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re: SpaceX Starship Flight Test 3 | B10 crashes in Gulf, S28 burns up during reentry

Posted on 3/14/24 at 11:11 am to
Posted by SoFlaGuy
Fort Lauderdale
Member since Apr 2020
857 posts
Posted on 3/14/24 at 11:11 am to
Crazy what happens when the government gets out of the way and brilliant minds can work.
Posted by Fun Bunch
New Orleans
Member since May 2008
116401 posts
Posted on 3/14/24 at 11:14 am to
Anyone have a recap? I missed it.
Posted by Lonnie Utah
Utah!
Member since Jul 2012
24134 posts
Posted on 3/14/24 at 11:17 am to
Is space X ever gonna get one of these to fly without exploding?

I wouldn't want to be the first to ride it....
Posted by TCO
Member since Jul 2022
2545 posts
Posted on 3/14/24 at 11:20 am to
quote:

Is space X ever gonna get one of these to fly without exploding?


I don’t think you understand how test flights work. SpaceX wants any weaknesses to be exposed during test flights. That’s why the Falcon9 is so successful.
This post was edited on 3/14/24 at 11:21 am
Posted by MoarKilometers
Member since Apr 2015
18141 posts
Posted on 3/14/24 at 11:20 am to
quote:

My point is that they'll do as much as possible to paint it like it was a failure.

I'm sorry they've victimized you like that.
Posted by Lonnie Utah
Utah!
Member since Jul 2012
24134 posts
Posted on 3/14/24 at 11:30 am to
quote:

I don’t think you understand how test flights work.


I'm a scientist by training and work with the engineers on my team all the time. Model rocketry is a hobby of my son and I. We've built our own launch controllers, flight computers/data loggers (and the corresponding software) for our rockets. I understand EXACTLY how test flights work.

I'm just saying that the model of not having rockets survive test flights isn't sustainable even if you're getting "good data" back from them. Half the knuckleheads on here read my comments and think that it's some kind of political statement (it's not).
This post was edited on 3/14/24 at 11:36 am
Posted by Lsuhoohoo
Member since Sep 2007
94909 posts
Posted on 3/14/24 at 11:31 am to
I know failure is baked into the cake as a part of these test launches but I feel like it would be so deflating losing a ship after everything that went into.

Gotta break a few eggs to make an omelet and gotta lose a few billion dollar spacecrafts to make it to the moon I guess.
Posted by Pfft
Member since Jul 2014
3748 posts
Posted on 3/14/24 at 11:42 am to
Posted by Jobu93
Cypress TX
Member since Sep 2011
19246 posts
Posted on 3/14/24 at 11:44 am to
That was amazing. What a great day for SpaceX.
Posted by Lonnie Utah
Utah!
Member since Jul 2012
24134 posts
Posted on 3/14/24 at 11:48 am to
quote:

SpaceX wants any weaknesses to be exposed during test flights


The inherent problem in this line of thinking is this. Quite often, when things catastrophically fail like this, the problem arises in the very last (milli)seconds before failure. When recording test flight data, there are two ways to do it. Onboard data recording and recording data terrestrially via telemetry signals. If your vehicle catastrophically fails, more often than not, those last critical moments of the failure are not preserved on your data loggers. Either you lose your telemetric link or the device(s) recording and storing your data are destroyed.

So the optimum way to detect and diagnose failure mechanisms is to keep the vehicles intact. The best way to keep your vehicles intact is to build failure redundancy into them on the front end.
This post was edited on 3/14/24 at 11:55 am
Posted by Giantkiller
the internet.
Member since Sep 2007
20542 posts
Posted on 3/14/24 at 11:49 am to
quote:

I know failure is baked into the cake as a part of these test launches but I feel like it would be so deflating losing a ship after everything that went into.



He's got like 4 other ones they're already working on. You could see them in the broadcast.

In the Isaacson book on Elon, he says that his goal is to have thousands of them - constantly coming and going. And by the end of the book when it's set in present day, it's pretty clear that Starship has been set as a massive priority.

He DGAF about blowing them up. Every launch gets further and further. While people like Bezos and Gates are buying yachts, Elon is making commercial space flight a thing.
Posted by crazyLSUstudent
391 miles away from Tiger Stadium
Member since Mar 2012
5535 posts
Posted on 3/14/24 at 11:59 am to
quote:

I'm just saying that the model of not having rockets survive test flights isn't sustainable even if you're getting "good data" back


Yeah your budgetary limitations are not the same, as spacex has f you money and insane earning potential if they get starship working at the reliability levels of falcon
This post was edited on 3/14/24 at 12:07 pm
Posted by longtooth
Member since Jun 2013
418 posts
Posted on 3/14/24 at 12:01 pm to
Each test flight has hit significant milestones and surpasses the prior test. But, yeah, this is exactly the same as Model rocketry so I'll defer to your expertise.
Posted by jcaz
Laffy
Member since Aug 2014
15803 posts
Posted on 3/14/24 at 12:06 pm to
quote:

Any ideas on why the aborted the relight?

-Tank Pressures/Readings were not nominal, didn't wanna risk a RUD
-The spin of the vehicle could have been made worse
-The burn may have possibly given them too much of a boost and sent the trajectory beyond the exclusion zone in the Indian Ocean

I think after getting a successful demo of fuel transfer and the pez dispenser they wanted to get data from the reentry over risking a re-light.
Posted by crazyLSUstudent
391 miles away from Tiger Stadium
Member since Mar 2012
5535 posts
Posted on 3/14/24 at 12:06 pm to
Exactly lol
Posted by Lonnie Utah
Utah!
Member since Jul 2012
24134 posts
Posted on 3/14/24 at 12:08 pm to
quote:

Yeah your budgetary limitations are not the same as, as spacex has f you money and insane earning potential if they get starship working at the reliability levels of falcon


Even if my budgetary limitations were infinite, it doesn't change the engineering process behind my statements. In the event something fails, you get the best your best data and information regarding the failure back from intact vehicles. Beyond what I said about data issues, when things things explode and crash many things happen. 1). You damage the pieces you are trying to analyze when they hit the ground at high speed from high altitude. This makes it much more difficult to see what parts failed before the incident vs after an impact with the ground or other objects. 2). You don't get all of the pieces back. If the piece that failed is not recovered because it's scattered over hundreds of square miles then you never get to do all of the required failure analysis test on that equipment.

This post was edited on 3/14/24 at 12:09 pm
Posted by Puddenn32
In da LP
Member since Oct 2018
643 posts
Posted on 3/14/24 at 12:08 pm to
quote:

to build failure redundancy into them on the front end.


But if they don't know what's going to fail then how do they build in redundancies for them?

As stated he has many more starships that are produced and being produced. If a ship is recoverable and doesn't blow up, I doubt very seriously they would even try to fly these ships again with the modifications they have implemented on the new ships from the information they received after prior flights. I think he would rather them blow up to be honest.

This may be stupid thinking but thats just my take.
Posted by jcaz
Laffy
Member since Aug 2014
15803 posts
Posted on 3/14/24 at 12:09 pm to
quote:

The inherent problem in this line of thinking is this. Quite often, when things catastrophically fail like this, the problem arises in the very last (milli)seconds before failure. When recording test flight data, there are two ways to do it. Onboard data recording and recording data terrestrially via telemetry signals. If your vehicle catastrophically fails, more often than not, those last critical moments of the failure are not preserved on your data loggers. Either you lose your telemetric link or the device(s) recording and storing your data are destroyed.

All these words and you still look like a noob. Let SpaceX cook and build your little model rockets.
Posted by Lonnie Utah
Utah!
Member since Jul 2012
24134 posts
Posted on 3/14/24 at 12:09 pm to
quote:

But if they don't know what's going to fail then how do they build in redundancies for them?


By ground testing instead of flight testing. Ever been to Huntsville, Alabama?
This post was edited on 3/14/24 at 12:12 pm
Posted by Puddenn32
In da LP
Member since Oct 2018
643 posts
Posted on 3/14/24 at 12:13 pm to
how are they going to account for and understand how heat shields are going to work? They gathered countless data today on re-entry.

Also there was ice build ups on the thrusters they probably didn't account for that possibly threw off telemetry. (they wouldn't have know this without a space flight)

IDK, i just can't think that they would think of every little possibility that could go wrong without these test flights. But there again, these people are a lot smarter than I lol.
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