Dragon Crew v.2.0

[opinion]

Not пишет:

opinion пишет:

Stephen Clark, Spaceflight Now: Just a quick follow up. We heard during the ASAP meeting, I think last week, about vibroacoustic loads during this test. Were you doing any testing in the vibroacoustic environment during that activation?
 Hans Koenigsmann, SpaceX: Right. We did do some testing, I've forgot, I don't think we did it with this particular Dragon, but we generally do vibroacoustic testing in the test chamber, so we know things are basically designed for that environment. That test itself, when you fire your thrusters, is also a good test for that. But we didn't get to this point. [off-mic comment] Yes, exactly, we weren't at the point where the thrust would create vibroacoustic noise at that point in time. Like I said, you know, this is all pretty new for us in a sense. The investigation is going on. I don't have a lot of information where this is going. And every guess that I would give you would probably just turn out to be the wrong guess in the end anyways, unfortunately.

Вопрос про виброакустические испытания, упомянутые ASAP.

Ханс точно не помнит, но думает, что этот конкретный Дракон им не подвергался. Работающие двигатели корабля создают виброакустическую нагрузку, но не такую большую.

Это просто праздник какой то. Его спросили - проводились ли в ЭТОМ тесте виброакустические испытания. Ответ - "я точно не помню, забыл".  

Не может же он прямо сказать, что глава ASAP чушь сморозила! Поэтому просто объяснил что к чему. Виброакустические тесты проводятся в специальной камере на специальных (а не лётных) экземплярах. Во время прожига - ну да, тоже были бы какие-то нагрузки, но до этого дело не дошло.

[mihalchuk]

opinion пишет:
Не может же он прямо сказать, что глава ASAP чушь сморозила! Поэтому просто объяснил что к чему. Виброакустические тесты проводятся в специальной камере на специальных (а не лётных) экземплярах. Во время прожига - ну да, тоже были бы какие-то нагрузки, но до этого дело не дошло.

По сути они стали виброакустическими, как только что-то пошло не так.

[tnt22]

Chris B - NSF‏ @NASASpaceflight 30 мин. назад

Hazard Operations Roadblocks in place for LZ-1 from today, per safing hardware components relating to the DM-1 Dragon test anomaly. "May generate an orange cloud." Will only take place if weather conditions are deemed acceptable per haz ops.

[tnt22]

45th Space Wing‏Подлинная учетная запись @45thSpaceWing 26 мин. назад

SpaceX personnel, under supervision of the 45th SW Safety office, will perform venting if weather permits for several tanks on Cape Canaveral AFS on May 8, 2019. The venting may create an orange cloud however public safety will not be affected.


Chris B - NSF‏ @NASASpaceflight 12 мин. назад

There's a public notice about the safing of COPVs from the deceased DM-1 Dragon at LZ-1.

Pending weather conditions.

[tnt22]

Rep. Mo Brooks Questioning About SpaceX Parachute Failures

Michael Baylor

Опубликовано: 8 мая 2019 г.

The questioning came during a May 8th, 2019 hearing titled, "Keeping Our Sights on Mars: A Review of NASA's Deep Space Exploration and Lunar Proposal."

(4:07)

[tnt22]

https://tass.ru/kosmos/6415411

9 МАЯ, 00:42
SpaceX провела в апреле неудачные испытания парашютной системы

Замдиректора NASA по пилотируемым программам Билл Герстенмайер уточнил, что при испытаниях три из четырех парашютов не сработали штатно

ВАШИНГТОН, 9 мая. /ТАСС/. Компания SpaceX провела в апреле на полигоне в штате Невада неудачные испытания парашютной системы для мягкой посадки космического корабля. Об этом сообщил в среду на слушаниях в комитете Палаты представителей по науке, космосу и технологиям Конгресса США заместитель директора NASA по пилотируемым программам Билл Герстенмайер.

"При испытании системы из четырех парашютов три из них не сработали штатно", - пояснил он, указав при этом, что спускаемый аппарат "был поврежден при падении на землю", но не уточнив характера повреждений.

"Результаты этого испытания не были удовлетворительными, мы не получили тех результатов, на которые рассчитывали, но появилась информация, которая будет учтена при создании в будущем парашютных систем, - продолжал замдиректора NASA. - Нам предстоит выяснить, была ли неудача результатом каких-то обстоятельств, возникших при самом испытании, или же проблема с общей конструкцией системы".

[tnt22]

К #2185, #2186

Jeff Foust‏ @jeff_foust 12:44 PDT - 8 мая 2019 г.

Gerst: in April "single-out" test, one parachute of four was "proactively failed" but the other three did not operate properly. Don't know if it is a problem with the parachutes or the test itself.


Stephen Clark‏ @StephenClark1 12:46 PDT - 8 мая 2019 г.

Rep. Mo Brooks asks about SpaceX Crew Dragon parachute test last month in Nevada. NASA's Gerstenmaier confirms the test failed. One of four parachutes on a Crew Dragon test sled was "proactively failed" and the three remaining parachutes did not operate properly.

[Дмитрий В.]

Похоже, у spaceX какие-то системные проблемы. Проектирование корабля ведется уже 15 лет, а первый пилотируемый полёт всё также где-то в будущем

[Alex_II]

Дмитрий В. пишет:
Проектирование корабля ведется уже 15 лет,

Ты ничего не попутал? 15 лет назад начали делать первого Дракона - грузового...

[Astro Cat]

То два парашюта НАСА не устраивало. Сделайте три! Сделали! Дракон слетал к МКС и на них приводнился. Теперь уже надо четыре! Они стали путаться. Странно? )))

[mind22]

О чем еще не стал нам рассказать Маск в твиттере? Почему эта информация всплыла только сейчас?

[Denis Voronin]

Astro Cat пишет:
То два парашюта НАСА не устраивало. Сделайте три! Сделали! Дракон слетал к МКС и на них приводнился. Теперь уже надо четыре! Они стали путаться. Странно? )))

А чем их три то не устроило? Ну два объяснимо, но три как раз оптимально, они и располагаются как надо. Или они в КСП переиграли где парашюты друг для друга прозрачны и можно хоть стопиццот ставить?

[tnt22]

Eric Berger‏Подлинная учетная запись @SciGuySpace 9 мин. назад

SpaceX says it has flown 19 parachute tests for Crew Dragon, with a number of additional tests planned before human flights.


6 мин. назад

(Very) unofficially, a source says they may switch to a thicker parachute design to compensate for issues discovered in the test. Although not ideal, this is a fairly normal part of spacecraft development.

[tnt22]

https://spacenews.com/crew-dragon-parachutes-failed-in-recent-test/

Crew Dragon parachutes failed in recent test
by Jeff Foust -- May 9, 2019


A SpaceX Crew Dragon spacecraft descends under its parachutes at the end of the Demo-1 test flight in March. A test of the parachutes for that spacecraft in April failed when the parachutes didn't open fully. Credit: NASA/Cory Huston

WASHINGTON -- A test of parachutes for SpaceX's Crew Dragon spacecraft did not go as planned last month, NASA and SpaceX confirmed May 8.

During a hearing of the House Science Committee's space subcommittee on NASA's exploration plans, Rep. Mo Brooks (R-Ala.) quizzed agency officials on the testing of parachutes for commercial crew vehicles, zeroing in on a specific, previously undisclosed test in April.

"Did SpaceX conduct, in April of 2019, a parachute test in Delamar Dry Lake, Nevada?" he asked. "What happened in that test?"

"The test was not satisfactory," responded Bill Gerstenmaier, NASA associate administrator for human exploration and operations and one of the witnesses at the hearing. "We did not get the results we wanted, but we learned some information that's going to affect, potentially, future parachute designs."

In that test, one of the four parachutes was "proactively failed" to demonstrate the "single-out" capability of the overall system. However, he said, "the three remaining chutes did not operate properly." That caused a test sled to hit the ground faster than expected, damaging it.

An industry source, speaking on background after the hearing, confirmed the problem with what SpaceX considered an "advanced development test" of the parachute system "specifically designed to measure loads within each parachute canopy." One of the four chutes was deliberately disabled, but the other three did not open fully.

Gerstenmaier said the cause of the failure wasn't known yet. "We still need to understand whether it was a test setup configuration coming out of the aircraft or if there was something associated with the packing of the parachutes, the rigging, all that," he said. He noted that the parachutes had instrumented lines to measure loads, which will provide important data for that investigation.

He emphasized that such failures are part of the overall testing process that will improve the ultimate design of the parachute system. "I don't see this as a negative. This is why we test. This is why we want to push things," he said. "This is a gift to us. We've gotten data that is unique that will help us design and understand if this is something that needs to be fixed or if it's something that was a nuance of the test."

Parachute development has been an issue for both Boeing and SpaceX during commercial crew development, an issue highlighted at several recent meetings of the Aerospace Safety Advisory Panel. "Clearly, one cannot risk crew without there being a complete confidence in the parachute design," Don McErlean, a member of the panel, said at a meeting last October that discussed issues with both companies' testing of parachutes.

Patricia Sanders, chair of the panel and another witness at the May 8 hearing, noted there have been a "large number" of parachute tests conducted for the commercial crew vehicles as well as for the Orion spacecraft. "They've made a great deal of progress in understanding those uncertainties involved in that," she said. "It's one of the larger risks they have."

"There have been a number of positive tests" of parachute systems in recent months, she said. "There have been a few less satisfactory results and some tests that are indicating that there may need to be some redesign or some adjustments made to the design." She didn't get into specifics of those tests beyond the problem with the April SpaceX test.

SpaceX said that, prior to last month's test, it had performed five similar "parachute-out" tests where one of the four parachutes deliberately did not open. All of those were completed successfully. The company has performed 19 tests of the parachute system to date with "a number of additional tests" planned before the Demo-2 test flight of the Crew Dragon vehicle, with two NASA astronauts on board.

[tnt22]

https://spaceflightnow.com/2019/05/09/commercial-crew-capsules-still-beset-by-parachute-problems/

Commercial crew capsules still beset by parachute problems
May 9, 2019 | Stephen Clark


SpaceX performs a parachute test for their Dragon capsule over the Delamar Dry Lake in this file photo from 2016. Credit: SpaceX

A malfunction during a drop test over Nevada last month for SpaceX's Crew Dragon program has engineers re-examining the crew capsule's parachutes, and Boeing has encountered similar parachute failures during testing for its commercial crew capsule, a senior NASA official confirmed Wednesday.

The SpaceX parachute test failure occurred the same month as the explosion of a Crew Dragon spacecraft during a ground test at Cape Canaveral. The parachute drop test over Delamar Dry Lake in Nevada last month did not involve a Crew Dragon capsule, but used a simple metal test sled.

"It failed," said Bill Gerstenmaier, associate administrator of NASA's human exploration and operations directorate. "The parachutes did not work as designed."

The parachutes did not fully open, sources said, and the test sled impacted the ground at a higher-than-expected velocity. Gerstenmaier said the sled was damaged upon impact. The advanced development test was intended to measure loads within each parachute canopy, according to an industry source.

No one was hurt in the test accident.

"It was one single-out test for this parachute," Gerstenmaier said Wednesday in a hearing before the House Committee on Science, Space and Technology's subcommittee on space and aeronautics. "So typically, that test would involve four parachutes, one was proactively failed ahead of time and the three remaining chutes did not operate properly."

Gerstenmaier was asked about the outcome of the SpaceX parachute test by Rep. Mo Brooks, R-Alabama, whose district includes Huntsville and Decatur, home of NASA's Marshall Space Flight Center and the rocket factory for United Launch Alliance, a 50-50 joint venture between Boeing and Lockheed Martin, and a chief rival of SpaceX.

The parachute test failure was not publicized by NASA or SpaceX before Wednesday's congressional hearing.

"The good thing on the test was we had instrumented lines going up to the parachutes, so we know exactly what the loads were in the system," Gerstenmaier said. "But we still need to understand whether it was a test set up configuration coming out of the aircraft or if there was something associated with the packing of the parachutes, the rigging, all of that. This is part of the learning process. By these failures, we're going to learn the data and information to end up with a safe design for our crews. So I don't see this as a negative, this is why we test, this is why we want to push things."


SpaceX's Crew Dragon spacecraft descends under its four main parachutes March 8 after a test flight to the International Space Station. Credit: NASA/Cory Huston

Engineers are investigating whether the parachute malfunction was caused by a problem with the chutes themselves, or as a consequence from the way the test was conducted.

"The test was not satisfactory, we did not get the results we wanted," he said. "But we learned some information that's going to affect potentially future parachute designs. The other thing we need to understand (are the) test-unique circumstances. Was it driven by an actual design problem in the hardware, or was it driven by the set-up of the test or the particular equipment that was used during the test?"

SpaceX has completed 19 tests of the Crew Dragon's parachute system to date, with a number of additional tests planned before astronauts fly on the spaceship. SpaceX had successfully performed five "parachute-out" tests, in which one of the chutes was deliberately disabled, before last month's test accident, according to an industry source.

NASA officials have long identified parachutes as a concern for SpaceX and Boeing crew capsules, which are in the final stages of development before they carry astronauts into orbit for the first time. After completing their test programs, the SpaceX and Boeing capsules will begin ferrying astronauts to and from the International Space Station, ending NASA's sole reliance on Russian Soyuz spacecraft for crew transportation.

A SpaceX Dragon cargo capsule suffered a parachute anomaly during a return from the International Space Station last year, but recovery crews retrieved the supply ship from the Pacific Ocean as intended.

SpaceX's Dragon cargo ship uses the same main parachutes as the Crew Dragon, also known as Dragon 2. But the heavier Crew Dragon, which is a significant different spacecraft than the cargo Dragon variant, requires four main parachutes for to slow down for splashdown in the ocean, not the three main chutes used on the currently-flying cargo freighter, sometimes known as Dragon 1.

The Crew Dragon's first test flight in space in early March was successful, and the capsule's parachutes functioned as designed after a six-day unpiloted mission to the space station. The spacecraft that flew to the station in March was destroyed April 20 during an accident at Cape Canaveral, which occurred as the capsule's SuperDraco abort engines were activated for a hold-down firing on a test stand.

Before the April 20 accident, SpaceX aimed to re-fly the Crew Dragon spacecraft on an in-flight abort test in July. Officials hoped to launch a two-man team of NASA astronauts -- Bob Behnken and Doug Hurley -- on the next Crew Dragon spacecraft to the space station in late September or early October.

SpaceX and NASA officials have not indicated how last month's hotfire test mishap, or the parachute failure, might impact the schedule for the Crew Dragon's first flight with astronauts on-board.

 Скрытый текст:

Boeing's CST-100 Starliner crew capsule, which will parachute to ground landings in the Western United States, is set for its first unpiloted test flight to the space station in August, followed by a demonstration mission with three astronauts on-board as soon as November. The Starliner missions will launch on ULA's Atlas 5 rocket, while SpaceX uses its own Falcon 9 launcher for Crew Dragon missions.

Patricia Sanders, chair of NASA's Aerospace Safety Advisory Panel, told members of Congress on Wednesday that parachutes are one of the largest risks faced by SpaceX and Boeing engineers working on NASA's commercial crew program.

"There have been a number of very positive tests, results confirming what we would expect, or desire, in terms of re-entry performance of the parachutes," Sanders said. "There have been a few less satisfactory results, and some tests that are indicating there may need to be some redesign or some adjustments made to the design.

"Those are important to get right before you launch humans," she said.

Lawmakers did not ask Gerstenmaier about Boeing's recent parachute test results. But in response to a question from Spaceflight Now after the hearing, he confirmed that Starliner parachute drop tests have encountered anomalies similar to the one suffered by SpaceX last month.

"We've gotten data that is unique, that will help us understand if this is something that needs to be fixed or if it's something that's just a nuance of the test and the configuration," Gerstenmaier said of last month's SpaceX parachute test failure.

[Дмитрий В.]

Alex_II пишет:

Дмитрий В. пишет:
Проектирование корабля ведется уже 15 лет,

Ты ничего не попутал? 15 лет назад начали делать первого Дракона - грузового...

Напомню, что в рамках COST SpaceX предлагала два варианта "Дракона" - пилотируемый и грузовой, работа над ними началась в 2004 г. И если бы Маск не выпендривался с "инновациями" типа многоразовости и реактивной посадки, мог бы давно иметь рабочую лошадку в виде банального, но простого и надёжного пилотируемого "Дракона". Похоже, вся эта "новизна" выходит боком - в виде наслаивающихся друг на друга просчётов и ошибок.

[Дмитрий В.]

Ой, напутал немного: не 15, а 16 лет. "В марте 2006 г. SpaceX заявила о завершении трёхлетнего цикла проектирования и приступила к изготовлению корабля" (НК №7, 2006). Забавно, что в первоначальном виде корабль Dragon напоминал DC-X, но затем был перепроектирован в обычный капсульный корабль, по компоновке напоминающий CST-100 (с ПАО, в котором размещалась объединённая ДУ для довыведения корабля на орбиту, орбитального маневрирования, сближения с МКС, схода с орбиты и аварийного спасения)..

[Alex_II]

Дмитрий В. пишет:
Похоже, вся эта "новизна" выходит боком - в виде наслаивающихся друг на друга просчётов и ошибок.

Ну да - кто ничего не делает - тот не ошибается... Хотя нет - косяков хватает и у Союзов с Прогрессами, так что ничегонеделание тоже не помогает...
А так - грузовой Дракон и пилотируемый - похожи друг на друга примерно как Восход и Союз...

[Искандер]

Denis Voronin пишет:

Astro Cat пишет:
То два парашюта НАСА не устраивало. Сделайте три! Сделали! Дракон слетал к МКС и на них приводнился. Теперь уже надо четыре! Они стали путаться. Странно? )))

А чем их три то не устроило? Ну два объяснимо, но три как раз оптимально, они и располагаются как надо. Или они в КСП переиграли где парашюты друг для друга прозрачны и можно хоть стопиццот ставить?

Сначала было три, но NASA не устроила скорость спуска в случае выхода из строя одного парашюта.
Появилось аж четыре. Теперь проблемы.

[Искандер]

Дмитрий В. пишет:
Ой, напутал немного: не 15, а 16 лет. "В марте 2006 г. SpaceX заявила о завершении трёхлетнего цикла проектирования и приступила к изготовлению корабля" (НК №7, 2006). Забавно, что в первоначальном виде корабль Dragon напоминал DC-X, но затем был перепроектирован в обычный капсульный корабль, по компоновке напоминающий CST-100 (с ПАО, в котором размещалась объединённая ДУ для довыведения корабля на орбиту, орбитального маневрирования, сближения с МКС, схода с орбиты и аварийного спасения)..

Парашютная система заказная позиция. Иксы её сами не делают, впрочем как и Боинг, и БлуОриджин.
Поэтому тут ещё большой вопрос, кто в этом безобразии виноват.
Как по мне - NASA. ;-)