this post was submitted on 10 Aug 2023
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Starship Development Thread #48 (self.spacex)
submitted 1 year ago* (last edited 1 year ago) by threelonmusketeers to c/spacex
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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.

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Starship Dev 47 | Starship Dev 46 | Starship Dev 45 | Starship Dev 44

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Status

Road Closures

Type Start (UTC) End (UTC) Status
Primary 2023-08-24 13:00:00 2023-08-25 01:00:00 Cancelled
Alternative 2023-08-25 14:00:00 2023-08-26 02:00:00 Concluded
Alternative 2023-08-28 13:00:00 2023-08-27 01:00:00 Cancelled

Up to date as of 2023-09-05

Vehicle Status

As of 2023-09-05

Follow Ring Watchers on Twitter and Discord for more.

Ship Location Status Comment
S20 Rocket Garden Retired
S24 Gulf of Mexico Destroyed Destroyed on during Flight Test 1
S25 Stacked on B9 Spin Prime and Static Fire
S26 Rocket Garden Cryo tested
S27 Rocket Garden Scrapped Common dome imploded
S28 Engine Install Stand Raptors installed Previously tested at Masseys
S29 High Bay Under construction Flap installation in progress
S30 High Bay Under construction
S31 High Bay Under construction
S32 Build Site Parts spotted
S33 Build Site Parts spotted
S34 Build Site Parts spotted

 

Booster Location Status Comment
Pre-B7 & B8 Scrapped or Retired B4 is in the Rocket Garden, the rest are scrapped.
B7 Gulf of Mexico Destroyed Destroyed April 20th in Flight Test 1
B9 Launch mount Hot-stage ring installed Static fire (August 5th)
B10 Megabay 1 Cryo tested
B11 Rocket Garden Resting
B12 Megabay 1 Grid fins installed
B13 Build Site Parts under construction
B14 Build Site Parts under construction
B15 Build Site Parts under construction

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[–] [email protected] 5 points 1 year ago* (last edited 1 year ago)

Zack Golden @CSI_Starbase (Nitter link) Sep 2, 2023 · 3:45 AM UTC has a multi-post speculation about Super Heavy testing at Boca Chica.

I am now 95% confident that SpaceX is in the process of building not one, but two Super Heavy Static Fire Test stands. One will be located near the Suborbital tank farm, and the other will be at the Massey's test site.

These test stands are essentially mini versions of the Orbital Launch Mount. There are a few major differences though:

  1. These stands will not have launch capability so they will be much simpler....
  1. Because of the location of these test stands, and severe limitations on space, the method of testing engines will have to be different than how its done on the OLM. [flame trenches]

Why?

  1. Well at some point, launches will become much more frequent. This means the OLM will be nearly always be busy preparing for the next launch....
  1. The Orbital Launch Mount, with its new Bidet system is limited to Static fire tests of less than 10 seconds. It is truly designed for Launching Full stacks, and not for long duration tests purely due to the volume of water stored in the tanks.
  1. The OLM is also believed to be limited to Static Fire tests with thrust values at or around 50%. This is a result of the design of the hold down clamps. Also, the skirt of the booster is likely not designed for the kind of forces it would experience if it was being held down at max thrust....

So if this speculation is true, what should we be on the lookout for?

  1. The areas where these will be located will either be built up to accommodate a flame trench, or they will soon begin excavating large holes into the ground for this purpose.
  1. The suborbital tank farm will likely need to be expanded in order to increase its LOX and CH4 storage capabilities. I believe SpaceX is already in the beginning stages of this massive renovation.
  1. CH4 storage tanks will need to be added to the Massey's test site. They will also need additional GSE equipment for filling Booster COPV's. This includes Helium storage, CO2 for the engine skirt purge system.
  1. There will likely also need to be additional water tanks installed for traditional deluge systems for both of these tests stands....

He says he'd do a video if he weren't already in the middle of two deep-dives.

u/Alvian_11 in The Other Place says that a "flame diverter/ramp" is different from a "flame trench" and that a flame diverter/ramp makes much more sense.