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Starship Flight 5: Launch and booster catch [video]

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Re: Starship Flight 5: Launch and booster catch [video]

#631

People on earth are experiencing the Jetsons and the Flinstones at the same time

This is what makes it bittersweet. So many comments here talking about this being progress for 'humanity'. I may be cynical, but most of humanity will get no benefit from any of these accomplishments. This is technology owned by and ultimately in service of a minuscule fraction of humanity.

Re: Starship Flight 5: Launch and booster catch [video]

#632

[flagged]

If SpaceX is overly hindered by regulation/lawfare, then there'll be competition from China before long.

I don't think so; there remain few economic reasons to go to space and spacex's customer isn't going to rely on a Chinese company.

Re: Starship Flight 5: Launch and booster catch [video]

#633

I'm just so happy to see this level of progress. This another big step for opening up space. To think that one day this will be considered normal. 150 Metric tons sent on a fully reusable rocket. Thats like a 747 to space.

This opens up immense possibilities for exploration

I’d love to see a probe catch and examine ʻOumuamua.

https://en.m.wikipedia.org/wiki/ʻOumuamua

Re: Starship Flight 5: Launch and booster catch [video]

#634

Earlier quoted context omitted.

[flagged]

It's hard to understand why people care so much about someone's personal political opinions. This is especially prevalent when working in places like Seattle and SF. People ostracizing their coworkers because of wrongthink. MDS like TDS is real. It's extremely toxic and it needs to stop. People's political beliefs are their own and connecting that to work is a recipe for disaster.

> It's hard to understand why people care so much about someone's personal political opinions.

People care because he has power and money, which he uses to shape the world in alignment with those political opinions.

The same is true of anyone else with power - Xi, Putin, Gates, Thiel, Zuck, and the countless others with influence over business and government. A lot of money is spent to analyze and alter their political opinions.

What's hard for me to understand is why this isn't plainly obvious to you.

Re: Starship Flight 5: Launch and booster catch [video]

#636
post #183

Earlier quoted context omitted.

MIMO and nonlinear control theories are probably some of the hardest topics in all of engineering. SpaceX control system also has to compensate for the fuel moving inside their rockets so the control algorithms probably involve some kind of fast numerical fluid simulation. Another interesting thing SpaceX is doing is to use consumer-grade chips in triple redundancy configurations instead of using $100,000+ radiation-…

I have been told by people who worked on them that you get radiation hardened aerospace/defence grade chips by backing off the clock speed about 20% to give signal stabilization slightly longer time. I can understand the population being confused about this but industry being confused seems to have more to do with regulatory capture and beaurocratic moats which SpaceX does seem to be bypassing.

I'm sure there are many hardening processes - from the modified COTS parts, all the way to presumably much more expensive custom substrates like: https://en.wikipedia.org/wiki/Silicon_on_sapphire

Re: Starship Flight 5: Launch and booster catch [video]

#637

The engineers at spaceX are amazing, and I'll admit I envy their tenacity and genius. The amount of progress we have seen in rocketry and space travel in the last decade is mind blowing, I never thought I would see this in my lifetime. Edit: Decided to give it a shot and applied for a backend software engineering position at SpaceX. I'm not sure if it will be noticed, but its worth a shot. I may not be a rocket scien…

We could have had this all along.

We just needed more people like Elon.

Re: Starship Flight 5: Launch and booster catch [video]

#638
post #506

[stub for offtopicness]

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Musk is just a front man. He's just an actor like Trump. God knows who is behind them. Banks, "The Matrix" , can anyone fill it in ? The front men are certainly just reading scripts, it is obvious.

Re: Starship Flight 5: Launch and booster catch [video]

#640

Earlier quoted context omitted.

I know the control algorithms are the mind-blowing part here but, does anyone have any literature about how the Rocket localized itself with respect to the chopstick arms? It must've been some combination of GPS and Radar pings to the arms? And then the onboard IMU to make sure it hits it straight.

From the control point of view, isn't this exactly the same as F9 landing on a pad, except the pad is virtual, floating in between the chopsticks and the ground? Or course one difference is that the approach needs to be from the correct direction.

I seems to remember some article mentioning the Falcon 9 using radar (+ presumably other sensors) & even having a landing site map uploaded (mainly for the return to launch site scenarios) with prioritized exclusion zones in case of a landing failure.
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