• Zipitydew
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    2 months ago

    NASA update a few weeks back said all 27 thrusters passed multiple hot fire simulations of the return mission. That overall things looked fine. And they still felt safety factor of riding home on Dragon was better.

    Kinda neat that there are multiple options now. NASA mission leaders felt the same a while back. Even if Starliner seems fine to come home why take even that slight bit of risk.

    • BastingChemina@slrpnk.net
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      2 months ago

      This is not what I’ve read.

      Boeing engineers tested the thrusters and managed to replicate the issue. They found that there issue was caused by a bulging of a Teflon valve.

      However they don’t understand the root cause of why the Teflon is bulging.

      So Boeing said it’s safe for the astronauts to return on Starliner but they also said that they fixed the thruster issues they had on the previous flight.

      Not all NASA is confident that the Starliner is safe enough.

      • frezik@midwest.social
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        2 months ago

        IIRC, the whole thing is a bit of misconception in the popular imagination. It’ll reenter just fine if it manages the right maneuvers. The risk is hitting the ISS on the way out.

        • catloaf@lemm.ee
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          2 months ago

          And actually making those maneuvers. If the seals bulge again and disable a thruster, they might be unable to control their flight.

          • Zipitydew
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            2 months ago

            The 1 thruster experiencing that worst case isn’t needed. The 27 others all tested high 90% range through multiple hot fires a couple weeks back.