Dragon SpX-2 (CRS2) - Falcon 9 v1.0 - Canaveral SLC-40 - 01.03.2013 15:10 UTC

[Старый]

Чебурашка пишет:
А не было ли подобной истории с одним из "Аполлонов", летящих к Скайлабу? Тогда всё закончилось хорошо.

Там моторчики сдохли вроде уже после стыковки.

[Ну-и-ну]

Прессуха через 3 минуты.

[instml]

TODAY: SpaceX and NASA will hold a media teleconference at 3 p.m. EST to discuss the latest information about the company's second cargo mission to the International Space Station under NASA's Commercial Resupply Services contract.

 The teleconference participants are:

 •   Elon Musk, chief designer and CEO, SpaceX
 •   Gwynne Shotwell, president, SpaceX
 •   William Gerstenmaier, associate administrator for Human Exploration and Operations at NASA Headquarters, Washington
 •   Michael Suffredini, International Space Station program manager

http://www.nasa.gov/news/media/newsaudio/index.html

[Ну-и-ну]

http://www.nasa.gov/news/media/newsaudio/index.html

[anik]

Elon Musk ‏@elonmusk Pods 1 and 4 now online and thrusters engaged. Dragon transitioned from free drift to active control. Yes!!

[Ну-и-ну]

Запустили 4-й блок. Восстановили контроль ориентации.

[Старый]

Ну вот, даже до завтра не дождались.

[Ну-и-ну]

Надеются включить остальные два.

[Reader]

Косяки ПО КА, который только что отправился в лёт,имеют несомненный приоритет над всеми остальными

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=31239.msg1020017#msg1020017

Chris Bergin пишет:

Elon on the thruster system.

1 and 4 are now online and working nominally.

2 and 3 now in work. Looking quiet good. Want to check all the parameters before turning them on. Optimistic all four will come online.

Chris Bergin пишет:

Gerst enjoyed watching the team in the MCC. Solar array was in an off nominal condition, but went well.

Tough to work without attitude control.

[Salo]

Chris Bergin пишет:

Suff is also happy. Saturday berthing is off. Have flexibility in the berthing and unberthing dates - have options.

No decision on berthing date until they have evaluated the thrusters.

[anik]

А клапан-то застрял...

Во время пресс-конференции стало известно, что работают уже все четыре группы двигателей!

[Ну-и-ну]

О. говорят всё включили.

[Salo]

Suff: No berthing opportunity for tomorrow morning. Will plan berthing date later.

Question to Elon: "Was it a hardware or software problem"?

Blockage or stuck valve appear to have been issue at this stage.

Bill Harwood asks Elon "what exactly went wrong" ...

E - be careful about assessing root cause too early, one possibility is some blockage in the ox pressurization, which we freed. Or maybe a stuck valve which we unstuck. Cycling the valves to pressure hammer them did it. As always till we have more time hard to say, just a guess

Wow, hardware problem, stuck valve.  Had to "pressure hammer" and cycle it to get it unstuck.

Musk: Potentially some blockage in oxidizer pressurization.

Questions - on what went wrong.

Too early to assess root cause. Could be some blockage in the oxidizer press system, maybe a valve. Have freed it up by pressure hammering. Need more time, so this is prelim info.

All four oxidizer tanks holding their pressure now.

Q: what does SpaceX need to do to satisfy NASA that it is safe to dock?

Gerst: we will try to confirm failure modes, make sure there is redundancy and ensure ISS not in jepoardy, which we do as we go with maneuvering... we will tell how well things are operating as it gets closer

Suff: not much to add. need 3 of 4 working, and they are getting all 4 up. We watch and evaluate.. we continue to plan for berthing opps as Dragon approaches but it won't enter the protected ara till we are comfy

On ensuring NASA are happy with Dragon arriving.

Gerst wants to confirm the likely cause, and confident in redundancy. Getting into the berthing box will show how it's performing.

Suff: Require 3 of 4 quads for ISS segment of the mission.

[Salo]

Gerst: SpaceX will determine root cause, NASA will evaluate if enough backup is available before approaching ISS.

Todd Halvorson: confused about pods... is it 2 or 4 or ? that are operating? and how many are needed to actually get to ISS?

Gerst: The other two got recovered WHILE we are in the con, so we are now at 4.

E: pressure was one issue, all tanks are now at nominal pressure but we have not enabled 2 and 3 thrusters yet.. plan to enable them soon. Right now only 1 and 4 enabled

Suff: Just got a note showing that SpaceX recovered the other two quads.

                         Musk: Nominal pressure on all four tanks, but #2 and 3 thrusters not enabled yet.

[Ну-и-ну]

Т.е. пока не включили 2-й и 3-й блоки. Но оптимистично в целом.

[Yutani]

Для SpaceX эта миссия будет полезным уроком.

[Salo]

On departure ops:

Constricted around the 15th.

Great question to Elon about charging the thrusters post-sep, but PAO cut off before Elon could answer. Blah.

Next operation on station to protect is March 15. Potential berthing conflict.

[Salo]

Elon Musk: "Dragon able to be in orbit for several months in theory"

И в этой фразе  весь Маск!

[Salo]

Mike (spaceflight now?) - How long can the Dragon loiter before it has to come home, and what is the cargo/contract situation

E - Dragon can be on orbit for several months in theory, but we would not, however we may keep it for as much as month... we plan to do the perigee raise burn quite soon. Contractually, if we don't get cargo there and cargo back we only receive partial payment.

Jason: are there contingency plans for a faillure once the vehicle is in the safe zone.

Suff: we will not allow the vehicle in and will not waive it, unless we are convinced the system is healthy and redundancy required is present.

Jason" but what if something happens once inside??? what then? what continegency plan

Suff: with 3, you can still back away if one fails. with 4, you can lose one and keep approaching. we have plans for every failure mode you can imagine,

Q: worse case, if no delivery, what adjustments, what problems what impacts to ISS if the delviery doesn't happen

Suff: we are healthy relative to supply and capacity, we lose (if Dragon doesn't show) is research hardware... but we have stuff to keep the astros busy til September... the significance of the loss is the type of research we planned, some specific stuff we wanted to do.... vehicle and crew are not at risk if we miss this delivery.

AP: can you rendezvous on Sun or Mon, and were you dismayed?

E - we will not be rushing things, we will make sure first and foremost we will make things safe. Of course we were a bit alarmed, but the F9 is "perfect"... some press confused rocket with spacecraft.... we noticed the issue with the thrusters after sep.                      

Suff: What we lose if dragon doesn't show up is research hardware. Have specific research on this Dragon flight that will have to go on a repeat flight.                      

                         Musk: Noticed thruster problem after separation. Oxidizer pressure in 3 of 4 tanks was low.                      
                                                                                                                                              
Potential first opportunity is Sunday.                      

on was asked what were the implications if crewed flight.                                                                                                                                                                    

                         Elon:
We're not actually planning on having solar panels on crewed dragon. We're just going to have a very large battery.