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ISS Space

NASA Mulls SpaceX Backup Plan For Crew of Russia's Leaky Soyuz Ship (reuters.com) 61

NASA is exploring whether SpaceX's Crew Dragon spacecraft can potentially offer an alternative ride home for some crew members of the International Space Station after a Russian capsule sprang a coolant leak while docked to the orbital lab. Reuters reports: NASA and Russia's space agency, Roscosmos, are investigating the cause of a punctured coolant line on an external radiator of Russia's Soyuz MS-22 spacecraft, which is supposed to return its crew of two cosmonauts and one U.S. astronaut to Earth early next year. But the Dec. 14 leak, which emptied the Soyuz of a vital fluid used to regulate crew cabin temperatures, has derailed Russia's space station routines, with engineers in Moscow examining whether to launch another Soyuz to retrieve the three-man team that flew to ISS aboard the crippled MS-22 craft. If Russia cannot launch another Soyuz ship, or decides for some reason that doing so would be too risky, NASA is weighing another option.

"We have asked SpaceX a few questions on their capability to return additional crew members on Dragon if necessary, but that is not our prime focus at this time," NASA spokeswoman Sandra Jones said in a statement to Reuters. It was unclear what NASA specifically asked of SpaceX's Crew Dragon capabilities, such as whether the company can find a way to increase the crew capacity of the Dragon currently docked to the station, or launch an empty capsule for the crew's rescue. But the company's potential involvement in a mission led by Russia underscores the degree of precaution NASA is taking to ensure its astronauts can safely return to Earth, should one of the other contingency plans arranged by Russia fall through.

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NASA Mulls SpaceX Backup Plan For Crew of Russia's Leaky Soyuz Ship

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  • by saloomy ( 2817221 ) on Thursday December 29, 2022 @02:24AM (#63165376)
    In a Dragon Crew that it will be too heavy, and burn up as it descends? I wonder if they can adjust the entry angle to compensate for additional weight, maybe by coming in at a shallower tangent to surface. Other than that, I can't imagine why they couldn't have people crouch together to get home. The trip is what? 18 hours from undocking to landing, so supplies shouldn't be too big a concern.
    • Re: (Score:3, Informative)

      by war4peace ( 1628283 )

      It's not a truck carrying potatoes.
      It needs one chair per crew member, accelerations are pretty high, vibrations are pretty high, etc., etc.

    • Who cares?

      Big picture, you send a Dragon up with ONE crewman on board. When you get up there, the people who need to get down get on the Dragon, it lands.

      If you can't manage to rearrange people with just one Dragon, send two.

    • by necro81 ( 917438 )
      The Crew Dragon re-entry capsule weighs something like 9-10 tons. The addition of 100 kg of downmass (crew member, pressure suit, etc.) would be pretty insubstantial. (The capsule also has a 150-kg budget for downmass payload - experiments and such that are brought back to Earth - which could be trimmed back to compensate.) At most, SpaceX would need to adjust the re-entry trajectory a bit - maybe come in a bit more shallow - to reduce peak heating.

      Crew Dragon was designed for a crew capacity of four,
      • by BadgerStork ( 7656678 ) on Thursday December 29, 2022 @10:32AM (#63165822)
        The Dragon spacecraft is capable of carrying up to 7 passengers to and from Earth orbit, and beyond. It is the only spacecraft currently flying that is capable of returning significant amounts of cargo to Earth, and is the first private spacecraft to take humans to the space station.
        • by caseih ( 160668 )

          Came here to say this. For whatever reason NASA specified that the Dragon capsules contracted to go to the space station should only have four seats. However the capsule was always designed to carry seven, in two levels of seats. I don't think any of the existing crew dragon capsules have more than four seats, however, and it how easy they could add three more I don't know, if it's even possible to do at this stage..

    • When Dragon was designed, it was designed to replace the human transport capabilities of the Space Shuttle system, which was a crew size of seven. In the post-Columbia disaster era, all new proposed US crew vehicles were planned to carry seven people. After some time passed, NASA declared, keeping in mind that ISS was de-scoped (some planned modules, like the centrifuge module were not completed/launched) and "completed" by a minimal set of final shuttle flights, that it would not need to fly more than 4 pe

  • For a fraction of the price the Russians do.

  • by thomst ( 1640045 ) on Thursday December 29, 2022 @07:10AM (#63165522) Homepage

    According to Wikipedia, the SpaceX Crew Dragon, by default, is configured to carry up to four passengers [wikipedia.org], but it can be reconfigured to carry as many as seven.

    So it's clearly feasible to send one, with a pilot aboard, to return three passengers to Earth. The problem, if any, will be Russia's willingness to allow its cosmonauts to touch down in American waters, rather than on the steppes of Kazakhstan ...

    • I believe the assumption here is that since the capsule was designed for 7 people, the life support, environmental support, and other systems can safely return 7 astronauts to earth in an emergency. Even if it only has 4 seats installed. Not a bad thing to know in the event of some major catastrophic failure on the space station requiring an emergency departure, especially considering there are 7 people onboard ISS at this moment, and 3 don't have a viable way off the station.

      So they probably wanted to know

      • by jfdavis668 ( 1414919 ) on Thursday December 29, 2022 @10:15AM (#63165786)
        It's not just the seats, but compatible space suits and hook ups for oxygen, water, power and communication for the suits. This is in case of a loss of pressure during decent. Hopefully that doesn't happen, but trying is about as dangerous as using the Russian capsule that is currently there.
    • by jfdavis668 ( 1414919 ) on Thursday December 29, 2022 @10:17AM (#63165790)
      One Russian came up with the last NASA crew, and will return to the US when they leave. Same with the Russian crew, it contains one US member.
    • There's no need for a pilot, it's designed to fly and dock autonomously.

  • The generic seats not needed for the return trip could then be removed from Dragon and stored. I'm pretty sure the don't have quick disconnect fasteners, but I'm sure the cosmonauts and astronauts are all smart enough to install additional seats in a docked Dragon capsule. Even if the seats aren't a perfect fit, at least they won't have to ride home in the trunk.

  • by necro81 ( 917438 ) on Thursday December 29, 2022 @08:16AM (#63165564) Journal
    That NASA is talking to SpaceX about these contingencies should surprise no one. I would only have been surprised if NASA wasn't talking to them about this.

    What would surprise me even more was if we started talking to China about their capabilities...
    • What would surprise me even more was if we started talking to China about their capabilities...

      Somebody get Jeff Daniels on the phone.

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