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.

  • pigeonberry@lemmy.worldEnglish
    3·
    1 year ago

    #To repeat, new pinned thread:

    Thread 47

    As @clothes on lemmy.world pointed out: for some reason, via lemmy.world, this 46B thread is still pinned and there’s no sign of 47.

  • verity_kindle@lemmy.worldEnglish
    2·
    11 months ago

    This is the finest FAQ in the fediverse. I come back to it, just to appreciate just how much data you fit in it, so easily accessible and concise for the experienced and inexperienced alike. It makes up for so many poorly written, ugly, inhuman FAQs across the years.

  • LettuceTurnipTheBeet@lemm.eeEnglish
    1·
    1 year ago

    RGV Sneak Peek shows some nice shots of the steel plates, as well as the pour under the OLM. Looks like a lot more concrete is needed though, wonder when that’ll happen.

    The steel plates look ready for transport, so I bet this next pour will be soon — it seems to be the main hold up.

  • pigeonberry@lemmy.worldEnglish
    1·
    2 years ago

    SpaceX @SpaceX on Twitter

    Ship 25 completes a six-engine static fire test at Starbase in Texas

    11 seconds. In the audio, only a little bit of HONK at the end.

    Someone pointed out that the flames start out as a triangle, but then switch rotated 60 degrees when the vacuum engines start - V to ^.

    A comment in The Other Place mentioned that it looks like a little spalled concrete at 4 seconds in.

    In a later tweet, Musk called it a “Key milestone completed for flight 2”.

  • pigeonberry@lemmy.worldEnglish
    1·
    2 years ago

    John Kraus @johnkrausphotos:

    In a Twitter Space with @ashleevance, @elonmusk shares that Starship will hot-stage during the next flight, lighting engines on the ship with some engines still running on the booster, as to Never Stop Thrusting!™️

    “Hot staging” is firing the upper stage engines while it’s still nominally attached to the lower stage (like resting on or loosely attached). The advantages that I gather exist: It’s fast. It takes care of stage separation without needing springs or little rockets or a flip or anything. Before firing a liquid-fueled stage that may have gases in a tank (“ullage”), you have to settle the contents so that the engine intakes suck only liquid (maybe using “ullage rockets”), but if you’re still accelerating at separation, that’s automatically taken care of.

    But if you intend to reuse the first stage, well, I wonder whether six engines igniting will be too hard on it.

    Apparently U.S. Titan rockets, a lot of Soviet / Russian ones (Soyuz, Progress, N-1), and (some?) Chinese Long March rockets were designed with hot staging.

    Joe Barnard @joebarnard replies: "‘okay so when I hot stage it’s “an anomaly” and I’ve “torched another flight computer” but when SpaceX does it it’s fine???’

    Edit: There’s now an article up at SpaceNews, “SpaceX changing Starship stage separation ahead of next launch”, which includes

    “We made sort of a late-breaking change that’s really quite significant to the way that stage separation works,” Musk said, describing the switch to hot staging. “There’s a meaningful payload-to-orbit advantage with hot-staging that is conservatively about a 10% increase.”…

    Musk said that, for Starship, most of the 33 Raptor engines on the Super Heavy booster would be turned off, but a few still firing, when the engines on the Starship upper stage are ignited. Doing so, he said, avoids the loss of thrust during traditional stage separation, where the lower stage shuts down first.

    Doing so requires some modifications to the Super Heavy booster. Musk said SpaceX is working on an extension to the top of the booster “that is almost all vents” to allow the exhaust from the upper stage to escape while still attached to the booster. SpaceX will also add shielding to the top of the booster to protect it from the exhaust.

    “This is the most risky thing, I think, for the next flight,” he said of the new stage separation technique.

    Besides the change in stage separation, Musk said SpaceX made a “tremendous number” of other changes to the vehicle, “well over a thousand.” He didn’t go into details about the changes, …

    SpaceX also made improvements to the Raptor engines, with Musk describing the vehicle launching in April as using a “hodgepodge” of engines built over time. The Raptors on the new vehicles include changes to the hot gas manifold in the engine to reduce fuel leakage.

    Those changes, he said, gave him more confidence in the success of the next launch. “I think the probability this next flight working, getting to orbit, is much higher than the last one. Maybe it’s like 60%.” In an online conversation in late April, he estimated a “better than 50% chance” of success on the next launch.

    In another note, Musk finally learned some caution!

    Musk, asked about any plans for a Starlink IPO, declined to comment. “It would not be legal for me to speculate about a Starlink IPO,” he claimed. “I think it’s against regulations to talk with any kinds of specifics about a future public offering.”

    Edit: Peter Hague PhD @peterrhague: Thus far Musk estimates $2-3bn invested by SpaceX so far in Starship. The price of a single SLS launch

    • John_Hasler@lemmy.oneEnglish
      1·
      2 years ago

      Hot staging also eliminates the gravity loss that otherwise would occur during the coasting phase during and after separation.

      They may ignite only three engines at half thrust for the first second or so.

      • few@sh.itjust.worksMEnglish
        1·
        2 years ago

        At stage separation how horizontal is Starship? If there was no vertical moment then how significant would the gravity loss actually be?

        AFAIK most of the gravity loss is in the first few second of a launch but I don’t have any idea what you are losing by the time you get to stage separation.

    • subtle_inquisitor@aussie.zoneEnglish
      1·
      2 years ago

      Interesting, most of the Soviet rockets that uses hot staging had a truss between each stage to allow the exhaust to vent. As far as I know starship doesn’t have anything like this yet, I wonder if they’ll add some or if they’re just gonna see what happens without it 😂

    • LettuceTurnipTheBeet@lemm.eeEnglish
      1·
      1 year ago

      I’m really impressed by how quickly the plate is getting assembled. I didn’t expect the manifolds to get added for another week or so, and now they’re at 2 / 3.

      I’m not sure what the bottleneck is at the moment. Once everything is lifted in place they can move B9 over, but they might want to wait until they hit stage adapter is added.

      B9 could go through spin prime tests without the plane being ready, and the plate can get tested without all deluge water & gas tanks present. We’re also it sure how far along the other OLM repairs are (cryo pipes are still being replaced). So there’s a ton of stuff happening in parallel.

      • John_Hasler@lemmy.oneEnglish
        1·
        1 year ago

        Musk said that he thought that FAA approval of a new FTS design was likely to be the long pole.

  • mars2033@sh.itjust.worksEnglish
    1·
    2 years ago

    Ship 25 completed a flight-like chill and spin of the Raptor engine pumps, stopping just before engine ignition. As a result of the test, cryogenic liquid oxygen formed a visible cloud beneath the ship. This checked out vital systems in advance of the upcoming static fire.

    source

  • pigeonberry@lemmy.worldEnglish
    1·
    1 year ago

    More pour info, this time from tweets from Zack Golden @CSI_Starbase. The truck counts basically match those from @LettuceTurnipTheBeet@lemm.ee’s post earlier.

    SpaceX has received their final load of concrete for today’s Orbital Launch Mount foundation work. Here are the totals after the 15.3 hour marathon:

    June 25th - 132 Truck loads

    July 3rd - 171 Truck loads

    Total Volume = 2,302 m^3 = 3030 yd^3

    Total Weight = 5,411 Tons

    For reference, a Fully loaded Starship ~ 5,000 Tons

    Note: There were 4 additional trucks that showed up but were turned back around without offloading.

    Shoutout to agents @VickiCocks15 and @SpmtTracker for keeping track of all these.

    4:11 PM · Jul 3, 2023

    and

    Obviously this number is significantly greater than we predicted. For those who asked, that previous number was not considering the area in yellow, which were also completed today. This area is technically outside of the true foundation of the OLM

    with a picture by RGV Aerial Photography.

  • roomey@sh.itjust.worksEnglish
    1·
    2 years ago

    This is great thank you, I started following spacex Reddit in the echologic (was that his name?) Days, but the sub got a bit, I dunno, it started to lack a certain something. Just got too big maybe.

    I’m happy to see this here! Thanks for starting it, sorry for the off topic 😂

  • pigeonberry@lemmy.worldEnglish
    1·
    1 year ago

    So the big news of the day and night was what is believed to be the center plate of the water deluge system. It is thought that it will be placed directly under the Orbital Launch Mount.

    @LettuceTurnipTheBeet@lemm.ee already posted (at top level) “CSI Starbase video on new Deluge system”, a deep dive part 1. The URL I see for the post is https://lemmy.world/post/879748 , because that’s how I access this. The canonical one is https://lemm.ee/post/530280 .

    CSI Starbase SPMT Tracker @SpmtTracker posted a tweet with a picture of what is very likely to be a vertical stand for the center plate. The image is on Imgur. The tweet is here. Ryan Hansen Space @RyanHansenSpace tweeted a rendering of how it might look under the OLM. This should be the image:

    @LettuceTurnipTheBeet@lemm.ee posted below (if sorted by new) a link to a 13-minute video by Starship Gazer, of people working in the tent on the center plate. https://lemm.ee/comment/534238 . Someone commented that, from 4 minutes on, it’s comedy gold. People were grinning around them. I’m told that someone is standing on top of the cheater pipe at one point.

    NASASpaceflight posted a video of the rollout of the center. It’s about 1 hour 26 minutes long. The stand / jig was on the first truck; the center plate with some people on it was on the next truck. The clearest views are about 17 minutes on.

    • LettuceTurnipTheBeet@lemm.eeEnglish
      1·
      1 year ago

      Thanks for your updates @pigeonberry@lemmy.world. I know our community here is small so I’m glad some of us keep putting in the effort :)

      • pigeonberry@lemmy.worldEnglish
        1·
        1 year ago

        Same to you, bud! I figure I’ll keep blowing on the embers. Either the flame will catch (& I get to boast “I was into Lemmy before it really took off”), or my lungs will get too tired.

  • SantacFan@sh.itjust.worksEnglish
    1·
    2 years ago

    Starbase live-

    9:15am cdt- 11 more loads of rebar have been lifted over to the OLM since midnight. LR11000 still holding the deluge pipe in position to be welded.

    Edit-

    10:48am- Deluge pipe is moved to the side of the underground pipe bunker and laid down on the ground.

    11:50am- 8 more bundles of rebar have been lifted over to the OLM. Some presumably extra bent pieces have been lifted away as well.

    1:11pm- Deluge pipe raised again and moved back to join the pipe that goes underground.

    5:00pm- Since noon there has been 15 more loads of rebar craned over to the OLM. Most loads appear to be multiple pieces but there are several large bent pieces that have been moved one at a time.

    9:00pm- 10 more loads of rebar have been moved over. (44 for the day so far and 56 in the last 40 hours)