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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 05 Mar 2021, 22:52 
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Cool footage from SN10's flight

[youtube]https://youtu.be/dkXUS321oZ4[/youtube]


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 05:35 
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Did they run out of water on the one deck gun or did they know it was going to go boom and shut off the water?


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 11:11 
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Username Protected wrote:
Cool footage from SN10's flight

[youtube]https://youtu.be/dkXUS321oZ4[/youtube]


Anyone else see this and think of the "Adama Maneuver"?


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 11:20 
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Did they run out of water on the one deck gun or did they know it was going to go boom and shut off the water?


Its still a possibility that it was a commanded detonation.

Either that, or when 3 of the 6 landing gear didn't lock and landed hard, it caused a crack in the fuel tank, which eventually failed.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 13:13 
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- Why did the SpaceX Starship SN10 explode?
https://space.stackexchange.com/questio ... 10-explode

[youtube]https://youtu.be/LPBhaq8cLB0[/youtube]

Reason for Explosion
https://www.youtube.com/watch?v=LPBhaq8cLB0&t=500s
Quote:
Seemingly, the oxygen tank ruptured; According to Scott Manley, the oxygen tank was under pressure and it ruptured before any fire started which might have triggered the explosion

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 22:19 
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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 06 Mar 2021, 23:51 
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It was not a commanded detonation. Leaving out the “why” factor, the “flight termination system” is.installed externally at about the point where the lower methane tank and upper LOX tank meet. It’s much higher than the point of the explosion that we saw, which was inside the skirt at the bottom of the rocket.

They didn’t run out of water, my guess is that they stopped spraying when the visible flames were extinguished and they thought it was out.

Lastly, I hate to speak contrary to Scott Manley, but I think he mis-spoke. While I agree that the explosion may have been the result of damage caused by the hard landing, the lower tank is the methane fuel tank, not oxygen. I agree that was what likely failed, but it was leaking methane, not oxygen.

Lastly, if you watch the video closely you will see that there was a pretty good fire burning in about that location from the time the second Raptor was shut down until the fire suppression system “put it out”. It’s very possible that there was a fuel valve on that engine that didn’t close and kept dumping methane out of the nozzle. If they actually extinguished the fire but the valve was still open, methane could easily have accumulated under the skirt until it met with the right fuel:air mixture and a heat source.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 07 Mar 2021, 23:10 
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Willis, Jon, and John - Thank you so much for the information and the links to the videos! It's amazing what someone with a few Billion to spare can do when they hire the right folks and figure how to make that philanthropy/hobby/side gig profitable.


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 09 Mar 2021, 21:29 
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RIP SN10. Can't wait for the next one!

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 09 Mar 2021, 22:29 
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Eleven is already on the pad.

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 10 Mar 2021, 23:49 
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The hard landing, fire, explosion and the Law of Unintended Consequences.

https://www.engadget.com/sn-10-starship ... 17155.html

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 11 Mar 2021, 08:18 
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Wow, 10 meters/second is 2000 feet/minute. No wonder it bounced!

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 12 Mar 2021, 10:22 
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Lastly, I hate to speak contrary to Scott Manley, but I think he mis-spoke. While I agree that the explosion may have been the result of damage caused by the hard landing, the lower tank is the methane fuel tank, not oxygen. I agree that was what likely failed, but it was leaking methane, not oxygen.

Lastly, if you watch the video closely you will see that there was a pretty good fire burning in about that location from the time the second Raptor was shut down until the fire suppression system “put it out”. It’s very possible that there was a fuel valve on that engine that didn’t close and kept dumping methane out of the nozzle. If they actually extinguished the fire but the valve was still open, methane could easily have accumulated under the skirt until it met with the right fuel:air mixture and a heat source.

I have to make a correction. Sorry all. My information on the location of the propellant and oxidizer tanks was incorrect, the LOX is on the bottom and the liquid Methane is above it. I'm not sure how I got crossed up but I was 180 degrees off.

This is what I get for contradicting Scott Manley. :doh:

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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 29 Mar 2021, 15:12 
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Meanwhile, SN11 should have flown today but the FAA didn't bother to turn up. Not sure why it can't fly without a pencil-pusher there, but that's the government for you.

Next attempt tomorrow, if the FAA decide to show up.


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 Post subject: Re: Starship SN-10 - Landed Okay-ish, then the KABOOM
PostPosted: 30 Mar 2021, 12:57 
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SN11 exploded when they attempted to relight the engines at 1 km AGL.

[youtube]https://youtu.be/kcMSwXo94g4[/youtube]

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