Dragon Post-Mission Press Conference
Charles Bolden, NASA Administrator
Julie Robinson, International Space Station Program scientist
Elon Musk, SpaceX CEO and Chief Designer and CEO, SpaceX
Gwynne Shotwell, SpaceX President and COO
- We’re really pleased at working together that SpaceX and NASA teams were able to berth at station and return safely
- Importance of the commercial cargo program and how critical it is for the ISS program
- Orbital Sciences is other COTS partner – set for a test flight of Antares rocket in April
- Three successful missions in three months –
- First operational mission with Dragon trunk – grapple bars
- A number of technological demonstrations on this mission
- Dragon back in port in Long Beach last night at about 7 p.m.
- All systems remain powered and NASA received all critical cargo
- Returned 3,256 lbs. of cargo – 200 lbs. more than originally planned
- Had an issue with Dragon spacecraft briefly
- Slight issue with propellant test valve
- Fixed within four or five hours
- No further issues after that point
- We don’t expect to see that issue again
- Over 200 scientific investigations ongoing on ISS
- Variety of different types of experiments
- 300 tubes of blood – studying interaction between nutrition and bone loss — applications for osteoporosis treatment
- Experiment looking at alloy mixtures – launched on Dragon and returned
- Agriculture education, commercial activities
- Samples are on the ground, researchers are beginning to look at them
Q. When is next CRS launch?
Shotwell: CRS 3 launch late this fall. A number of upgrades to the Dragon configuration that will enable better critical cargo to be sent and returned.
Musk: Will include upgraded Falcon 9. Could increase the useful payload of Dragon by several tons. As much as you could pack into Dragon.
Will attempt to recover the first stage.
“As I said before, I think it will take us several flights before we are successful in that.”
Q. Fairing test status at NASA Plum Brook?
Musk: NASA Plum Brook is an “really, epic super cool” facility
Prepping to do separation tests. Will be releasing information on it in the next few weeks.
Q. Are you optimistic about Orbital Sciences tests going on as scheduled?
Q. When will Dragon be ready for human spaceflight and are they still on track for 2015?
Musk: “Things seem to be going very well.” Hitting milestones and hope to do pad abort tests later this year. “It’s coming along really well.” Partnership with NASA is going very well.
Bolden: All of our partners are making very good progress and making their milestones under CCiCAP agreements. The partners are also involved in developing certification process and showing they meet the requirements that are laid out.
NASA is the long pole in the tent. Hope to put out an RFP next spring with down select for providers in Fall 2014. Depends upon how generous Congress is with funding the program.
Q. What was the problem with the thrusters on Dragon?
Musk: There was a “very tiny change” to three of the check valves on the oxidizer tank. Different from the previous ones that flew, and they got stuck. Was able to write some new software in real time that was uploaded with Dragon to increase pressure upstream from check valve and release it. The spacecraft version of the Heimlich maneuver. Once they got unstuck, they worked very well.
Had difficulty communicating with the spacecraft because it was drifting. Worked with the Air Force to get higher powered dishes to communicate with Dragon and upload the software.
Q. How will sequestration affect commercial crew?
Bolden: As we projected, sequestration has a detrimental impact on the commercial crew program by reducing the amount of money available for partners. Don’t see an impact for the rest of this fiscal year (ends September 30), but it will have an impact down the road unless NASA gets more funding.
Q. What is long-term solution for Dragon thruster problem?
Musk: The software uploaded was to get the valve unstuck. We need to fix this tiny little issue with the valve, reverting it to was it used to be. Will do some checks to make sure it doesn’t happen again.
Q. What is strategy on booster recover?
Musk: Initial recovery test will be a water landing. First stage continue in ballistic arc and execute a velocity reduction burn before it enters atmosphere to lessen impact. Right before splashdown, will light up the engine again. Emphasizes that we don’t expect success in the first several attempts. Hopefully next year with more experience and data, we should be able to return the first stage to the launch site and do a propulsion landing on land using legs.
Q. Is there a flight identified for return to launch site of the booster?
Musk: No. Will probably be the middle of next year.
Q. What are long term effects of sequestration?
Bolden: We don’t see an impact for the rest of 2013 calendar year because we ended up with more money than expected in commercial crew. Already discussing delays in commercial crew milestones with partners. Sequestration is a 10-year program that was never supposed to be executed.
Q. What was Bolden’s reaction to SpaceX’s solution to the propulsion problem?
Bolden: Incredible to watch their young, energetic team work through the propulsion anomaly.
Musk: SpaceX and NASA teams are deeply integrated and working closely with each other. It’s great to work with NASA. NASA was so cool, I was far more anxious than NASA was. We have one cool customer.
Q. On the check valve problem, you characterized it as a tiny issue. Was it a manufacturing or a configuration question?
Musk: It was a tiny design revision change from the supplier. The supplier made some mistakes and we didn’t catch those mistakes. Ran system through low pressurization tests, but didn’t run them through the high presssurization functionality tests. Didn’t get stuck in the low pressurization functionality tests. Make sure we don’t repeat that in the future. Need a magnifying glass to see the difference.
Q. How is upgraded Falcon 9 different from the current version?
Musk: Next version is a meaningful upgrade. Has 60 to 70 percent more capability. Improved redundancy, structure, engines, avionics, etc. This version is designed to allow first stage to land propulsively back at the landing site. Will take at least a year to get that right.
Shotwell: Performance changes are more than rocket changes, but translate into an improvement for scientific community. Can bring up more powered cargo, refrigerators, etc.
Musk: Dragon version 2 will be a significant upgrade, with the capability to land propulsively on land. Water landings will become a thing of the past. Will allow for missions at a faster tempo.
Q. Can you provide more details on Dragon Version 2?
Musk: Significant upgrades, powerful side mounted thruster pods. Quite big windows for astronauts to see outside. Landing legs that pop out of the bottom. It look like kind of a real alien spaceship. Started with landing on water because it was the easiest thing to do and we didn’t really know what we were doing. Didn’t want to take any unnecessary risks. Now want to push the envelope on the technology.
Plan to unveil Dragon Version 2 later this year.
Shotwell: Thanks all the SpaceXers for all the hard work they put in. Thanks NASA as both a partner and customer, extraordinary relationship with them. Thanks the Air Force, FAA and FCC.
Robinson: A real consolidation between commercial transport and the use of ISS for commercial research. All these things are going hand in hand, and they’re bringing results back to the U.S. economy.