттл - дорогое убожество в любом виде.  Лучше бы они её с нуля делали.

[ZOOR]

pkl пишет:

Mark пишет:
 John Strickland: По оценкам каждый запуск SLS/Orion может стоить от 5 млрд и 14 млрд $ в зависимости от скорости запуска. Стоимость пуска Сатурн-5/Аполлон была более 2 Миллиард $

 http://blog.al.com/breaking/2013/07/nasa_defends_space_launch_syst.html

Т.е. получается, шаттл - дорогое убожество в любом виде.    Лучше бы они её с нуля делали.

В этой цитате непонятно, приведены ли они к одинаковой покупательной способности $. В 60-е бакс был намного дороже.

[pkl]

Гм, написав вчера и уже ложась спать, тоже об этом подумал.

[Valerij]

Dual SLS launch campaign required for NASA's Lunar return
August 21, 2013 by Chris Bergin


   
A return to the surface of the Moon would require two Space Launch System (SLS) rockets launching over half a year apart, with a four person crew being transported to the Lunar surface on a multi-billion dollar Lander for a seven day sortie mission. The overview, provided in the latest Concept Of Operations (CONOPS) document, all-but rules out the option based on cost estimates alone.


Apollo On Unaffordable Steroids:

Often cited as the preferred opening exploration option by numerous lawmakers, a return to the surface of the Moon would realign NASA with the plan outlined in the Vision for Space Exploration (VSE), before the aborted Constellation Program (CxP) failed to deliver on its goals.

CxP utilized a 1.5 launch architecture with its Ares I Crew Launch Vehicle (CLV) tasked with launching astronauts on the Orion spacecraft, in tandem with the Ares V Cargo Launch Vehicle (CaLV) that would provide the heavy lift for the Altair Lunar Lander.

Classed as "Apollo on Steroids", Ares I and Orion would have first provided crew rotations of NASA astronauts on the International Space Station (ISS), prior to an upgraded Orion being re-tasked to conduct into Beyond Earth Orbit (BEO) for sorties to the Lunar Surface by the year 2020, all of which would provide the experience for venturing out towards Mars.


   
With technical issues and budget shortfalls, this manifest soon started to slip, leading to the Augustine Commission review of NASA's Human Space Flight objectives, a meeting that provided one of the final nails in the Constellation Program's coffin.

With the Agency realigned to the FY2011 plan fr om President Obama's administration, Orion – NASA's only planned replacement for then-retiring Space Shuttle – was cancelled as part of the CxP cull.

Amid wide-scale discontent with the new plan, Orion was brought back from the dead, but only in the role of a lifeboat on the ISS.


   
It took the 2012 Authorization Act to fully realign the FY2011 proposal into a plan that involved Orion being used as a BEO vehicle, launched by the Space Launch System (SLS).

With NASA managers conducting additional reviews and exploration planning it was decided the opening missions would concentrate on the Moon, albeit without landing on the lunar surface.

Known as Exploration Mission -1 (EM-1) and Exploration Mission -2 (EM-2), the Block 1 SLS was to loft Orion on an uncrewed flight around the Moon, prior to a crewed version a full four years later.

The large gap related to political instructions to ready SLS and Orion for a 2017 role in backing up ISS crew rotations, in the event Commercial Crew providers failed to come on line in time.


   
NASA managers then changed EM-2 into a crewed flight to a captured asteroid, with a Change Request currently being evaluated to refine EM-1 to an uncrewed mission that will send Orion thousands of miles past the Moon – a move that is designed to aid operational understanding ahead of EM-2.

Since NASA announced the asteroid mission plan for EM-2, a number of lawmakers have been less than enthusiastic, claiming they would prefer the Agency concentrated on returning to the surface of the Moon instead.

Almost immediately, NASA Administrator Charlie Bolden countered such proposals via strongly worded comments at May's Explore Mars conference.

"We need to try and get all of us on to the same sheet of music in terms of the roadmap," noted the NASA head. "(If we) have someone in the next administration who could take us back to a human lunar mission, it's all over, we will go back to square one."


   
General Bolden's comments focused mainly on the costs associated with a Lunar return, not least when NASA's funding is completely insufficient for the additional hardware – such as the Lunar Lander – required for returning to the surface.

However, internal documentation had already placed the potential for NASA missions to the Moon's surface within the ESD Concept Of Operations (Con Ops) presentations (L2) – listing it alongside the main NEA (Earth Earth Asteroid) missions under the Architectural Timeframe Design Reference Missions (DRMs).

Moreover, the latest Con Ops presentation – an expansive document covering EM-1 through to Mars – provided the most extensive overview of the Lunar Sortie DRM, as much as it adds to the rationale behind General Bolden's cost concerns.


   
Unlike the days of Apollo, wh ere one Saturn V was capable of launching the Apollo spacecraft, the crew, the lander and ascent module with associated hardware, a return to the Moon with SLS and Orion would require the use of two SLS 105mT Block 1A/B launch vehicles.

"The Lunar Surface Sortie DRM lands four crew members on the surface of the Moon in the equatorial or polar regions and returns them to Earth," noted the outline in the latest Con Ops presentation, available to download in L2.

"The equatorial and polar regions are chosen to reduce the lunar delta-v requirements compared to mid-latitude regions. For surface stays of approximately seven days, this DRM is accomplished with a series of two 105-t SLS launches."

Currently, SLS can only launch once every six months, with the outline taking this into account by staging the Lunar Sortie mission into two parts, in addition to changing the Apollo approach by opting for a Lunar Orbit Rendezvous (LOR) of the hardware.


   
"SLS-1 puts the Lunar Lander with a Block 1 Cryogenic Propulsion Stage (CPS-1) into LEO while SLS-2 puts the Orion with another Block 1 CPS (CPS-2) into LEO," added the overview.

"Instead of docking the Orion with the Lander in LEO, this DRM uses a dual Lunar Orbit Rendezvous (LOR) mission design that performs Rendezvous, Proximity Operations, Docking, and Undocking (RPODU) sequences in LLO (Low Lunar Orbit). CPS1- transports the Lander to LLO and CPS-2 transports the crewed Orion.

"Due to the spacing between SLS launches, the Lander is required to loiter for a long period in LLO. The Orion, as the active vehicle, docks to the waiting Lunar Lander. The Orion remains primary for all elements until the crew members transfer into the Lunar Lander."

Following rendezvous and docking of the Orion and Lander in LLO, the crew would then transfer into the Lunar Lander and descends to the Moon's surface.

The Lunar Lander would be designed to provide habitation for seven days duration on the surface, while Block 2 EVA Deep Space Suits would be required for surface EVA operations.


   
Although the use of two SLS vehicles would be very costly, the superior upmass ability would allow for an ambitious lander, as depicted in the Con Ops presentation.

"The Lunar Lander provides transportation for crew members to and from the Lunar surface and supports crew members for short duration lunar surface stays. The Sortie Lunar Lander two-module configuration consists of the Descent Module (DM) and the Ascent Module (AM). The AM includes Suit Ports and a side hatch opening to the Lunar Lander deck. All crew equipment, supplies, and consumables are stowed in the AM.

"The Lunar Lander also has a three-module vehicle configuration for extended stays consisting of the DM, the AM, and a Suit Lock/Suit Port (SL) module. The Suit Ports minimize the time required for the crew members to don suits and begin surface EVA, and minimize atmosphere losses."

Notably, even a version of Constellation's Altair Lander is classed as one of the major reasons for General Bolden's dismissal of such missions being viable, with the cost of a lander in the several billion dollar range.


   
Per the overview provided by the Con Ops document, the final leg of the mission would closely match that seen during the Apollo days.

"Once surface operations are complete, the Lunar Lander's AM returns the crew members to LLO and docks with the Orion. The Orion has enough delta-v capability to support plane changes required to meet up with the Lander AM for any time ascent. Some loiter time in LLO may be required in this situation to wait for a window to return to Earth. The AM is disposed of before the Orion departs for Earth."

Although – as mentioned – such a mission is not going to occur unless lawmakers provide NASA with the additional funding, a large amount of work has clearly taken place from within the Exploration Systems community, with the presentation adding expansive timelines for the entire mission.

Click here for more Lunar Mission Articles: http://www.nasaspaceflight.com/tag/moon/

However, until such lawmakers support a Lunar return with additional funding, General Bolden's concerns are likely to remain in pole position for NASA's forward path, adding "I believe (that would mean we) would have missed the second greatest opportunity for humanity to go on to deep space and do what humans have wanted to do for hundreds of years (if we are tasked with returning to the Lunar surface)."

(Images: Via L2 content from L2′s SLS specific L2 section, which includes, presentations, videos, graphics and internal – interactive with actual SLS engineers – updates on the SLS and HLV, available on no other site. Other images via NASA)

http://www.nasaspaceflight.com/2013/08/dual-sls-required-nasas-lunar-landing-option/

[Mark]

SLS Monthly Highlights, June- July 2013.
 
http://www.nasa.gov/sites/default/files/files/SLS_Highlights_July_2013.pdf

http://www.nasa.gov/sites/default/files/files/SLS_Highlights_June_2013_rev2.pdf

[Mark]

ZOOR пишет:

pkl пишет:

Mark пишет:
John Strickland: По оценкам каждый запуск SLS/Orion может стоить от 5 млрд и 14 млрд $ в зависимости от скорости запуска. Стоимость пуска Сатурн-5/Аполлон была более 2 Миллиард $

http://blog.al.com/breaking/2013/07/nasa_defends_space_launch_syst.html

Т.е. получается, шаттл - дорогое убожество в любом виде.    Лучше бы они её с нуля делали.

В этой цитате непонятно, приведены ли они к одинаковой покупательной способности $. В 60-е бакс был намного дороже.

Стоимость последних Аполлон полетов в 1972 годах ест на 420 миллион $, ето эквивалентную покупательной способности к 2010 году около 1,800 Миллиард $. Данные от Augustine Commission.

Die Gesamtkosten betragen somit 126,8 Milliarden Dollar in realen Ausgaben, entsprechend 237,7 Milliarden Dollar im Wert von 2000. Dies entspricht 301,8 Milliarden Dollar des Wertes von 2010. Jeder der 134 Space Shuttle Flüge kostet die NASA somit rund 2,25 Milliarden heutige Dollars, wenn die Gesamtkosten durch die Flüge geteilt werden. Ein Apollo Flug der J-Mission (die letzten drei Apollomissionen) kostete 1972 420 Millionen Dollar, das entspricht rund 1.800 Millionen Dollar der Kaufkraft von 2010

[Mark]

Специалисты NASA продолжают усиленно работать над разработкой системы трубопровода для двигателя ракета-носителя SLS, 27 Авг 2013.

В Stennis Space Center, расположенном неподалёку от бухты Сент –Луис (штат Миссисипи) специалисты NASA усиленно работают над модернизацией водородно-кислородного двигателя РТС 25 для первой ступени американской сверхтяжёлой ракеты SLS. Тестирование основных стадий двигателя для нового ракета-носителя Space Launch System, предположительно начнётся уже следующей весной. SLS разрабатывается специально для выведения грузов и пилотируемых экспедиций за пределы околоземной орбиты.По словам Robert Ek, системного инженера РТС 25, модернизация двигателя – весьма сложная задача, ибо из-за масштабных размеров и много килограммового веса его проверка может стать реальной проблемой для инженеров.
В настоящее время разработчики параллельно проводят тестирование кардана J-2X двигателя, которым будет оснащена вторая ступень двигателя ракеты. Испытания закончатся уже в конце следующего месяца. Также не прекращается работа по разработке системы трубопроводов, проектирование которого стало для инженеров NASA весьма сложной задачей, поскольку потребовалось огромное количество информации о двигателе RS-25 и его технических характеристиках.
Mike Kynard, координирующий разработку двигателей для SLS, отмечает, что безупречной работы жидкостных ракетных двигателей РТС-25 на всех 135 полётах космических кораблей Space Shuttle недостаточно для SLS, ибо новый ракета-носитель имеет новые экологические параметры и, следовательно, различные испытательные соображения. Инженер добавил, что в независимости от того, затронут изменения непосредственно конструкцию двигателя или условия в окружающей среде, SLS пройдёт через полный комплекс испытательных тестов.

Работая над системой трубопровода, инженеры принимали во внимание новые коэффициенты работы двигателя, чтобы определить такие вещи как расход криогенного топлива, скорость его поступления и показатели давления, отвечающие за его бесперебойную подачу. С точки зрения простой геометрии они должны были удостовериться, что трубные соединения расположены должным образом, и установить, как и где монтировать опоры для поддержания и фиксации трубопроводов двигателя.
Как только система трубопровода двигателя будет полностью завершена, инженеры NASA приступят к серии тестов, предназначенных для проверки системы на отсутствие протечек и устойчивости к влиянию низких температур

http://kosmo-apparaty.ru/novosti/270813-sls.htm

[Mark]

Exploration Systems Division Quarterly Report #3: 2013, 26.08.2013
Очень интересное видео  :!:

[Mark]

ATK/NASA investigating void issue in SLS test motor segment, 05.09.2013.

Experts from ATK and NASA are investigating the cause of voids in the aft segment of the next test motor for the Space Launch System (SLS). Known as Qualification Motor -1 (QM-1), the original aft segment was scrapped following the discovery of voids via examinations, only for its replacement to mirror the problem – possibly caused by processing and design changes in the motor's

http://www.nasaspaceflight.com/2013/09/atknasa-void-issue-sls-test-motor-segment/

Из проблемы, описанные в стати, первый QM- 1 тест будет теперь в 2014 году  :!:  

[Mark]

Final J-2X Test-Fire Conducted at A-1 Test Stand, NASA / Aerojet Rocketdyne Ready to Test RS-25, 05.09.2013
 
 NASA along with Aerojet Rocketdyne conducted a test firing of a J-2X rocket engine at NASA's Stennis Space Center. The hot-fire was conducted in order to test the engine for possible use in NASA's new heavy-lift booster, the Space Launch System, or SLS. The test-firing of J-2X number 10002 was conducted at Stennis' A-1 Test Stand and lasted for the full, planned 330 seconds. By all accounts it was a complete success.

Jim Paulson, Aerojet Rocketdyne Deputy Program Manager for Advanced Space and Launch Systems, stated that the test was a "major milestone as this test was the end of gimballing certification."

Paulson further stated that even though there was further J-2X testing to be performed, this test paved the way for NASA / Aerojet Rocketdyne to re-focus their efforts on development of a more affordable, non-reusable version of the RS-25 for use on SLS

http://www.americaspace.com/?p=42137

One Final Test for J-2X Engine No. 10002, 05.09.2013
 

[Mark]

NASA managers evaluate yearlong deep space asteroid mission, 09.09.2013

On track for their respective debuts, NASA's Space Launch System (SLS) and Orion feature front and center in one of NASA's latest evaluations for a mission to a deep space near-Earth asteroid (NEA). The conceptual mission, set after SLS' opening salvo of flights, would send a crew of four on a yearlong voyage to study one of Earth's nearest celestial neighbors


While NASA's latest Con Ops document states that the exact nature of the exploration activities is "still being formulated," the document indicates that likely possibilities for activities include "surveying the NEA for collection of scientific data," and "robotic placement of science packages."Upon conclusion of the fourteen-day exploration period, the crew would dispose of the REM. Orion, still docked to the DSH, would then perform a series of burns to separate from the REM and the asteroid, beginning a 153 day return to Earth.
Two days before reentry and splashdown on Earth, the crew would transfer to Orion's crew module (CM) and Orion would separate from the DSH. Finally, 490 days after the mission's first SLS launch, Orion would jettison its SM, streak across Earth's atmosphere, deploy its parachutes and splash down in the waters of its home world.

http://www.nasaspaceflight.com/2013/09/nasa-evaluate-yearlong-asteroid-mission/