Articles around SpinLaunch seem to be popping up lately which is a bit odd considering it's been ~2 years since they've done any testing and I've haven't seen any actual new announcements in these new articles yet.

Looks like a liquid-fuel rocket engine? Wow. That's got to be one heck of a hydraulic hammer when it hits 10,000g.

What kind of rocket engine have they designed that could survive this? Obviously it's not going to be a conventional turbopump; those things have micron tolerances, no way those could withstand 10,000g and still work. Probably they're doing some kind of pressure-fed engine (the fuel tanks held at high pressure, probably by compressed helium). They don't seem to publicly answer these questions, anywhere on their website? That's credibility-hurting.

There've been rocket engines built in the past that can survive low 100's of g's, at least. Those were exotic solid-fuel designs, intended as air-defense missiles.

https://en.wikipedia.org/wiki/Sprint_(missile)

It's also just so much less dramatic visually compared to a rocket launch. It just feels anticlimactic. Still cool and interesting none-the-less.

I the 2022 test flights that the article mentions would have been from their smaller, vertical-throwing suborbital prototype. Last I saw they had kind of gone silent since 2023. The news page on their website [https://www.spinlaunch.com/in-the-news] hasn't posted any updates in almost a year.

I assume means they haven't successfully scaled up to the orbital launcher yet. Perhaps they're having trouble securing funding. Perhaps they're having trouble working out some engineering problems or securing a site for the facility. Or maybe things are just taking time. I'm guessing, though, that this is a situation where no news is definitely not good news.