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YNM

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Everything posted by YNM

  1. YNM
    I'm not from the US but one of my distant relatives did move over to there for work with their family. Their water mains were burst in addition to the blackout although it has been fixed. I think there isn't much other way around preparing for something similar come next year, though. And don't forget to prepare for a hot summer, with probably many hurricanes... Here the capital city area is finally flooded, after the rest of the island and another major island. Thankfully my house isn't impacted, we normally see floods here every year.
  2. YNM
    The only thing unrealistic in that picture IMO are the strewn around objects about the pressurized habs as well as the roads. You don't need roads and paths in space, you can't walk around willy-nilly anyway. I imagine more interconnecting tubes. Still, problem remains that so far we only know how to explore with stashed supplies from homebase. If you truly want to live somewhere else you need to live off from it, and that means full self-sustain, which we haven't even reached back on Earth for things like Antarctic base stations. We'll have to figure out how to produce oxygen, food, process waste, all the lot, then how to make materials to build more stuff and what forms are they in.
  3. YNM
    What do you call FAST and Arecibo, then ? I'm not talking about building a crater dish over those craters that are visible by telescope from the Earth. Yep, for very long wavelengths the atmosphere isn't a good thing (not to mention all the noises from the Earth phenomenons), and since you need massive structures doing them free-standing in space is a challenge. Stretching a cable over the surface of the Moon should be easier...
  4. YNM
    I hope you guys have enough things to burn to heat things up or something. I have relatives over there too. But yeah, TX knows that hurricanes are a thing, but cold snaps are not something in your imagination, that's why it's so much worse.
  5. YNM
    That's *very* small. VLA with their 25 m dishes observes wavelengths at .6 to 410 cm, ALMA with their 7 m and 12 m dishes observes .032 to .36 cm. If you want to do the same with such a small dish you'd have terrible resolution and SNR, and correcting that means lots and lots of telescopes (maybe in the million range) and long integration times. Maybe as a pilot project yes, but for the penultimate mission no.
  6. YNM
    You need machinery to move them regardless. Dish structure can be made 'thinner', probably due to lower loads; but the mechanisms, if anything, I'm sure you need more dampers due to lighter mass. Unless you don't want the dishes to be moveable, in which case you're basically doing the same as the static crater thing (in which it loses squarely). We haven't quite done anything like a foldable 12 m or 25 m dish either, maybe those with nets on but that limits your minimum wavelength. Closest we've got on foldable solid thing is JWST and we haven't launched that... How big are you thinking ?
  7. YNM
    ALMA employs moveable 12 m radio telescopes that each weigh ~115 tonnes. VLA employs 25 m ones that are at least as heavy. None of these would even fit on Starship or New Glenn in one piece. I'd say throwing a net over a suitable crater is still cheaper. Also gives you a larger maximum photon gathering power. It doesn't really point anywhere much though, that's the only problem (and exacerbated by Moon's slow rotation - 29 days rather than 24 hrs), plus the receiver/collector in the middle might have to be quite beefy if you want transmission capabilities as well. Although having arrays is indeed the next step, hopefully also optical arrays.
  8. YNM
    I don't think the skycranes are really reusable, though. You need someone to refuel it (there isn't anyone there), you need someone to service/check it (there isn't any), you need it to have fuel reserve for the landing of the thing itself (which they don't need if they just smash out the crane, and extra fuel on the payload means extra fuel on the launching rocket as always). Plus given that they need the skycrane to hover on one spot is I think close enough (if not more impressive) than landing on the ground - you can autorotate (engine failure or whatever) and land a helicopter but you can't autorotate and maintain altitude. They're basically already pulling something more challenging than just directly landing there to the ground.
  9. YNM
    At least this forum existed after YouTube so finding and sharing stuff has been easier than when you have to upload it and the forum have to host it themselves... Then again YouTube is somewhat more perennial than self-hosting in many cases. It makes more sense if you sing it one syllable late...
  10. YNM
    Well, I'm talking stuff like JAXA's new H3 rocket, which from what I can tell they do have a decent amount of PR exposure put in, although it doesn't mean they show everything in the open either. Other countries might seem more secretive, albeit for some others I'm sure language barrier plays into account as well (say, ISRO). But yeah, I guess when they roll their rocket to the pad it'd still be a good news regardless of what happens then and there. (as long as we're not losing lives I guess.)
  11. YNM
    I have to ask however... is BO's development method behind the scenes are as destructive as SpX ? I mean compared to other national launcher development (which definitely stress more on every single thing going as smooth as it can without much destructive test) they barely even show tests like static engine fire, or fitting test and things like such. I even didn't realize that they're actually quite far into development for New Glenn (been in the drawing since 2012 and apparently the first BE-4 engine to be used on Vulcan is already sent) that I kinda have doubts at first that the LV is within the 2023-2025 first launch window.
  12. YNM
    welp XD lots have changed since the game started...
  13. YNM
    Who says the kerbals are thriving on oxygen ? The fuel they use is "LiquidFuel" and "Oxidizer" which can be any combination of stuff, including hypergolic fuels if they want to... and the jet engines simply use that "LiquidFuel" to burn it with whatever is in the "IntakeAir", presumably also in the "Oxidizer"...
  14. YNM

    Shower thoughts

    YNM replied to p1t1o's topic in The Lounge

    No I mean in some other countries, like owning a hill or two...
  15. YNM
    Well the front cover radome won't be as hot as the dish itself right ? Unless if you're suggesting if the icicle can also grow from the back of the dish. But yeah if you really need to from what I can see the most basic design is basically just a tent for full-covering radome.
  16. YNM
    Who says you'd spell in Latin either ?
  17. YNM
    I mean, would the icicle form if the front of the dish is a bulged-out surface rather than a curved-in parabola ? That seems to be the idea for the front-cover-only radomes... I have no winter experience so I can't tell XD
  18. YNM

    Shower thoughts

    YNM replied to p1t1o's topic in The Lounge

    I have a feeling that similar stereotypes happens elsewhere in the countryside...
  19. YNM
    I mean the guy that shown the icicles forming in the dish didn't have any motor problems apart from the icicles from the dish extending to the platform right ? Although barring that I've seen "portable radome for SATCOM" being basically just a small tent. As an interim measure you can just use a tent if you already have one ?
  20. YNM
    That only goes to say that you can burn the air there, not that it's not toxic in any form to biological life (unless if they have a radically different metabolism than what most carbon-based earth-bound life have).
  21. YNM
    Good to hear they're satisfied enough with the falling-aerodynamic data to start actually try stick the landing. When they'd land it from that position it'll be a new step of the game.
  22. YNM
    Not sure but I can only guess that in the past there weren't a lot of cameras thrown around just for wide-angle viewing. Still impressive however. A sign of the better technology available today and definitely makes it easier to confirm things on the spacecraft itself.
  23. YNM
    Or you wouldn't know them in that name but you'd still know them.
  24. YNM
    I've seen most radomes being sold as simply just covering the front as to make sure that ice build-up isn't possible geometrically rather than the whole sphere stuff. Problem is you do need to make sure the material isn't badly affecting the reception too much. If the first swarm are optimized for the US then anywhere with the same latitude in the north or the mirror latitude in the south would get it as well. Chile, Argentine, South Africa, Australia would get it.
  25. YNM
    Wikipedia shows tidal heating rate equation as well. (for roche limit.) Amount of power you need would be black-body radiation of the melting point of water (237.15 K) or brine solution (apparently the lowest you can go with NaCl is 216 K / -21 deg C) at the surface standing water radius.
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