Dragon CRS1, Orbcomm 2G=Falcon 9 v1.0 - Canaveral SLC-40 - 08.10.12 00:35 UTC

[Штуцер]

Маску замечание : не проверил лично девятое сопело

Первое...

[Александр Репной]

Для наблюдателей ИСЗ: видимость КК Dragon в средних широтах северного полушария не благоприятная. Все витки, в т. ч и вечерние - теневые. В южных широтах 9 октября теоретически есть один видимый вечерний виток.

[Salo]

Slow motion video of anomaly event of SpaceX launch on 07/10.

[Старый]

Я читал и слышал другую версию. Впрочем, это уже не важно.

Зачем слушать и читать если на видеокадрах всё видно своими глазами? Мгновенный взрыв ускорителя без всяких прогаров.

[Salo]

На NSF припомнили:
http://www.spacenews.com/civil/spacex-acknowledges-falcon-engine-anomaly-during-latest-launch.html

[Старый]

Slow motion video of anomaly event of SpaceX launch on 07/10.

Похоже и вправду сначала взрыв двигателя а потом уже посыпались обломки обтекателя...

[Bizonich]

Slow motion video of anomaly event of SpaceX launch on 07/10.

И кто теперь будет спорить, что взрыва не было? Salo, спасибо. Плюс видно, что обломок, похожий и на обтекатель двигателя и на часть сопла и по габаритам и по форме, пролетел несколько позже. Мое мнение только укрепилось - отлетел обтекатель. Г-н, Технократ, простите за неиспользование вашего термина.

[Salo]

http://blog.al.com/breaking/2012/10/spacex_analyzing_engine_failur.html


SpaceX analyzing engine failure on Dragon spacecraft destined for space station

Published: Monday, October 08, 2012, 1:07 PM Updated: Monday, October 08, 2012, 1:30 PM
Paul Gattis | pgattis@al.com By Paul Gattis | pgattis@al.com

HUNTSVILLE, Alabama -- The SpaceX Dragon spacecraft remains on schedule for a docking Wednesday to deliver supplies to the International Space Station.

But SpaceX officials are studying an issue that developed on Dragon 79 seconds after its launch on Sunday night. One of the Falcon 9 rocket engines lost pressure suddenly, causing an immediate shutdown of the engine, according to a SpaceX mission update today.

"Approximately one minute and 19 seconds into last night's launch, the Falcon 9 rocket detected an anomaly on one first stage engine," the update said. "Initial data suggests that one of the rocket's nine Merlin engines, Engine 1, lost pressure suddenly and an engine shutdown command was issued immediately.

"We know the engine did not explode, because we continued to receive data from it. Our review indicates that the fairing that protects the engine from aerodynamic loads ruptured due to the engine pressure release, and that none of Falcon 9's other eight engines were impacted by this event."

Once the pressure issue developed, Falcon 9 responded in the appropriate manner, SpaceX said. The update also drew parallels with the Saturn V rocket during NASA's Apollo program, which SpaceX said twice lost an engine during launch.

"As designed, the flight computer then recomputed a new ascent profile in real time to ensure Dragon's entry into orbit for subsequent rendezvous and berthing with the ISS," the SpaceX update said. "This was achieved, and there was no effect on Dragon or the cargo resupply mission.

"Falcon 9 did exactly what it was designed to do. Like the Saturn V, which experienced engine loss on two flights, Falcon 9 is designed to handle an engine out situation and still complete its mission."

[Salo]

Пошаговое видео "аномалии":

http://forum.nasaspaceflight.com/index.php?topic=29130.msg962868#msg962868

[Salo]

О грустном:

"Falcon 9 did not make its second upper stage burn, and the Orbcomm satellite is being tracked in low orbit instead of its elliptical target orbit."

[Salo]

Красота спасёт мир:
http://launchphotography.com/SpX-1.html

[Salo]

История попала в прессу:
http://arstechnica.com/science/2012/10/that-smooth-spacex-launch-turns-out-one-of-the-engines-exploded/

That smooth SpaceX launch? Turns out one of the engines came apart

Video shows craft continuing to orbit after burst of flame, falling debris.

by John Timmer - Oct 8 2012, 7:15pm -300

Those of us who watched the live feed of last night's Falcon 9 launch could be forgiven for assuming that everything went according to plan. All the reports that came through over the audio were heavy on the word "nominal," and the craft successfully entered an orbit that has it on schedule to dock with the International Space Station on Wednesday. But over night, SpaceX released a slow-motion video of what they're calling an "anomaly."

Watch the video embedded below (starting at about the 27-second mark), though, and the term anomaly will look like a serious understatement. The video clearly shows a larger burst of flame within the normal plume of rocket exhaust, followed shortly by debris falling fr om the rocket.

The Falcon 9, as its name implies, has nine engines, and is designed to go to orbit if one of them fails. On-board computers will detect engine failure, cut the fuel supply, and then distribute the unused propellant to the remaining engines, allowing them to burn longer. This seems to be the case where that was required, and the computers came through. The engines are also built with protection to limit the damage in cases wh ere a neighboring engine explodes, which appears to be the case here.

SpaceX has indicated that it will provide a more detailed report on the event later today. We'll update the story when that becomes available.



The remaining engines shrug off the apparent explosion of their neighbor.

Update:

SpaceX has released the following statement:

Approximately one minute and 19 seconds into last night's launch, the Falcon 9 rocket detected an anomaly on one first stage engine. Initial data suggests that one of the rocket's nine Merlin engines, Engine 1, lost pressure suddenly and an engine shutdown command was issued immediately. We know the engine did not explode, because we continued to receive data from it. Our review indicates that the fairing that protects the engine from aerodynamic loads ruptured due to the engine pressure release, and that none of Falcon 9's other eight engines were impacted by this event.

As designed, the flight computer then recomputed a new ascent profile in real time to ensure Dragon's entry into orbit for subsequent rendezvous and berthing with the ISS. This was achieved, and there was no effect on Dragon or the cargo resupply mission.

Falcon 9 did exactly what it was designed to do. Like the Saturn V, which experienced engine loss on two flights, Falcon 9 is designed to handle an engine out situation and still complete its mission.

[Петр Зайцев]

Вот официальный прессер от ОРБКОМ-а:

The OG2 prototype satellite, flying as a secondary payload on this mission, was separated from the Falcon 9 launch vehicle at approximately 9:00 pm EST. However, due to an anomaly on one of the Falcon 9's first stage engines, the rocket did not comply with a pre-planned International Space Station (ISS) safety gate to allow it to execute the second burn. For this reason, the OG2 prototype satellite was deployed into an orbit that was lower than intended. ORBCOMM and Sierra Nevada Corporation engineers have been in contact with the satellite and are working to determine if and the extent to which the orbit can be raised to an operational orbit using the satellite's on-board propulsion system.

[zeaman]

Вот информация про ОрбКомм:
http://www.orbcomm.com/Collateral/Documents/English-US/ORBCOMM%20Launches%20Prototype%20OG2%20Satellite%20FINAL.pdf

В двух словах - в связи с неисполнением критериев безопасности для МКС, второй запуск второй ступени отменили и спутник отделили на  орбиту, ниже чем планировалось. Связь со спутником есть, определяется возможность подъема орбиты средствами спутника.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=29130.msg963266#msg963266

johnbellora пишет:

the 2nd stage ran to low on fuel for what ever reason and the orbit is now in an elleptical orbit to low and the average is even with the space station. It will decay soon and plumet back to earth. The powers that be are going to try to use the remaining fuel to steer it into a more circular orbit which might get it to last a few months. I actually have a large triplexer aboard. Interesting to hear from both sides as to what is going on.

[SFN]

http://blogs.discovermagazine.com/badastronomy/2012/10/08/spacex-falcon-9-lost-an-engine-on-the-way-up-dragon-on-its-way-to-iss/
все показывают этот рапид
You can see a bright spot glowing on the upper right engine, then what looks like shrapnel blowing back as well, so it appears something catastrophic happened to the engine. I can think of many things that could've caused this – a crack in the engine bell that failed when it got hot, a faulty valve, something in the pipes – but I'm just spitballing; hopefully the folks at SpaceX will be able to determine the cause from the engine telemetry.
SpaceX:
"Approximately one minute and 19 seconds into last night's launch, the Falcon 9 rocket detected an anomaly on one first stage engine. Initial data suggests that one of the rocket's nine Merlin engines, Engine 1, lost pressure suddenly and an engine shutdown command was issued immediately. We know the engine did not explode, because we continued to receive data from it.[/size] Our review indicates that the fairing that protects the engine from aerodynamic loads ruptured due to the engine pressure release, and that none of Falcon 9's other eight engines were impacted by this event."
Значит датчики телеметрии остались работоспособными.
[UPDATE]

[Not]

История попала в прессу:

Странно что до этого они врали совершенно иначе

Mission control called it "a picture-perfect launch and a flawless flight of Falcon."

http://www.cnn.com/2012/10/07/us/spacex-launch/index.html?hpt=hp_bn1

[Salo]

SFN пишет:

http://blogs.discovermagazine.com/badastronomy/2012/10/08/spacex-falcon-9-lost-an-engine-on-the-way-up-dragon-on-its-way-to-iss/
все показывают этот рапид
You can see a bright spot glowing on the upper right engine, then what looks like shrapnel blowing back as well, so it appears something catastrophic happened to the engine. I can think of many things that could've caused this – a crack in the engine bell that failed when it got hot, a faulty valve, something in the pipes – but I'm just spitballing; hopefully the folks at SpaceX will be able to determine the cause from the engine telemetry.
SpaceX:
"Approximately one minute and 19 seconds into last night's launch, the Falcon 9 rocket detected an anomaly on one first stage engine. Initial data suggests that one of the rocket's nine Merlin engines, Engine 1, lost pressure suddenly and an engine shutdown command was issued immediately. We know the engine did not explode, because we continued to receive data from it. Our review indicates that the fairing that protects the engine from aerodynamic loads ruptured due to the engine pressure release, and that none of Falcon 9's other eight engines were impacted by this event."
Значит датчики телеметрии остались работоспособными.
[UPDATE: ORBCOMM has confirmed the satellite was placed into the wrong orbit due to the engine failure. They, along with aerospace company Sierra Nevada, are looking into using the satellite's onboard propulsion system to raise the orbit.]

Конечно не взорвался! Он так быстро был выключен по команде АВД, что отлетел обтекатель и кое-что ещё!

[Salo]

Salo пишет:

История попала в прессу:

Not пишет:

Странно что до этого они врали совершенно иначе

CNN пишет:

Mission control called it "a picture-perfect launch and a flawless flight of Falcon."

http://www.cnn.com/2012/10/07/us/spacex-launch/index.html?hpt=hp_bn1

Больше всего мне понравилась история с Orbcomm 2G. :roll:

[Старый]

Я так думаю датчики не находятся на сопле а находятся гдето ближе к головке двигателя которая не отлетела. "Быструю потерю давления" можно объяснить только разрывом камеры сгорания, как и отрыв обтекателя "выпущенными газами".