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submitted 11 months ago by jeffw@lemmy.world to c/technology@lemmy.world
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[-] JohnDClay@sh.itjust.works 4 points 11 months ago* (last edited 11 months ago)

SpaceX did all the inspections for a falcon 9 booster in 9 days. No way they did a full rebuild in that time.

https://www.teslarati.com/spacex-falcon-9-new-booster-turnaround-record-21-days/

[-] drdabbles@lemmy.world -2 points 11 months ago

Yeeeah, so, you didn't read your own link I guess? Because it says, on a Tesla simp blog, that it was a refurbishment. Not an inspection.

Here's a nice write-up from NASA on what the SRB refurb process was. Feel free to read it.

https://llis.nasa.gov/lesson/836

[-] JohnDClay@sh.itjust.works 3 points 11 months ago

Again, I'm not trying to say these words have a single defined meaning. I'm saying that SpaceX's reusable rockets are in a different category compared to SRBs. Call those reusable and refurbishable if you like, or call them anything else. I just use the reusable refurbishable terminology because that's what everyday astronaut uses.

Do you know the turn around time on an srb? I couldn't find it in your doc or in the wiki.

[-] drdabbles@lemmy.world -5 points 11 months ago

The only difference is propulsive landing. You're obviously attempting to backpedal here, and it's not working. SpaceX also refurbishes their units, you're just bullshitting at this point. It's painfully transparent.

[-] JohnDClay@sh.itjust.works 2 points 11 months ago

NASA stopped refurbishing their SRBs because it costs more to do so. SpaceX is able to drastically lower it's launch costs because of the immense savings they can realize by a quick turnaround for reuse. That's the difference.

[-] drdabbles@lemmy.world -1 points 11 months ago

Russia has drastically lower launch costs than SpaceX. Justify it now.

[-] JohnDClay@sh.itjust.works 2 points 11 months ago

Mind giving your source? I found 2.5k/kg for falcon 9 vs 5k/kg for soyuz. The shtil is as far as I can tell military surplus and is now retired, so it's costs aren't really reflective of long term usage.

https://georgetownsecuritystudiesreview.org/2023/04/20/t-minus-6-seconds-starship-and-humanitys-next-major-step-into-space/

https://marspedia.org/Financial_effort_estimation

this post was submitted on 18 Nov 2023
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