Topic: Interesting stuff about SpaceX Starship (hate the name)  (Read 10206 times)

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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #140 on: March 27, 2021, 09:29:25 am »
Back to Monday again. 
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Offline d4v1ks

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #141 on: March 27, 2021, 11:12:22 am »
Back to Monday again.

I imagine if they cancelled it because of the weather alone.
It was a very foggy day.
But the static fire, despite brief, looked fine.
Probably they are just being cautious, as they already had 2 failures in a row.
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #142 on: March 27, 2021, 12:06:09 pm »
I haven't seen the static fire but the last video I saw was very foggy so I thought that was the reason for the cancellation too.  I'm sure they want all around clear video of the landing. 

I'm hoping for a perfect landing (or at least close). If the landing gear bend a little leaving the ship tilted but upright and no explosion I'll be very pleased and I suspect Musk will too. 

What comes next will be interesting whether it is SN15 or BN1. 

I doubt that they will make the July orbital mission unless it is just a booster that isn't expected to land.  Alternately barely orbital with a Starship unable to land.  But I would love to be wrong and have a full orbital mission of Starship deploying Starlink satellites en masse at any time in July.  It would be a real wake up call to the "competition".

 
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #143 on: March 27, 2021, 09:03:28 pm »
It looks like they are building fuel storage tanks using the same components as for the Starship/SH. I wonder if the results of the SN7.2 fuel tank with the 3mm material was good enough that they are going ahead with it for future Starship/SH construction and someone said "What are we going to do with all this 4mm material we have on hand"? and have Musk (or someone) say "Build our tank farm out of it damn it!"

They also finally installed the crane in the High Bay.  No more taking the roof off and using extensions on their movable crane to stack SH. 
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #144 on: April 01, 2021, 04:34:21 am »
SN11 blew up just after the beginning of the landing burn.  R.I.P.  Cause unknown.  Two possibilities are 1/ a breach in the tanks allowed mixing of methane and LOX leading to the explosion 2/ The auto destruct activated when telemetry failed.  My option would be 3/ the header tank at midships using heated propellant to maintain pressure had an "over pressure event" and blew leading to the whole tank-age going too. 

BN1 is already considered obsolete and is scheduled for scrapping.  BN2?  If it survives early testing might reach orbit.

SN15 is nearly ready to be sent to the launch pad.   Could be soon. 
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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #145 on: April 02, 2021, 04:30:21 pm »
My option would be 3/ the header tank at midships using heated propellant to maintain pressure had an "over pressure event" and blew leading to the whole tank-age going too. 

I'm starting to see discussion now of the possibility that this is the actual cause.  No confirmation but discussion when I hadn't seen any such idea before posting it here.  :woot:
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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #146 on: April 05, 2021, 02:22:00 pm »
From Elon Musk:
Quote
"A (relatively) small CH4 leak led to fire on engine 2 & fried part of avionics, causing hard start attempting landing burn in CH4 turbopump."

Now what exactly constitutes a hard start and why that caused the explosion still needs explanation.  I don't think this rules out my idea.  But we'll have to wait for more info.
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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #147 on: April 07, 2021, 04:19:12 am »
Looks likely that SN15 will move to the launch pad Friday and maybe pressure testing and static fire for Monday and Tuesday.  Not that long before some form of launch. 
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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #148 on: April 09, 2021, 04:29:57 am »
I was pessimistic it was done on Thursday.  (SN15 moved to the launch pad)

Interesting, a thrust puck for super heavy has been seen at Boca Chica with holes for the full load of Raptors.  Maybe for BN2 or BN3 I don't know.  Something like 34 Raptors are being shipped to Boca Chica as well, enought for a fully stacked orbital Starship/Super heavy combo.  Wonder if Musk really does expect an orbital launch by July even if he can't land either part. 

Interesting times. 

Also saw that there are 2 serious contenders to starting building a commercial space station within 2 years and a wannabe that may be a bit of a long shot but possible.  One of those plans to NOT use SpaceX for anything. 

I'd like to see SpaceX buy Bigelow and use Starship to send up modules bigger than anything anyone else can send.  Even if they have to use Dragons to deliver the personnel. 

There was a April Fools video with Bezos claiming to have bought NASA to destroy SpaceX and Tesla.  ;) 

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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #149 on: April 09, 2021, 07:53:00 pm »
I just recalled that the "wannabe" for a space station plans to "harvest" 2nd stages abandoned in orbit to make into station modules.  Now if this would work what company is better positioned to do so than SpaceX?  Even prototype starships that they know they can't land from orbital speed would make HUGE modules for a station once you empty the fuel tanks and remodel them for habitation and equipment. 
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #150 on: Yesterday at 12:31:45 am »
From Elon Musk:
Quote
"A (relatively) small CH4 leak led to fire on engine 2 & fried part of avionics, causing hard start attempting landing burn in CH4 turbopump."

Now what exactly constitutes a hard start and why that caused the explosion still needs explanation.  I don't think this rules out my idea.  But we'll have to wait for more info.

I have seen statements that a hard start causes a pressure surge which would be compatible with the idea of the re-pressurization system blowing one or both of the header tanks.
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Seti Team    Free Software
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Offline Nemesis

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Re: Interesting stuff about SpaceX Starship (hate the name)
« Reply #151 on: Yesterday at 01:29:08 am »
Interesting, a thrust puck for super heavy has been seen at Boca Chica with holes for the full load of Raptors.  Maybe for BN2 or BN3 I don't know. 

Also a thrust puck with placements for 3 vacuum raptors in addition to the gimballed 3 standard raptors.   Made I presume for an orbital Starship. 
Do unto others as Frey has done unto you.
Seti Team    Free Software
I believe truth and principle do matter. If you have to sacrifice them to get the results you want, then the results aren't worth it.
 FoaS_XC : "Take great pains to distinguish a criticism vs. an attack. A person reading a post should never be able to confuse the two."