space X test failure.
space X test failure.
(OP)
https://youtu.be/wFXQ5SRCy74
Doesn't look like buckling to me. More of a someone opened the wrong tap without opening another one first to equalise the pressure.
Doesn't look like buckling to me. More of a someone opened the wrong tap without opening another one first to equalise the pressure.
RE: space X test failure.
Also, Elon Musk commented later that it may have been caused bye a 'test configuration mistake'.
https://www.nasaspaceflight.com/2020/04/spacex-sta...
The forum section has a long thread discussing the lead-up and aftermath of the test. I'll have to peruse it thoroughly and maybe a likely cause will emerge. You have to register to access it.
Brad Waybright
It's all okay as long as it's okay.
RE: space X test failure.
https://forum.nasaspaceflight.com/index.php?topic=...
RE: space X test failure.
RE: space X test failure.
I have seen a silo with a tank in it do this before because someone started pumping the contents out without injecting N2 in at the top to maintain positive deferential tank pressure to outside.
RE: space X test failure.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: space X test failure.
From the video it was clean outside then loads of condensation and ice formed then it rapidly melted again after a period.
Do they just use liquid nitrogen or fill both tanks with fuel and oxidiser?.
RE: space X test failure.
Andries
RE: space X test failure.
RE: space X test failure.
they did an initial test with water in both tanks and were testing in cold conditions using liquid Nitrogen
Starship does not have an inter-tank since lox and liquid methane are chilled there is a common bulkhead.
it failed is the lower tank which had lost pressure due to ground equipment (is the assumption)
Scott Manly has a good video with the common speculation
also goes into detail on the welding methods
https://www.youtube.com/watch?v=XJslqGkb9So
Hydrae
RE: space X test failure.
RE: space X test failure.
So while I can see strong evidence of numerous reinforcing members in the lower tank and possibly even a double-wall, the upper tank looks completely unreinforced. Those perforated straps would have some purpose, and I can see that there a a number of them in there, but with no evidence of inherent stiffness in the straps themselves, and few points of connection to the walls, I can't picture what they're there for. Also, the surfaces inside the upper tank wall are clean of any attached members. Not even a ring stiffener!
Say what you want about this structure withstanding 1G standing vertically in gravity, my question is how this was expected to tolerate >5g under rocket thrust.
A lot was learned from the Atlas rocket program (1960's) which was the first design like this one that used (a) stainless steel balloon tanks and (b) relied on propellant pressure to stand its own weight vertically on the pad.
www.sparweb.ca
RE: space X test failure.
MJCronin
Sr. Process Engineer
RE: space X test failure.
Edited- Sorry, SparWeb, I just saw your comment about Atlas, you beat me to it.
Brad Waybright
It's all okay as long as it's okay.
RE: space X test failure.
I think this is the same link that was posted before but the content has been edited with some explanation of what went wrong.
Brad Waybright
It's all okay as long as it's okay.
RE: space X test failure.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: space X test failure.
RE: space X test failure.
With regards to the snake oil comment - Still
Could not find LMAF emoji
RE: space X test failure.
Ah, he blames software, not hardware. Elon has no sense of irony.
www.sparweb.ca
RE: space X test failure.
https://www.spacex.com/sites/spacex/files/starship...
RE: space X test failure.
RE: space X test failure.
RE: space X test failure.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: space X test failure.
I wouldn't be surprised if Musk at one of the early design meetings said he wanted some thing that would work and look cool and chucked a 1960's space comic on the desk and smiled...…
And the design team leaders just smiled straight back and said we won't have a problem selling that idea to the troops.
RE: space X test failure.
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: space X test failure.
In the Boeing culture, most of the best minds would be looking for a better job.
Somewhere that they would be valued and respected.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: space X test failure.
RE: space X test failure.
How are you guys doing inline images? I can't get either the Image or the Link or the Upload Your File function to do it.
RE: space X test failure.
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: space X test failure.
Sometimes, you need to add a ".png" to the end of the link to get it to appear correctly. At least, that is what has worked for me in the past.
For example:
is [ img https://res-1.cloudinary.com/crunchbase-production...] without the space after the first bracket.
To do the video in your above post, "[ youtube link ending]" should work (again without that initial space and only the text after the ".be/") though I don't think the start time adjustment works in that format though.
Andrew H.
www.MotoTribology.com
RE: space X test failure.
Thanks for the tip. I will try using the .png extension.
RE: space X test failure.
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: space X test failure.
That video was interesting. I particularly liked the scene at 35 minutes, where about 20 people are standing around the base of the fully-fueled V2 rocket. They can't touch it any more, can't do anything else to get it ready to launch, but it hasn't occurred to them it's TIME TO LEAVE THE AREA.
If I'd been there at that moment, I can imagine myself backing away outside the crowd and then shouting "Five, four, three..."
www.sparweb.ca
RE: space X test failure.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: space X test failure.
Maybe that says something about life in the Reich in those days :)
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: space X test failure.
I don't know about you, but I wouldn't be caught sitting out in the open with nothing between me a ballistic missile sitting on the launch pad. All it had to do was fall-over in the wrong direction right after the engine had ignited or veer off course once it was in the air.
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: space X test failure.
RE: space X test failure.
https://youtu.be/0Cbqsu4yYMI
RE: space X test failure.
RE: space X test failure.
https://youtu.be/Cp2oaguCzN8
RE: space X test failure.
There are 3 combustion chambers in the raptor engine
fuel rich ,oxidizer rich, and main chamber
My guess they did not light the main chamber until they know the pre-burners are running fine
Hydrae