Unrolled tweet thread at threadreaderapp.com by Ryan Hansen Space @RyanHansenSpace. It’s a look at the details of the steel plate parts and assembly under the Orbital Launch Mount.

Much lifting and lowering and all sorts of craney stuff, but it’s believed that all the manifolds are in place by now. A nice Imgur picture of a manifold being craned.

New comment from /u/santacfan on Reddit:

Starbase live-

11:56pm- 2nd manifold is lifted off it’s stand (Who needs sleep anyways)

12:12am- Manifold is going up after some weight was added to balance the load

12:14:40am- Starts to swing over

12:18am- Lowering. This should go to the left of the plate installed earlier

12:23am- Trying to get it aligned

12:25am- Starting to bring it in closer to the OLM

12:31am- Lowered a bit more. (Looks like they’re at the 10ft mark where they paused for quite a while earlier. So I’m off to bed)

12:45am- Lowered into place.

1:21am- Raised again

1:50am- B10 turns into Massey’s

2:01am- Manifold is lowered again

2:20am- Manifold go up, Basket go down

2:25am- Manifold goes down

2:36am- Basket goes up

2:59am- Basket goes down

3:35am- Small crane swings what may have been the 3rd manifold into place under the OLM

3:51am- Grover moves a piece of small diameter pipe over to the left side of the OLM where the excavators are working

5:30am- LR11000 is disconnected from the manifold section

8:10am- Day shift off to a slow start

9:25am- White pipe is lifted by a small crane over by the berm. RGV’s pictures show that they might be running a new water line from the current vertical tank over to the OLM.

9:32am- LR11000 lifts the counterweight that was used to keep the last manifold level during the lift

11:04am- Basket goes up

11:21am- Retaining wall goes up where they’ve been excavating

11:24am- Basket goes down

11:36am- 2 workers carry a plastic pipe over to the pit being dug by the long reach excavator (if it’s metal, enter those guys in a body building competition)

11:55am- 2 dump truck loads of gravel dumped on the other side of the excavator

12:00pm- Nic is leaving NSF

12:53pm- Basket goes up

1:06pm- Basket goes down

1:24pm- Grover lifts a couple pieces of metal off of the top of the OLM

1:40pm- LR11000 moves another counterweight away from the OLM

2:11pm- LR11000 lifts another counterweight

2:17pm- Small crane lifts a piece of metal out of the excavation pit

2:53pm- In todays adventure of what’s stuck at Starbase. We have a small bulldozer hanging off the side of a low boy trailer.

2:53:54- Random kid says hi

2:58pm- The excavator wins again. Bulldozer is on the trailer.

3:34pm- Grover moves what looks like a long straight piece of rebar over to the cryo pit area

3:49pm- Grover lifts a triangular piece of metal to the top of the OLM.

4:13pm- Grover lifts another triangular piece of metal to the top of the OLM.

4:30pm- Grover lifts more rebar over for the cryo pit lid

4:50pm- Basket goes up (to the door on the side of the OLM)

5:02pm- Rocket cows hack the stream

5:03pm- Basket goes down

5:37pm- Basket goes up

5:44pm- Basket goes down

6:32pm- LR11000 picks up a deluge pipe

6:51pm- Grover swings out of the way

6:57pm- LR11000 Starts swinging deluge pipe over. Straight pipe with a curve on the end closest to the OLM.

6:59pm- Starts lowering pipe to the back left side OLM

7:47pm- Small crane lifts a short piece of pipe next to the bigger piece the LR11000 lifted over

7:51pm- Short piece swung back away

9:00pm- Looks like some work on the lid for the cryo pipe vault. Some people going in and out of the ring around the OLM. They’re hiding what we really want to see behind the tarps though.

9:15pm- LR11000 moves to pick up Y pipe

9:41pm- Lifting straps connected to the crane

9:56pm- Y pipe lifted

9:58pm- Swung around the OLM

10:06pm- Lowered to just above the OLM

10:08pm- Guide rope got stuck on smaller crane. Had to go back up.

10:09pm- Going back down

10:12pm- Sat on the ground right outside the pit.

10:14pm- Lifted Up slightly and rotated

10:15pm- Lowered into the pit

10:25pm- For those wanting to keep track, In Ryan’s renders, we’ve seen the bottom pipe that goes to the middle manifold and the Y section that goes over it lifted in so far. There should be 2 short pieces next to connect the Y to the other 2 manifolds.

(This gets synced)

“SpaceX launched the most powerful rocket ever built. Its impact is still felt in this Texas community”, a CNN article dated Friday, 7 July 2023.

Musk has repeatedly said he’d like to try to launch Starship again as soon as this summer, but the FAA said in a statement to CNN that SpaceX has yet to take public safety actions or submit a mishap report with corrective actions for FAA review and approval.

Should we now be creating thread #47?

#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.

Thread 47

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

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

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.

Looks like the Ship Quick-Disconnect is back!

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:

Fewer Letters	More Letters
FAA	Federal Aviation Administration
FTS	Flight Termination System
LOX	Liquid Oxygen
MECO	Main Engine Cut-Off
~	MainEngineCutOff podcast
N1	Raketa Nositel-1, Soviet super-heavy-lift (“Russian Saturn V”)
NSF	NasaSpaceFlight forum
~	National Science Foundation
OLM	Orbital Launch Mount
QD	Quick-Disconnect
SPMT	Self-Propelled Mobile Transporter

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX
cryogenic	Very low temperature fluid; materials that would be gaseous at room temperature/pressure
~	(In re: rocket fuel) Often synonymous with hydrolox
hydrolox	Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer
iron waffle	Compact “waffle-iron” aerodynamic control surface, acts as a wing without needing to be as large; also, “grid fin”
ullage motor	Small rocket motor that fires to push propellant to the bottom of the tank, when in zero-g

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[Thread #0 for this sub, first seen 15th Jun 2023, 07:42] [FAQ] [Full list] [Contact] [Source code]

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.

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”.

More pour info, this time from tweets from Zack Golden @CSI_Starbase. The truck counts basically match those from @[email protected]’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.