this post was submitted on 12 Jun 2023
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Starship Development Thread #46B (sh.itjust.works)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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SpaceX Starship page

FAQ

  1. When (first) orbital flight? First integrated flight test occurred April 20, 2023. "The vehicle cleared the pad and beach as Starship climbed to an apogee of ~39 km over the Gulf of Mexico – the highest of any Starship to-date. The vehicle experienced multiple engines out during the flight test, lost altitude, and began to tumble. The flight termination system was commanded on both the booster and ship."
  2. Where can I find streams of the launch? SpaceX Full Livestream. NASASpaceFlight Channel. Lab Padre Channel. Everyday Astronaut Channel.
  3. What's happening next? SpaceX has assessed damage to Stage 0 and is implementing fixes and changes including a water deluge/pad protection/"shower head" system. No major repairs to key structures appear to be necessary.
  4. When is the next flight test? Just after flight, Elon stated they "Learned a lot for next test launch in a few months." On April 29, he reiterated this estimate in a Twitter Spaces Q&A (summarized here), saying "I'm glad to report that the pad damage is actually quite small," should "be repaired quickly," and "From a pad standpoint, we are probably ready to launch in 6 to 8 weeks." Requalifying the flight termination system (FTS) and the FAA post-incident review will likely require the longest time to complete. Musk reiterated the timeline on May 26, stating "Major launchpad upgrades should be complete in about a month, then another month of rocket testing on pad, then flight 2 of Starship."
  5. Why no flame diverter/flame trench below the OLM? Musk tweeted on April 21: "3 months ago, we started building a massive water-cooled, steel plate to go under the launch mount. Wasn’t ready in time & we wrongly thought, based on static fire data, that Fondag would make it through 1 launch." Regarding a trench, note that the Starship on the OLM sits 2.5x higher off the ground than the Saturn V sat above the base of its flame trench, and the OLM has 6 exits vs. 2 on the Saturn V trench.

Quick Links

RAPTOR ROOST | LAB CAM | SAPPHIRE CAM | SENTINEL CAM | ROVER CAM | ROVER 2.0 CAM | PLEX CAM | NSF STARBASE

Relevant Reddit threads (though these likely won't be accessible during the blackout).

Starship Dev 46 | Starship Dev 45 | Starship Dev 44 | Starship Dev 43 | Starship Thread List

Official Starship Update | r/SpaceX Update Thread

Status

Road Closures

No road closures currently scheduled

No transportation delays currently scheduled

Up to date as of 2023-07-09

Resources

I'll attempt to keep this post current with links and major updates, but would be greatly helped by information supplied by the community. I hope this can be an alternate place to discuss Starship development. While the Starship Development Threads on Reddit are not party threads, Lemmy is still small enough that I don't imagine that strict moderation will be needed in the short term.

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[–] pigeonberry 2 points 1 year ago

ArsTechnica article summarizing Musk's Twitter Spaces talk: "SpaceX making more than 1,000 changes to next Starship rocket by Stephen Clark" Single quotes are from the article; double quotes are Musk.

  • Hot staging. "Obviously, that results in kind of blasting the booster, so you've got to protect the top of the boost stage from getting incinerated by the upper stage engines." He expects 10% more tonnage to orbit. 'SpaceX is adding an extension to the top of the Super Heavy booster with vents to allow super-hot gas from the upper stage engines to safely flow out of the rocket’s structure “and not just blow itself up,” Musk said. “This is the most risky thing, I think, for the next flight.”'
  • "So I think the probability of this next flight working, getting to orbit, is much higher than the last one. Maybe it's like 60 percent. It depends on how well we do at stage separation."
  • 'SpaceX teams are modifying manifolds on the Raptor engines that direct hot methane-rich gas toward each engine’s combustion chamber for mixing with oxygen-rich gas. The previous design was susceptible to leaks, where the hot gas could seep through bolt holes used to attach the manifold to the engine. Engineers will introduce an improved manifold design and add more torque to bolts to address the concern about leakage of super-heated gas.'
  • Engine hydraulic steering system changing to electric thrust vectoring, as previously announced.
  • Stronger shielding around each engine.
  • Pad changes with lots more concrete, rebar, and the steel plates. "gigantic upside-down shower head".
  • Faster off the pad.
  • Did not discuss the flight termination system. On flight test 1, it was more like a flight if you don't mind ending when you feel like getting around to it but please don't let me be a bother about it system.
  • When? "There are a lot of variables here that are outside of our control". Like the FAA being satisfied with the flight termination system, supra.