SLS - space launch system (3-я попытка)

Автор Salo, 16.02.2012 10:25:55

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SpaceR

Цитата
Цитатау VCR11000 и VCR21000 ускорители "односегментные" но тоже мощные :wink:  :P

как и где такую красоту заливать предполагается?
Разве? А не жидкостные?
Если я правильно понял картинки, то два типа ускорителей: пятисегментные тту и жидкостные адвенсед.
Во всяком случае я именно так толкую, написанное на 56 странице.
С этими жидкостными ускорителями вообще интересно.
В презентации по ним указаны топливо - refined petroleum (RP-1), длина 53 м и диаметр - ровно 5 м. Но ничего не сказано по их движках.
Снова всплывает призрак "тысячефунтовика"?  :roll:

Salo

Я вот подумал с чего это вся шумиха вокруг РД-175?
"Были когда-то и мы рысаками!!!"

ronatu

ЦитатаЯ вот подумал с чего это вся шумиха вокруг РД-175?
:wink:  :wink:
Когда жизнь экзаменует - первыми сдают нервы.

Потусторонний

Цитата
ЦитатаЯ вот подумал с чего это вся шумиха вокруг РД-175?
:wink:  :wink:
А какой сейчас есть выбор: RD-180, AJ-26 и Merlin-1. А если внимательно приглядеться, то один RD-180.  :roll:

Apollo13

Вот интересно. А с жидкостными ускорителями у них не будет проблемы ветровых нагрузок как у "Грозы"? А то нас тут пугали... :)

Чебурашка

Теоретически, есть еще F-1A... для освоения бюджета самое то.
По аналогии с восстановлением J-2X

Потусторонний

ЦитатаТеоретически, есть еще F-1A... для освоения бюджета самое то. По аналогии с восстановлением J-2X
Да, F-1 засвечены здесь: NASA Will Spend $200M On SLS Risk

Salo

http://www.spaceflightnow.com/news/n1202/27slsupperstage/
ЦитатаNASA's huge rocket needs engine with flight heritage[/size]
BY STEPHEN CLARK
SPACEFLIGHT NOW
Posted: February 27, 2012

NASA must find and purchase a cost-effective, proven cryogenic propulsion system for the first two flights of the agency's heavy-lift Space Launch System because the behemoth rocket's Apollo-era upper stage engine will not be ready in time, officials said.
 
The clock is ticking for the rocket to be ready in time for its first mission in late 2017. And NASA has a tight budget to pay for the upper stage, which is planned to send humans to the moon on a flight in 2021, according to agency managers.

The Space Launch System's initial missions are expected to dispatch Orion space capsules on flights around the moon and back to Earth. The 2021 launching will carry a crew.

Both flights will be powered into space by cryogenic core stage with three space shuttle main engines, known as RS-25D/E engines, and twin five-segment solid rocket boosters. But development of the J-2X upper stage engine, an upgraded version of a powerplant used on the Saturn 5 rocket, will not be finished in time.

Instead, NASA is planning to procure an interim upper stage to fly in 2017 and 2021. The space agency released a request for information, or RFI, solicitation in January seeking information on industry concepts for the upper stage, and NASA received three responses, according to Todd May, the Space Launch System program manager at the Marshall Space Flight Center in Huntsville, Ala.

"We got a few interesting inputs back from industry on the cryogenic upper stage," May said in an interview. "We're in the process of taking that data in and then formulating our acquisition strategy as we move forward."

NASA has not decided when it will select an interim Space Launch System upper stage, or how it will procure the rocket system. Based on the number of responses in the RFI and tight funding and schedule requirements, there may be limited interest from contractors.

One possibility is the RL10 engine, which is used on the upper stages of the United Launch Alliance Atlas 5 and Delta 4 rockets. The hydrogen-fueled engine, produced by Pratt & Whitney Rocketdyne, was also used on the Saturn 1 rocket in the 1960s.

The RL10 engine has extensive flight history, high reliability, restart capability, and there are plans to human-rate the version of the engine that powers the Centaur upper stage on the Atlas 5 rocket.

Three of four companies in the running to build a commercial crew spacecraft have picked the Atlas 5 rocket as their launch vehicle. Another, slightly more powerful version of the RL10 engine flies on the second stage of the Delta 4 launcher.

Pratt & Whitney Rocketdyne would not comment on which, if any, companies proposed the RL10 engine in the NASA solicitation. ULA spokesperson Jessica Rye said the Colorado-based firm "did not respond directly" to the RFI.

Boeing Co. also declined comment, and Lockheed Martin Corp. did not respond to questions.

May also would not identify which companies supplied data to NASA on an interim upper stage, citing sensitivity in the ongoing procurement process. He also declined to provide an estimate for the budget NASA is setting aside for the stage, only saying "it's not a lot" in an interview with Spaceflight Now.

NASA's proposed budget for the SLS program calls for nearly $1.4 billion per year through fiscal year 2017, but the numbers can be adjusted by Congress or in future White House budget requests.

"We're in a very constrained budget environment, so it's going to have to come in on mark and show up in time for that first flight," May said. "We're in an environment these days where all of those things are important. We're thinking, in order to come in on budget, you're not going to want to have to do a lot of development to get it there for the first flight. We're really looking for something that is an existing capability with really only minor [changes]."

NASA's requirements state the interim upper stage must be hydrogen-fueled, rated for human launches, and capable of at least three ignitions with power the change the 26.5-ton Orion spacecraft's velocity by more than 6,800 mph.

Agency managers also set mass and length requirements for the rocket stage. The upper stage system must be delivered to the Kennedy Space Center by the end of 2016 to support the first SLS mission.

May said the critical path to support the heavy-lift rocket's 2017 launch date is in the cryogenic core first stage, a 27.5-foot-diameter rocket, the same size of the space shuttle's external fuel tank. Outfitting the core's main propulsion system is the toughest task in the early phase of the program, he said.

"The critical path for the first launch flows through the core of the rocket, specifically through what we call the main propulsion system, which is all the tubes that run through the large tanks and the core engines," May said.

The interim upper stage is just one example of NASA's plans to employ existing technology on the Space Launch System. Shuttle main engines, other orbiter propulsion components, and shuttle-derived solid rocket boosters will also fly on the early flights of the gargantuan launch vehicle.

The first SLS configuration will stand more than 30 stories tall and should haul 70 metric tons, or about 154,000 pounds, to low Earth orbit.

"We're essentially flying out assets we have while we try to evolve to a more afforable and capable booster for the future," May said.

According to May, the Space Launch System program is taking control of 15 existing space shuttle main engines, and there are enough parts in inventory to build one more powerplant, opening up the option to launch four-engine first stages.

Managers expect advanced liquid- or solid-fueled boosters and the J-2X upper stage engine to enter service on the third flight of the Space Launch System. Later flights will require the construction of new first stage engines when the space shuttle's inventory is exhausted.

The SLS will ultimately evolve to haul up to 130 metric tons into low Earth orbit.[/size]
"Были когда-то и мы рысаками!!!"

instml

ATK five-segment rocket motor to enter qualification
ЦитатаEngineers in Utah started crafting another five-segment solid rocket motor this week for a ground-shaking test firing to qualify the 22-million horsepower booster for flight on NASA's Space Launch System in 2017.
 
The qualification campaign, led by rocket-builder ATK, will prove the solid-fueled motor is ready to help propel the Space Launch System from Earth on two test flights in 2017 and 2021. The 320-foot-tall rocket will launch unmanned first, and NASA says the second mission will carry astronauts on a trip around the moon inside an Orion capsule.

Each launch will be powered by two five-segment solid rocket boosters and hydrogen-fueled first stage engines left over from the space shuttle program.

Satisfied with the motor's design after three development motor firings in the Utah desert, ATK and NASA will ignite another rocket in a test stand in the spring of 2013.

"We're in the process of having QRRs, which are the readiness reviews for the first qualification motor firing," said Todd May, NASA's SLS project manager at the Marshall Space Flight Center in Huntsville, Ala. "That motor is scheduled to be tested in the spring of 2013. That test will baseline the performance and qualify the motor for flight."

The qualification readiness reviews are due to be finished in April, then technicians in June will begin casting each of the motor's segments with a recipe of solid propellant.

The motor's fuel is a form of powdered aluminum made combustible by an oxidizer called ammonium perchlorate. The mix also includes a polymer, epoxy and iron oxide.

Once technicians pour the propellant into the motor's 12-foot-diameter hollow casings, it cures to look and feel like a pencil eraser. The rocket holds 1.3 million pounds of propellant when fully loaded.

A second qualification motor test is scheduled for the summer of 2014, according to Trina Patterson, an ATK spokesperson.

Work on the first piece of case hardware for the first qualification firing, called QM-1, started Monday, Patterson said.

Three development motor firings from 2009 until 2011 demonstrated the rocket at ambient, hot and cold temperatures. Temperatures can affect the performance of a solid rocket motor.

Engineers were pleased the results of all three tests.
 
The Space Launch System motor is a stretched version of the space shuttle's four-segment solid rocket booster. The extra segment lengthens the motor to 154 feet, allowing it to generate up to 3.6 million pounds of thrust during a two-minute burn, more power than produced by the shuttle booster.

ATK started work on the five-segment motor for the Ares rocket program, which was canceled in 2010. The rocket would have been the first stage of the Ares 1 launcher.

When NASA revamped its space exploration plans, the space agency opted to recycle the five-segment motor design and rely on existing hardware to keep costs down on the Space Launch System, which is designed to help astronauts reach a variety of deep space destinations, including the moon, asteroids and Mars.

"That motor is very much shuttle-heritage," May said. "We did a lot of work in the Ares program. We've got a pretty good handle on how large segmented motors perform. We believe these QMs we've got scheduled will be plenty to characterize it. And remember the first launch in 2017 is a test launch, so you'll get some more data from that launch as well."

Combined with three liquid-fueled main engines, the earliest version of the Space Launch System will blast off with 8.4 million pounds of thrust, more than the Saturn 5 moon rocket or the space shuttle.

NASA says the SLS program will cost about $10 billion between 2011 and 2017.

For the third flight of the huge launcher in the early 2020s, NASA plans to develop a next-generation booster and a high-performance upper stage to nearly double the rocket's lift capacity to 130 metric tons, or 286,000 pounds, to low Earth orbit.

NASA expects to release a $200 million, 30-month award to multiple companies later this year to study advanced liquid or solid rocket booster concepts, according to May.

Industry has until April 9 to respond to the NASA solicitation for the advanced booster risk-reduction contract.

"That's a $200 million award going over 30 months. So we'll get the concepts, both liquid and solid, and what we're looking for is risk reduction, what are the biggest risks to each of those concepts, and what are the contractors proposing to reduce that risk," May said.

"We'll consider just about anything," May said. "We give them a set of requirements and an interface to the rocket and say give us your best ideas."
http://www.spaceflightnow.com/news/n1202/28atkqm1/
Go MSL!

Александр Ч.

ЦитатаNASA J2X engine no.10001 is back in the test stand at the Stennis Space Center. Testing of this engine for SLS will resume in the coming weeks.
около 7 часов назад
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Александр Ч.

Продолжая новость про J-2:
ЦитатаJ-2X Engine 10001 at Stennis Space Center

J-2X engine 10001 is returning back to the A-2 Test Stand at NASA's Stennis Space Center for its second round of tests. The developmental engine underwent an initial series of tests last year. Both the engine and test stand have been modified to begin simulated altitude testing in the coming months.

 The J-2X engine is designed and built by Pratt & Whitney Rocketdyne for NASA's Marshall Space Flight Center. It is the first human-rated liquid oxygen and liquid hydrogen rocket engine to be developed in 40 years. The J-2X will provide upper-stage power for NASA's Space Launch System, a new heavy-lift vehicle capable of missions beyond low-Earth orbit.
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instml

ВИДЕО

NASA Sub-Scale Solid-Rocket Motor Tests Material for Space Launch System

Цитата

A sub-scale solid rocket motor designed to mimic NASA's Space Launch System, or SLS, booster design successfully was tested today by engineers at NASA's Marshall Space Flight Center in Huntsville, Ala. The 20-second firing tested new insulation materials on the 24-inch-diameter, 109-inch-long motor. The motor is a scaled down, low-cost replica of the solid rocket motors that will boost SLS off the launch pad.

Marshall is leading the design and development of the SLS on behalf of the agency. The new heavy-lift launch vehicle will expand human presence beyond low-Earth orbit and enable new missions of exploration across the solar system.

The test will help engineers develop and evaluate analytical models and skills to assess future full-scale SLS solid rocket motor tests. The next full-scale test, Qualification Motor-1 (QM-1), is targeted for spring 2013. Two five-segment solid rocket motors, the world's largest at 154-foot-long and 12-foot diameter, will be used in the first two 70-metric-ton capability flights of SLS.

Watch the test fire video below: http://www.nasa.gov/multimedia/videogallery/index.html?media_id=135789151

Previous ground tests of the motors included carbon insulation to protect the rocket's nozzle from the harsh environment and 5000-degree temperatures to which it is exposed. QM-1 will include a new insulation material, provided by a new vendor, to line the motor's nozzle.

"Test firing small motors at Marshall provides a quick, affordable and effective way to evaluate the new nozzle liner's performance," said Scott Ringel, an engineer at Marshall and the design lead for this test. "We have sophisticated analytic and computer modeling tools that tell us whether the new nozzle insulation will perform well, but nothing gives us better confidence than a hot-fire test."

The test also includes several secondary objectives. The team introduced an intentional defect in the propellant with a tool designed to create a specific flaw size. By measuring the temperature inside the motor at the flaw location, the team hopes to gain a better understanding for the propellant's margin for error. Test data also will help the team better understand acoustics and vibrations resulting from the rocket motor's plume.

In addition, NASA's Engineering and Safety Center will use test data to measure a solid rocket motor's plume and how it reacts to certain materials.

Engineers from Marshall's Engineering Directorate designed the test motor with support from ATK Aerospace Systems of Huntsville, Ala. ATK of Brigham City, Utah, the prime contractor for the SLS booster, is responsible for designing and testing the SLS five-segment solid rocket motor.
http://www.nasa.gov/exploration/systems/sls/H12-085.html
Go MSL!


instml

НАСА выделит на технологический "апгрейд" новой тяжелой ракеты $48 млн
ЦитатаМОСКВА, 21 мар - РИА Новости. НАСА объявило конкурс среди коммерческих компаний и научных институтов по разработке материалов и технологий для новой тяжелой ракеты-носителя SLS, общая сумма финансирования в 2013-2015 годах составит 48 миллионов долларов, говорится в сообщении американского космического агентства.

Агентство выбрало SLS в качестве новой ракеты-носителя, которая будет выводить в космос будущие американские космические корабли для исследования Солнечной системы, в сентябре 2011 года. В рамках нового конкурса компании и институты космической отрасли смогут предложить свои решения в области систем тяги, конструкции, материалов, производства, авионики и программного обеспечения, которые впоследствии позволят увеличить грузоподъемность ракеты с 70-100 тонн до 130 тонн, как это предполагают планы НАСА.

"Мы ждем от отрасли и научного сообщества предложений по продвинутым технологическим решениям, которые позволят обеспечить работоспособность модернизированной SLS. Сейчас интересное время для НАСА, эти решения станут совершенно новыми прорывами в космических технологиях, которые позволят астронавтам отправиться дальше в космос, чем когда-либо", - сказала председатель отборочной комиссии Минди Нидермайер (Mindy Niedermeyer), чьи слова приводит пресс-служба НАСА.

Заявки на участие принимаются до 15 мая. Общий бюджет конкурса составляет 48 миллионов долларов на три бюджетных года, при этом в базовом 2013 году планируется выделить 22 миллиона, а затем еще 14,5 миллиона и 11,5 миллиона долларов. В частности, сумма грантов для научных институтов составит примерно 1,5 миллиона долларов в год, а максимальная сумма отдельного научного гранта, как ожидается, составит не более 250 тысяч.

Новая космическая система Space Launch System (SLS) станет самой мощной американской ракетой со времен "Сатурнов", которые в 1960-1970-е годы выводили в космос "Аполлоны" лунных миссий. Первая ступень носителя будет оснащена водородно-кислородными двигателями RS-25D/E (новая версия двигателей шаттлов RS-25), а вторая - разработанными для проекта "Созвездие" (Constellation) двигателями J-2X на том же топливе.

На ранних этапах будут использоваться твердотопливные ускорители, применявшиеся для запуска шаттлов и другие уже существующие космические разработки. Первый полет ракеты, как ожидается, состоится в 2017 году, а первый полет с пилотируемым кораблем - в 2021 году.

Ракета SLS будет доставлять в космос будущие американские пилотируемые корабли "Орион", главной задачей которых станет исследование пространства за пределами околоземной орбиты. В частности, США планируют пилотируемую миссию по исследованию астероида (2025 год) и полет на Марс в 2030-е годы.

Корабль "Орион", напоминающий по своей конструкции "Аполлоны", был частью программы "Созвездие", начатой во времена президента Джорджа Буша-младшего с целью вновь доставить американских астронавтов на Луну, а затем отправить миссию на Марс. Нынешний президент США Барак Обама в 2010 году свернул эту программу.
http://ria.ru/science/20120321/601711930.html
Go MSL!

Salo

"Были когда-то и мы рысаками!!!"

Lamort

Цитатаhttp://www.nasa.gov/pdf/630149main_5-Hill_SLS%20MPCV%20GSDO_508.pdf

http://www.nasa.gov/pdf/632674main_NASA_FY13_Budget_Exploration-508.pdf
Не понимаю зачем они собрались громоздить третью ступень сверху, наверно чтобы денег побольше потратить.
La mort toujours avec toi.


Salo

ЦитатаНе понимаю зачем они собрались громоздить третью ступень сверху, наверно чтобы денег побольше потратить.
Предлагаете вторую к Луне прямым выведением отправить? :wink:
"Были когда-то и мы рысаками!!!"

Дмитрий В.

Цитата
ЦитатаНе понимаю зачем они собрались громоздить третью ступень сверху, наверно чтобы денег побольше потратить.
Предлагаете вторую к Луне прямым выведением отправить? :wink:

Я так понимаю, предлагается ее повесить сбоку :D
Lingua latina non penis canina
StarShip - аналоговнет!

Lamort

Цитата
ЦитатаНе понимаю зачем они собрались громоздить третью ступень сверху, наверно чтобы денег побольше потратить.
Предлагаете вторую к Луне прямым выведением отправить? :wink:
Просто взять шаттловскую схему и третью ступень повесить сбоку, - с минимальными модификациями Шаттла.
La mort toujours avec toi.