Author Topic: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion  (Read 237821 times)

Offline mlindner

  • Software Engineer
  • Senior Member
  • *****
  • Posts: 2717
  • Space Capitalist
  • Silicon Valley, CA
  • Liked: 1866
  • Likes Given: 675
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #400 on: 09/22/2022 09:38 pm »
I bet it helps reduce risk of a spin prime test blowing up the rocket. Might help a bit reducing engine fires and stuff/

You'd want a gas displacement system for such cases, even a good industrial fan would be sufficient. And again, you'd want it near the base of the tower as the cryogenic boiloff would be cold and settle to the ground.
« Last Edit: 09/22/2022 09:39 pm by mlindner »

Offline AC in NC

  • Senior Member
  • *****
  • Posts: 2472
  • Raleigh NC
  • Liked: 3597
  • Likes Given: 1918
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #401 on: 09/23/2022 01:20 am »
Itís not an exaggeration to say SpaceX moves about 10 times faster than NASA.
I've had a different notion lately.  Seems to me like at every point w.r.t. SLS the decisions almost invariably conspire to prevent any chance of a meaningful launch cadence including the nominal one they actually "commit" to (if you can call that meaningful).
« Last Edit: 09/23/2022 01:25 am by AC in NC »

Offline baking

  • Full Member
  • ****
  • Posts: 563
  • Boston
  • Liked: 489
  • Likes Given: 110
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #402 on: 09/23/2022 02:00 am »
Sealing over the "Pez dispenser" door on Ship 24 implies their may some design change coming in the future and testing an old design might unnecessarily risk Ship 24 prematurely.  Is there any evidence of such a design change to the door?  Or did they just decide to test the door an a later ship?

Offline daavery

  • Full Member
  • **
  • Posts: 204
  • denver CO
  • Liked: 267
  • Likes Given: 103
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #403 on: 09/23/2022 02:25 am »
I've seen a few people saying that this is some kind of "fire supression system". That's not going to be the case. Any fire supression system would not be high up in the air near the top of the tower. It'd be at the base of the tower and cover surfaces in water and possibly fill up space with gasses (though that'd be hard to get to work in the outdoors).


we call it fire suppression because that's what Spacex labels it as:

https://twitter.com/CSI_Starbase/status/1572977333967159296

Online StevenOBrien

  • Full Member
  • ****
  • Posts: 983
  • Ireland
  • Liked: 3680
  • Likes Given: 1989
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #404 on: 09/23/2022 07:22 am »
Hey, that looks familiar

Offline baking

  • Full Member
  • ****
  • Posts: 563
  • Boston
  • Liked: 489
  • Likes Given: 110
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #405 on: 09/23/2022 01:17 pm »
Hey, that looks familiar
So we're watching them watching us watching them?

Offline scaesare

  • Member
  • Posts: 4
  • Liked: 7
  • Likes Given: 11
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #406 on: 09/23/2022 04:51 pm »
I bet it helps reduce risk of a spin prime test blowing up the rocket. Might help a bit reducing engine fires and stuff/

You'd want a gas displacement system for such cases, even a good industrial fan would be sufficient. And again, you'd want it near the base of the tower as the cryogenic boiloff would be cold and settle to the ground.

Preferably a fan with a brushless motor that doesn't spark :)

Offline mlindner

  • Software Engineer
  • Senior Member
  • *****
  • Posts: 2717
  • Space Capitalist
  • Silicon Valley, CA
  • Liked: 1866
  • Likes Given: 675
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #407 on: 09/23/2022 06:14 pm »
I've seen a few people saying that this is some kind of "fire supression system". That's not going to be the case. Any fire supression system would not be high up in the air near the top of the tower. It'd be at the base of the tower and cover surfaces in water and possibly fill up space with gasses (though that'd be hard to get to work in the outdoors).


we call it fire suppression because that's what Spacex labels it as:

https://twitter.com/CSI_Starbase/status/1572977333967159296

It's not clear where that label was posted. It's easy to mistake a piece of pipework for one thing when it's actually another.

Online FutureSpaceTourist

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 30638
  • UK
    • Plan 28
  • Liked: 55110
  • Likes Given: 24281
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #408 on: 09/26/2022 03:36 pm »
https://twitter.com/csi_starbase/status/1574421047985725442

Quote
Hey #StarshipAddicts, take a close look at this picture and see if you can figure out which Raptors fired during the 7 engine Static Fire test.

Offline Robotbeat

  • Senior Member
  • *****
  • Posts: 36058
  • Minnesota
  • Liked: 20395
  • Likes Given: 10572
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #409 on: 09/26/2022 03:39 pm »
https://twitter.com/csi_starbase/status/1574421047985725442

Quote
Hey #StarshipAddicts, take a close look at this picture and see if you can figure out which Raptors fired during the 7 engine Static Fire test.
This is really annoying.
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Offline Vultur

  • Full Member
  • ****
  • Posts: 1800
  • Liked: 653
  • Likes Given: 151
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #410 on: 09/26/2022 05:04 pm »
So what's the next step? Rollout of B8 or B9?

Offline Barry Brisco

  • Member
  • Posts: 40
  • Liked: 31
  • Likes Given: 9
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #411 on: 09/26/2022 05:27 pm »
B8 is now out at the launch site for testing. B7 is back in the Mega Bay.

Offline Vultur

  • Full Member
  • ****
  • Posts: 1800
  • Liked: 653
  • Likes Given: 151
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #412 on: 09/26/2022 05:36 pm »
Oops. Thank you. Don't know how I missed that.

I'm kind of surprised there was no test notice for today, then.
« Last Edit: 09/26/2022 05:37 pm by Vultur »

Offline alugobi

  • Full Member
  • ****
  • Posts: 670
  • Liked: 714
  • Likes Given: 0
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #413 on: 09/26/2022 07:17 pm »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.

Online marsbase

  • Full Member
  • ****
  • Posts: 409
  • North Carolina
  • Liked: 454
  • Likes Given: 69
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #414 on: 09/26/2022 07:21 pm »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.
"Looks like the cryo test stand rolling to the launch site right now."  This is from 9/19. No photo provided.
https://forum.nasaspaceflight.com/index.php?topic=57219.msg2409951#msg2409951

Offline alugobi

  • Full Member
  • ****
  • Posts: 670
  • Liked: 714
  • Likes Given: 0
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #415 on: 09/26/2022 07:25 pm »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.
"Looks like the cryo test stand rolling to the launch site right now."  This is from 9/19. No photo provided.
https://forum.nasaspaceflight.com/index.php?topic=57219.msg2409951#msg2409951
Yeah, that was mine.  I was mistaken.  It wasn't a cryo stand, it was a transport stand for B7.

Edit: it was dark and the camera view was distant. 
« Last Edit: 09/26/2022 07:25 pm by alugobi »

Offline Vultur

  • Full Member
  • ****
  • Posts: 1800
  • Liked: 653
  • Likes Given: 151
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #416 on: 09/26/2022 07:40 pm »
Ah, ok, thanks!

Online MdBee

  • Member
  • Posts: 87
  • Australia
  • Liked: 205
  • Likes Given: 32
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #417 on: 09/27/2022 05:18 am »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.

Didn't B4, and B7, get cryo-proofed on the sub-orbital pad (pad A)? I recall the booster puck-shucker being installed there, which presumably will continue to happen for each new prototype. Or does that come later? I've lost track of all the various testing stages.

Online StevenOBrien

  • Full Member
  • ****
  • Posts: 983
  • Ireland
  • Liked: 3680
  • Likes Given: 1989
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #418 on: 09/27/2022 06:04 am »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.

Didn't B4, and B7, get cryo-proofed on the sub-orbital pad (pad A)? I recall the booster puck-shucker being installed there, which presumably will continue to happen for each new prototype. Or does that come later? I've lost track of all the various testing stages.
No. There's a separate cryproofing station by the launch mount. No Booster has been on Pad A since Booster 3. Ship 24 was the last vehicle to be tested on Pad A before it had engines installed.

Online robot_enthusiast

  • Full Member
  • *
  • Posts: 179
  • Ontario, Canada
  • Liked: 259
  • Likes Given: 38
Re: SpaceX Starship : Texas Prototype(s) Thread 24 : Discussion
« Reply #419 on: 09/27/2022 10:08 am »
There's no cryo stand down there.  It appears that B8 is going to be cryo proofed on the launch mount.  But the launch mount has been getting all kinds of steel plating welded all around the internal area, so nothing's going to happen until that work is done.
Have they not been doing the cryo testing directly on the transport stands? I could be mistaken, but I was under the impression that B4 and B7 were never transferred to a separate stand for their turn at the cryo station.

Tags:
 

Advertisement NovaTech
Advertisement SkyTale Software GmbH
Advertisement Northrop Grumman
Advertisement
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
1