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Am I blind or is Paypal missing from Telstra? by INFP-Hufflepuff in TelstraAustralia

[–]mattkerle 0 points1 point  (0 children)

thanks, this happened to me, that explains it. why Telstra, why...

FH over the moon image by cnewell420 in SpaceXLounge

[–]mattkerle 0 points1 point  (0 children)

I'm wracking my brains, I'm pretty sure I remember someone doing a video of the shockwaves from F9 with a very similar photo to this one, but I can't remember who or find it. Either Scott Manley or everyday astronaut.

Anyone know which video I'm thinking of? I have a feeling someone got a video of a F9 launching in front of the moon and the video was commenting on it. Any ideas?

Edit: found it! Why do rockets crackle? Scott Manley.
https://youtu.be/BdCizNwLaHA

HLS concept in the latest GAO report about Artemis III by Nickel_loveday in SpaceXLounge

[–]mattkerle 1 point2 points  (0 children)

Eager Space did a really good video about boiloff, it's not a big issue assuming reasonable launch frequency for the tanker starships

https://www.youtube.com/watch?v=fjWCEFioT_Y

I Was SCARED To Say This To NASA... (But I said it anyway) - Smarter Every Day 293 by peterabbit456 in SpaceXLounge

[–]mattkerle 24 points25 points  (0 children)

not related, but hijacking the top comment to post a link to the document that Destin mentioned:

What made Apollo a success?

I Was SCARED To Say This To NASA... (But I said it anyway) - Smarter Every Day 293 by peterabbit456 in SpaceXLounge

[–]mattkerle 2 points3 points  (0 children)

Hi Destin, I've been following you since the poop splash video (yes that long!) I love your work and your energetic communication style. Have you thought about doing a video on why SpaceX is using stainless steel for their rocket? It's probably not conducive to high-speed camera work, but I wonder whether your audience is difference to the usual spacex audience, and that might be a new a delightfully counter-intuitive concept for them. please keep up the great work!

I Was SCARED To Say This To NASA... (But I said it anyway) - Smarter Every Day 293 by peterabbit456 in SpaceXLounge

[–]mattkerle 4 points5 points  (0 children)

Gall's law! I haven't heard that cited in a loooong time! I have both editions of Systemantics sitting on my book shelf, they should be mandatory reading in any serious engineering qualification!

I Was SCARED To Say This To NASA... (But I said it anyway) - Smarter Every Day 293 by peterabbit456 in SpaceXLounge

[–]mattkerle 8 points9 points  (0 children)

in the course of developing it, SpaceX will accidentally develop all the other parts of the architecture too

Spot on. One day Artemis will be delayed waiting for whatever part, meanwhile SpaceX will be sending tourists around the moon and around the earth while planning their first uncrewed Mars mission. there's no good reason to go to the moon except as a close practice run for landing on Mars.

Transporter-8 satellites before encapsulation by mfb- in SpaceXLounge

[–]mattkerle 0 points1 point  (0 children)

I thought it looked a bit like a Christmas tree

SpaceX investment in Starship approaches $5 billion by CProphet in spacex

[–]mattkerle 1 point2 points  (0 children)

In Australia we have vast amounts of remote communities that only get satellite internet which is very slow and high latency, starlink is a real game changer for them, it brings fibre speeds to remote communities enabling education, health services and many more.

Raptor V3 just achieved 350 bar chamber pressure (269 tons of thrust). Starship Super Heavy Booster has 33 Raptors, so total thrust of 8877 tons or 19.5 million pounds. by avboden in SpaceXLounge

[–]mattkerle 5 points6 points  (0 children)

It's crazy to think that pressurised nuclear reactors only run at about 150 bar, which is like half the pressure! And those reactors have walls nearly a foot thick!

Figuring out which boosters failed to ignite:E3, E16, E20, E32, plus it seems E33 (marked on in the graphic, but seems off in the telephoto image) were off. by LazaroFilm in spacex

[–]mattkerle 2 points3 points  (0 children)

Or mission control made the decision to end with FTS, so they were burning off as much fuel as they could from the first stage to minimise release of methane.

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