Home Forums Chat Forum Single-track’s space, rockets and astronauts thread

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  • Single-track’s space, rockets and astronauts thread
  • eddiebaby
    Free Member

    Blimey!

    sharkbait
    Free Member

    It was only a very short test after all, 2 down in what, about 3 seconds, is a little concerning.

    [pedant] One engine was disabled by technicians before the firing so 1 failure is more accurate [/pedant]

    HarryTuttle
    Full Member

    [Even more pedant] the ‘failure’ was an engine that automaticly shut down, I’m not aware that the reason is public. It wouldn’t surprise me at all if the software had different modes such that in flight more risks would be taken to keep an engine running if it meant the difference between sucsess and failure of the launch. IE, just because it shut down in a test doesn’t definitly mean it wouldn’t have functioned in a launch.

    sharkbait
    Free Member

    True.  The word ‘failure’ implies a big bang whereas the [internal?] software probably saw data outside prescribed limits so shut the engine down – of course that doesn’t mean it wouldn’t have gone bang if it was allowed to carry on running.

    Which bring me to an interesting question: I wonder if each engine runs it’s own on-board software and do they then communicate with central flight computers on board, or are all the engines managed by a central on-board computer system

    i.e. would the central computer shut down an engine if it wouldn’t impact on the overall flight, but keep it running if shutting it down meant the flight would fail?

    Hmmm.

    neilnevill
    Free Member

    Very true. It may have only lasted a few seconds but it was a very successful test.

    thepurist
    Full Member

    Dumb question about launches – you’re essentially firing a small fast moving object (your spacecraft) into and through an environment where there are lots of other small fast moving objects (every satellite and other object that’s in orbit). Is there sone sort of global space control that you have to submit your flight path to so they can check you’re not going to hit something (that they know about), or do they rely on the fact that space is actually pretty big so the chances of two relatively small things hitting each other is very low. Likewise if you want to park something in orbit do you have to book a slot or is it a free for all, with each control room looking out for itself?

    neilnevill
    Free Member

    Good question! NASA do track stuff, everything from satellite to debris I think, if it’s big enough to see then they track it. I believe certain orbits are getting pretty congested, not afaik it’s a free for all and there’s no intentional space controlate that issues permits. I’ve got a lovely image of an astronaut inspector checking permits on satellites and issuing tickets now 🤣

    1
    kennyp
    Free Member

    I like reading about the old stuff – Beyond is an absolute belter,

    Totally agree. Very well written book and a fascinating tale.

    2
    natrix
    Free Member

    space

    1
    neilnevill
    Free Member

    Ahha! The purist I found an answer by chance! 4 mins in, seems space X got a big fine for not providing the data to prove a falcon launch wouldn’t hit something

    Also send starship isn’t going anywhere in march. Booooo!

    retrorick
    Full Member

    Relativity rocket launch in 38 minuteshttps://www.youtube.com/live/9Tv6pbDCmLk?feature=share

    retrorick
    Full Member

    Relativity rocket launch

    Another attempt on the hour.

    neilnevill
    Free Member

    https://www.bbc.co.uk/news/science-environment-64965767.amp

    I’m sure I saw a ‘How do they do that?’episode on this the other day

    Northwind
    Full Member

    neilnevill
    Free Member

    What do people think of space X trying to catch a returning starship on the pad with the ‘chop sticks’ or arms? It must be harder than landing on legs on a flat pad.

    Harder, yep but it’s mass on the ground vs in the rocket so that makes a huge difference. Basically this is saying that landing and reusing is pretty much a solved problem, so they can stop trying to make it easy.

    There’s some other benefits- you don’t have a rocket firing at the landing pad from minimum range reducing damage and heat stress, and backwash onto the vehicle, which is going to be really useful for floating platforms since usually the solution is “just use a shit-ton of concrete” And once you can land a rocket at a precise speed on the X, that’s not so very different from hovering it near to the grabber arm, especially since the arm could in later versions move, and be higher up. So things like gimballing the arm so that rather than needing calm seas or massive levels of stabilisation, you can have the platform move and the arm compensate.

    neilnevill
    Free Member

    Yes I agree northwind, it makes sense.

    Virgin could be bust before they’ve got to orbit, hope not.

    https://news.sky.com/story/virgin-orbit-halts-operations-with-almost-all-staff-set-to-be-furloughed-12835084

    simondbarnes
    Full Member

    This is one of the best images I’ve seen of the sun. Stunning! I would love a print of it.

    Fusion of Helios

    neilnevill
    Free Member

    Wow.

    Spacex could be looking at a star ship orbital attempt April 20th, ish.

    thols2
    Full Member

    Very impressive CV, surely deserved a better Photoshop job than this.

    3
    dannybgoode
    Full Member

    It was I that originally posted the shuttle land vid. I’ve watched it a few times now and it still entertains.

    For me I have a Saturn V obessesion. I don’t think it’ll even be beaten as just the Goat rocket taking into account the tech available to them at the time. The computers etc are just astonishing and the problems that they had to solve to get the whole thing together were not insignificant.

    And then of course ask the launch footage is off the scale for what a rocket launch should look like 🙂

    I am not nearly as excited by modern rockets as such but some of the payloads grab my attention.

    neilnevill
    Free Member

    It seems that the virgin rocket company is laying off most of its staff. Oh dear.

    I’m still following various YouTube channels for spacex news. It seems they are busily working on the orbital launch mount and seeking FAA clearance for super heavy to try and reach orbit. A rocket of such magnitude, completely reusable, taking 150 tonnes to LEO, will be something to see!

    neilnevill
    Free Member

    I’m reading that starship is ready for an orbital launch now, once faa give approval. I’m looking forward to that.

    Nasa announced the crew for artemis 2, but since that is still 18-19 months away I’m not so interested currently. It will be utterly awesome when it happens yes, but its just there’s not much to see for a while!

    Northwind
    Full Member

    It’s sad about virgin, that was a promising idea I thought. People seem keen to shit on Branson over it though. It’s always amazing how thin the margins between success and failure can be, spacex was literally saved from bankruptcy by a single succesful launch, virgin it seems could easily have been the same.

    neilnevill
    Free Member

    Nasa announced the crew for artemis 2, but since that is still 18-19 months away I’m not so interested currently.

    Is it not 18 months to the first cancelled launch? I look forward to it flying in about 3 years

    sharkbait
    Free Member

    See my separate PSA…

    neilnevill
    Free Member

    Ooh you cynical northy! Let’s hope not.

    Starship is go! Faa approval granted! Launch could be as early as Monday!
    https://www.bbc.co.uk/news/science-environment-55564448

    neilnevill
    Free Member

    Lots of details on what we hope will happen released by spacex and explained by Marcus House here https://youtu.be/d_udrhg1jrM

    CountZero
    Full Member

    Someone referred to the Hubble Ultra-deep image, which took twenty days to gather the date to produce that image. JWST has just revisited that patch of sky, and taken a twenty hour scan…

    https://bigthink.com/starts-with-a-bang/jwst-surpasses-hubbles-deepest-image/

    futonrivercrossing
    Free Member

    New starship launch on Thursday 2.30 pm

    neilnevill
    Free Member

    Oh. 4/20 chief twit’s favoured marajuna related date.

    Well I’m looking forward to it anyway.

    sharkbait
    Free Member

    Bollocks…. I may be busy 😫

    neilnevill
    Free Member

    The launch will take place from southern Texas between 8.28am local time (2.28pm in the UK) and 9.30am (3.30pm in the UK), on Thursday.

    beamers
    Full Member

    The launch will take place from southern Texas between 8.28am local time (2.28pm in the UK) and 9.30am (3.30pm in the UK), on Thursday.

    Live stream up and running: Linky

    multi21
    Free Member

    beamers

    Live stream up and running: Linky

    Thanks for the link, but what a couple of **** those presenters are. “It’s called superheavy because it’s super and it’s heavy”

    beamers
    Full Member

    Yep. Heatshield tiles. “Curved ones go on the curved bits of the rocket, flat ones on the flat bits.”

    It’s not rocket science. Oh, hang on….

    multi21
    Free Member

    Hmmm, looks like it’s lost a few engines

    tjagain
    Full Member

    I have been loving various youtube vids of the mars rovers.  I find that just incredible.

    neilnevill
    Free Member

    Lost a bit more!

    multi21
    Free Member

    So looks like it actually lost 6 engines, 1 possibly relit though.

    Some of the debris videos are quite impressive/alarming 😮

    neilnevill
    Free Member

    holy cow!

    beamers
    Full Member

    I wonder what the other side of that Dodge Grand Caravan looks like?

    CountZero
    Full Member

    **** a duck! Christ, you’d have thought they might give the area a once-over with a broom before they lit the blue touch-paper!

    Pretty much trashed all the kit in the foreground, I wonder what the camera filming was in, to survive that? Didn’t suffer a rapid unexpected disassembly, at any rate… 🤣

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