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Starship Flight 7

(www.spacex.com)
649 points chinathrow | 1 comments | 16 Jan 25 21:25 UTC | HN request time: 0s | source
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terramex ◴[16 Jan 25 23:04 UTC] No.42732041[source]▶
Looks like second stage broke up over Caribbean, videos of the debris (as seen from ground):

https://x.com/deankolson87/status/1880026759133032662?t=HdHF...

https://x.com/realcamtem/status/1880026604472266800

https://x.com/adavenport354/status/1880026262254809115

Moment of the breakup:

https://www.instagram.com/reel/DE52_hVSeQz/

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dpifke ◴[17 Jan 25 01:58 UTC] No.42733260[source]▶
Preliminary indication is that we had an oxygen/fuel leak in the cavity above the ship engine firewall that was large enough to build pressure in excess of the vent capacity.

Apart from obviously double-checking for leaks, we will add fire suppression to that volume and probably increase vent area. Nothing so far suggests pushing next launch past next month.

https://x.com/elonmusk/status/1880060983734858130

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coldtea[dead post] ◴[17 Jan 25 05:06 UTC] No.42734284[source]▶
[flagged]
pmontra ◴[17 Jan 25 08:35 UTC] No.42735302[source]▶
Test flights.

My tests keep failing until I fix all of my code, then we deploy to production. If code fails in production than that's a problem.

We could say that rockets are not code. A test run of a Spaceship surely cost much more than a test run of any software on my laptop but tests are still tests. They are very likely to fail and there are things to learn from their failures.

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notorandit ◴[17 Jan 25 11:15 UTC] No.42736351[source]▶
Running a code test doesn't require firing a rocket.

How would you test a rocket?

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TypingOutBugs ◴[17 Jan 25 12:30 UTC] No.42736838[source]▶
You test components in isolation, you test integration of components, you run simulations of the entire rocket, and finally you test the rocket launch.

You’ll catch issues along the way, but you can’t catch all of them before a full launch test. That’s why there are launch tests.

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1. notorandit ◴[17 Jan 25 16:54 UTC] No.42740196[source]▶
This can get as far as the test plan is complete, multiply iterated under different interface conditions and thorough. And you are still relying upon the adherence of the simulated models to the physical reality.

Real tests do all of this at once with no option to escape reality.

Again, one thing is automating thorough software tests, another one is testing physical stuff.