Antares (Taurus II)

[Apollo13]

-AVK- пишет:

Apollo13 пишет:
Орбитал не собирается увеличивать бюджет на R&D в связи с новым двигателем.

Как это? Поменял двигатель а НЭО не проводить? Статика, динамика, ОСИ?

Видимо в рамках существующего бюджета. Который явно невелик.

[Apollo13]

Дмитрий В. пишет:

Apollo13 пишет:

-AVK- пишет:

Apollo13 пишет:
Мы тут последние 2 страницы как раз пытались понять кто и как будет приспосабливать УВТ к РД-193.

Непонятно, зачем "приспосабливать" то, что является родным для этого двигателя, ведь 193-й всего лишь модернизация 191-го.

В сообщении говорилось именно об РД-193. Вот мы и пытаемся понять "зачем"? "Будет на 2 чатла дешевле"?

Вам не приходило в голову, что это банальная оговорка? Или ляп не слишком грамотного менеджера? И вот из этой мухи раздувается слон. Помнится, пару лет назад с таким же энтузиазмом обсуждалась объявленная ОКР "Амур": все думали, что это про Луну, а это оказалось - про Ангару для Восточного.  

Приходило. Тем более, что перед этим было сообщение еще и об РД-180.

[-AVK-]

Apollo13 пишет:
Видимо в рамках существующего бюджета.

Сразу вспомнился момент.
Одно из последних заседаний МВИ перед проведением ОСИ блока "Союза-1". Данильченко докладывает об успешном пуске Антареса. Ахметов улыбаясь заявляет, что американцы все так быстро делают только потому, что у них нет ЦНИИМаша и 4 ЦНИИ))))

[Петр Зайцев]

-AVK- пишет:
 Ахметов улыбаясь заявляет, что американцы все так быстро делают только потому, что у них нет ЦНИИМаша и 4 ЦНИИ))))

Есть у них ЦНИИМАШ, называется "The Aerospace Corporation". В точности те же функции выполняет.

[Salo]

http://spacenews.com/article/launch-report/42395antares-failure-raises-questions-about-vehicle%E2%80%99s-future

Antares Failure Raises Questions About Vehicle's Future
By Jeff Foust | Oct. 31, 2014  

Oct. 28 Antares launch failure. Credit: NASA TV video screen capture
 
WASHINGTON — The explosion of an Orbital Sciences Corp. Antares rocket seconds after liftoff Oct. 28, destroying a Cygnus cargo spacecraft, will likely have a modest near-term effect on NASA and international space station operations, but a far greater one on the future of the Antares itself.
The Antares rocket lifted off from Pad 0A at the Mid-Atlantic Regional Spaceport at Wallops Island, Virginia, at 6:22 pm EDT Oct. 28. No technical problems had been reported during the countdown, and the initial seconds after liftoff appeared to be no different from the previous four Antares missions.
However, within 15 seconds after liftoff, video of the launch showed the plume from the Antares' first-stage engines suddenly brighten, followed by an explosion at the base of the rocket. The rocket fell back to the ground near the launch pad, triggering an even larger explosion that destroyed the vehicle and Cygnus spacecraft, and damaged the pad.
The cause of the failure was not immediately clear. In a statement issued 48 hours after the accident, Orbital indicated that the problem was with the rocket's first stage but was not more specific.
"All systems appeared to be performing nominally until approximately T+15 seconds at which point the failure occurred," Orbital reported in its Oct. 30 statement. "Evidence suggests the failure initiated in the first stage after which the vehicle lost its propulsive capability and fell back to the ground impacting near, but not on, the launch pad."
The mission, designated Orb-3 by NASA, was the third of eight Commercial Resupply Services (CRS) missions that Orbital Sciences is under contract to perform for the space agency. The Cygnus, named by Orbital the "SS Deke Slayton" after the late astronaut, was carrying 2,290 kilograms of cargo for the station.
NASA officials said that the failure will not have an immediate effect on ISS operations. "We're in good shape from a consumables and supplies standpoint," William Gerstenmaier, NASA associate administrator for human exploration and operations, said at an Oct. 28 press conference about three hours after the failure. "There was no cargo that was absolutely critical to us that was lost on this flight. The crew is in no danger."
ISS Program Manager Michael Suffredini said at that press conference there were four to six months of supplies on the ISS. A Russian Progress spacecraft launched to the station Oct. 29, and a Space Exploration Technologies Corp. Dragon spacecraft is planned for launch no earlier than Dec. 9 to deliver more supplies.
About one-third of the cargo on the Cygnus was food and other consumables. Another third was hardware for the station, none of which Suffredini said was irreplaceable or immediately critical for the station. The rest included 29 small satellites that would have been later deployed from the station, as well as experiments, some of which were developed by students. 

Antares' Future

While the failure was a setback to ISS operations, its effects may be greater on Orbital Sciences and the Antares program. Orbital, seeking to extend its current contract to ferry cargo to the station and to win new business for the launch vehicle, was already planning to replace the rocket's first stage engine, an effort company executives suggested might be accelerated by this failure.
The AJ-26 engines used in the Antares first stage — refurbished versions of the Soviet-era NK-33 engines — were under scrutiny prior to the launch failure. Although the engines had performed well in the previous four launches, an AJ-26 failed during a test at the NASA Stennis Space Center in Mississippi in May. Another AJ-26 failed in a test there in June 2011, a problem traced back to a fuel leak in the engine.
Neither Orbital nor Aerojet Rocketdyne, which provides the AJ-26 engines for Orbital, had disclosed the cause of the May engine failure. In a Sept. 30 speech at the International Astronautical Congress in Toronto, Orbital Executive Vice President  Frank Culbertson said the investigation into that failure was wrapping up.
"We have come up with probably two potential root causes, both of which we can screen for," he said at the conference. Engine tests were scheduled to resume in October at Stennis, but Aerojet Rocketdyne spokesman Glenn Mahone said Oct. 29 that the company had been waiting until after the Antares launch to resume those tests.
At the post-failure press conference Oct. 28, Culbertson declined to speculate on any role AJ-26 problems may have played in the launch failure. The engines used on this vehicle had gone through normal acceptance testing both at Stennis and at Wallops prior to the launch. "We didn't see any anomalies or anything that would indicate there were problems with the engine," he said.
In a conference call with financial analysts Oct. 29, Orbital executives suggested that the failure may accelerate plans they previously announced to replace the AJ-26. Orbital had planned to use the AJ-26 for the remainder of its CRS missions to the ISS, then likely switch to a new engine. The company currently has no Antares missions on its manifest beyond its remaining CRS flights.
Orbital Chief Executive David W. Thompson said in a quarterly earnings call Oct. 16 that the company had sel ected a replacement engine, but declined to announce that choice. Speculation about the new Antares engine has ranged from a solid-rocket motor provided by ATK, with whom Orbital is merging, to a derivative of the RD-180 engine from Russian manufacturer NPO Energomash.
"It is possible that we may decide to accelerate this change if the AJ-26 turns out to be implicated in the failure," Thompson said in the Oct. 29 call. The first launch of an Antares with a "second-generation" engine was about 24 months away prior to this failure, he said, but he did not know by how much Orbital could accelerate the introduction of the new engine.
Thompson said it likely would be "days, not weeks" for Orbital to narrow down the potential causes of the Oct. 28 failure. He expected the next Antares launch, previously scheduled for April 2015, would likely be delayed at least three months. "It certainly could be considerably longer than that, depending on what we find in the review," he cautioned. "I hope it would be not more than a year."
As NASA and Orbital investigate the failure, recover the ISS science lost in the accident, and make decisions on the future of the Antares program, they are — for the time being — avoiding major political scrutiny. While NASA's plans to commercialize ISS cargo and eventually crew transportation have been the subject of controversy in the past, the agency and the company got messages of condolences fr om Capitol Hill in the failure's immediate aftermath.
"We add our disappointment to the thousands in the space community who worked tirelessly in support of Tuesday evening's launch attempt at Wallops Island," Reps. Lamar Smith (R-Texas) and Steven Palazzo (R-Miss.), the chairmen of the House Science Committee and its space subcommittee, respectively, said in a statement. "We anticipate learning more about the circumstances surrounding the launch failure in the near future."
"I remain supportive of Spaceport Wallops and NASA's Commercial Cargo mission in achieving America's independence in transporting supplies to the Space Station," Sen. Barbara Mikulski (D-Md.), chairwoman of the Senate Appropriations Committee and a long-time supporter of launch activities at Wallops, said in an Oct. 29 statement.
"Something went wrong and we will find out what that is," Orbital's Culbertson said Oct. 28. "We will correct that and we will come back and fly here at Wallops again, hopefully in the very near future."
 
Twitter: @jeff_foust

[Seerndv]

"We have come up with probably two potential root causes, both of which we can screen for," he said at the conference. Engine tests were scheduled to resume in October at Stennis, but Aerojet Rocketdyne spokesman Glenn Mahone said Oct. 29 that the company had been waiting until after the Antares launch to resume those tests.
At the post-failure press conference Oct. 28, Culbertson declined to speculate on any role AJ-26 problems may have played in the launch failure. The engines used on this vehicle had gone through normal acceptance testing both at Stennis and at Wallops prior to the launch. "We didn't see any anomalies or anything that would indicate there were problems with the engine," he said.

- так и непонятно, что там в мае было. [IMG]

[m-s Gelezniak]

Петр Зайцев пишет:
Обычно такой зигзаг в американской практике делается для УВТ. Там в "локтях" стоят соединения, которые допускают вращение вокруг оси потока. Нормальные люди поставили бы сильфон, но тут такой технологией не владеют почему-то.

Тaм двa сильфонa.

[Дмитрий]

старт Антереса чудом весь цел.
Почему-то  взрыв осколками уничтожил толко часть трубопровода по которому
подается керосин на старт к ракете из цистерн.Взрывная волна ушла в стороны, только две воронки 2-yх метровые и обгорел песок рядом со стартом. 
Запyск был застрахован.

Если быстро наидут причины аварии и иx ликвидируют, то через 3 месяца Антарес запустять  опять. Сгорела вкусная еда космонавтов.

[Apollo13]

Дмитрий пишет:
Если быстро наидут причины аварии и иx ликвидируют, то через 3 месяца Антарес запустятьопять.

Скорее не через 3 месяца, а на 3 месяца позже чем планировалось.

[Liss]

Отказ ТНА. НК-33 отлетались :-(

http://www.orbital.com/NewsInfo/release.asp?prid=1921

Orbital Announces Go-Forward Plan for NASA's Commercial Resupply Services Program and the Company's Antares Launch Vehicle

-- Revised Approach Will Maintain Required ISS Cargo Deliveries in 2015 and 2016 --

-- Accelerated Propulsion System Upgrade of Antares to be Implemented at Wallops --

(Dulles, VA 5 November 2014) – Orbital Sciences Corporation (NYSE: ORB), one of the world's leading space technology companies, today announced comprehensive plans to fulfill its contract commitments under NASA's Commercial Resupply Services (CRS) program as well as to accelerate an upgrade of the Antares medium-class launcher's main propulsion system. Under the new approach and in line with Orbital's existing CRS contract, all remaining cargo will be delivered to the International Space Station (ISS) by the end of 2016. There will be no cost increase to NASA and only minor adjustments will be needed to the cargo manifest in the near term.

Orbital's Antares launch failure Accident Investigation Board (AIB) is making good progress in determining the primary cause of last week's failure. A preliminary review of telemetry and video data has been conducted and substantial debris from the Antares rocket and its Cygnus payload has been collected and examined. While the work of the AIB continues, preliminary evidence and analysis conducted to date points to a probable turbopump-related failure in one of the two Aerojet Rocketdyne AJ26 stage one main engines. As a result, the use of these engines for the Antares vehicle likely will be discontinued.  

To maintain the CRS program's critical ISS supply line, Orbital plans an early introduction of its previously selected Antares propulsion system upgrade in 2016. This will be preceded by one or two non-Antares launches of the company's Cygnus cargo spacecraft to the ISS in 2015-2016, employing the spacecraft's compatibility with various launch vehicles and its flexibility to accommodate heavier cargo loads as launcher capacity permits. In addition, the company expects repairs to the Mid-Atlantic Regional Spaceport (MARS) launch complex at NASA's Wallops Flight Facility to be undertaken quickly, allowing launch operations to continue at Wallops Island with the upgraded Antares beginning in 2016.

"Orbital is taking decisive action to fulfill our commitments to NASA in support of safe and productive operations of the Space Station. While last week's Antares failure was very disappointing to all of us, the company is already implementing a contingency plan to overcome this setback. We intend to move forward safely but also expeditiously to put our CRS cargo program back on track and to accelerate the introduction of our upgraded Antares rocket," said Mr. David W. Thompson, Orbital's Chairman and Chief Executive Officer.

"Exact financial impacts to Orbital will depend on which of several specific options for near-term launches is selected, but they are not expected to be material on an annual basis in 2015. In all cases, no significant adverse effects are projected in 2016 or future years, in part because the cost of the Antares propulsion system upgrade was already part of our internal investment plan during that time," he added.

"We very much appreciate the tremendous support Orbital has received from NASA and Virginia's MARS commercial spaceport team over the last seven years on our Antares rocket and CRS cargo programs. We look forward to working closely with them to quickly recover from last week's setback," Thompson concluded.

[Apollo13]

As a result, the use of these engines for the Antares vehicle likely will be discontinued.  

!!!!

[Apollo13]

To maintain the CRS program's critical ISS supply line, Orbital plans an early introduction of its previously selected Antares propulsion system upgrade in 2016. This will be preceded by one or two non-Antares launches of the company's Cygnus cargo spacecraft to the ISS in 2015-2016, employing the spacecraft's compatibility with various launch vehicles and its flexibility to accommodate heavier cargo loads as launcher capacity permits.

[Apollo13]

Капец...

[Apollo13]

29.10.2014 00:23:54

Salo пишет:
НК-33 кажется отлетался.  

Сало пророк...

http://novosti-kosmonavtiki.ru/forum/messages/forum10/topic14401/message1303434/#message1303434

[Apollo13]

Интересно где они за пол года свободную ракету возьмут? Подвинут какой-нибудь GPS? В 2015 как раз 2 пуска Атласа-401.

[m-s Gelezniak]

Не фaкт.
Ну нaвернётся после переделок у очередного умельцa что нибудь из серии 180-191ых, что тогдa?
Кудa будут метться хомячки?
Дaже если ТНA то вопросов остётся, от кaк хрaнили до сколько гоняли.

[Apollo13]

m-s Gelezniak пишет:
Не фaкт.

Что не факт?

[m-s Gelezniak]

[USER=16811]Apollo13 пишет:
Отказ ТНА. НК-33 отлетались

[/USER] пишет:
Отказ ТНА. НК-33 отлетались


Apollo13[/USER] пишет:

m-s Gelezniak

пишет:
Не фaкт.

Что не факт?

Отказ ТНА. НК-33 отлетались

[Apollo13]

По крайней мере на Антаресе. Вряд ли Орбитал на своем сайте стал бы писать такое, если бы решение больше не летать на НК-33 и использовать чужую ракету в 2015-2016 уже не было принято.

[m-s Gelezniak]

Apollo13 пишет:
По крайней мере на Антаресе. Вряд ли Орбитал на своем сайте стал бы писать такое, если бы решение больше не летать на НК-33 и использовать чужую ракету в 2015-2016 уже не было принято.

Они оствляют себя без резервa. По нескольким позициям.