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Everything posted by YNM
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This is why I said 8 tonnes seems to be on the small limit. Not saying it's impossible or anything, Gemini was only 7 tonnes, and Soyuz with the extra-cramped 3-seats (it does have an orbital section which isn't found on any other design) is indeed only 7 tonnes as well. If they only carry enough to supply the astronauts inside for a few hours up to half a day, and you don't go too high, maybe you can have an 8-tonne capsule + SM (retrorockets really) for maybe 4 people. It'd be interesting if we ever end up seeing cursed Neutron with Electrons strapped around it though.
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how the heck would you upgrade Energia XD (but this is for another thread, not here)
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And there's no Neutron rocket yet either, at least until 2024. We also haven't seen any progress on the capsule in public, so by the time they get to fly a human their competition would at least be about reaching that point as well. This is why I said "almost". It's not necessarily that their effort is a complete waste yet. And they need every effort possible to make sure they came first.
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I do call it lightweight. What I'm saying is that there's no reason to think that what manned spacecraft ends up on Neutron would end up being sent to BLEO missions. Problem is that everyone is now setting sights on BLEO missions, and other next-gen LEO spacecrafts promises mass launch of people... I have a feeling that Rocket Lab is almost like chasing a vanishing gap here.
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Clean-slate medium launch vehicle, about the size of an Antares (fairly larger diameter though)... Would they start to stretch it ? Put extra stuff on the side ? A curse of 12 Electrons + 1 Neutron ? 8-ton capsule gross weight sounds fairly lightweight, so I assume only private missions for 'tourism'.
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Welp, He Has Eaten The Hat. Twice.
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Problem is you do need to clean them and stuff. That's probably why most people aren't very big on them. But it is a possible alternative. With fish you also need to clean them but they're not minuscule in size. (although for anchovies we do cook them just like that.)
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I really suppose they just look at the amount of spending they're willing to put out for the ad and if the bots can't choose anything personalized they just give it to them. Most harmless ad that I have are usually if watching like machining videos etc. where it'd just be some machining tool ad which're usually not very annoying. or maybe that's exactly what they want, that's what the lobbying was for
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I think the easiest animal husbandry might be aquaculture, barring anything much more radical like lab-grown meat or such.
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totm aug 2023 What funny/interesting thing happened in your life today?
YNM replied to Ultimate Steve's topic in The Lounge
This should be somewhere in the Science ! threads, but I'm not sure if I can add anything much to the resulting topic itself. I live on the equator, air conditioning for cooling is a must even in rain season. I've read from a long time ago that there are reversible ones and I've always wondered how exactly one would reverse it, and what it would look like... Well, finally we have video explanation and evidence. -
It's only partly because of we didn't have the methods to separate them from the toxic/infectious part of the waste. Wastewater contains quite a lot of the same things in fertilizer. Back on Earth we have to treat wastewater before throwing them away because they otherwise would cause algal blooms, which thrives on the nutrient content contained in it. There's a entire field dedicated to waste reuse already.
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tbh the human population there should really close the cycle as well... Probably from waste, like I said. I do agree that we need to put in the materials in the first place (when setting up the place) but when running it in the long term there shouldn't be anymore input needed apart for expansion (energy input is mandatory). Since I don't see the latter happening a lot (at least not until everyone's settled down and can get as comfortable as back here on Earth and people from here can easily move there as easily as the 'Martians' can return) then we should pursue closed-cycle as much as possible. This is why I said that even if living on Mars is difficult there are still the ways of thinking that'd make for better living on Earth as well. So far we've relied on the uncontrolled part of nature to close the loop for us but it'd be nice if we can close the loop ourselves.
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Or from waste. The Dutch I quoted earlier does a combination aquaculture-hydroponic setting. The potato farm in that article says they only make fertilizer out of their own waste material as well. If you were concerned with lack of fat sources then aquaculture might be the easiest way out.
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If you want to sell them, that is... but it's only second to sweet potatoes in calories, so I guess it's good enough ?
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Well ECLSS need all those things too. You need air ducts, blowers, potable water pipes, waste water pipes, the whole lot. Adding some more for hydroponic isn't that drastic of an increase in requirements, esp. if it means spaces/volumes to be saved (pressurized spaces are at a premium here, remember).
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Well the question is if Mars-level insolation is even enough for the plants to start with. Half the irradiation is only comparable to dawn/dusk on Earth, so I imagine you need to put lights on anyway to make sure that the plants receive enough light (plants doesn't do photosynthesis if it thinks it's nighttime). Increased PV area can be offset by increased plant throughput. Also clorophyls only absorb certain wavelengths of light, so while the LEDs and PVs might not be more efficient in the whole-spectrum it might be more efficient in the specific spectrum that the clorophyls work in. EDIT : Forgot to say that, because the plants don't photosynthesize at night, they actually increase the load of the ECLSS rather than decrease them during that time. This is something to keep in mind too regarding artificial vs. natural lighting.
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I presume this is completely artificial-light only ? If that's the case I think we might as well build them completely underground...
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Better than what would've been TV ads entering them, seriously. Those that works with the 6 seconds gap tend to be the most annoying. Is it completely local ? I've been wondering about them for a while but one thing that I've heard is that either they have whitelists that shouldn't be in there and other things. Sole reason I've been sticking with NoScript only is because I know it's completely local.
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There're a lot more things that you can grow hydroponically... If anything the only one you can't are the potatoes. The most impressive numbers coming from them are for vegetables like tomatoes, carrots, chili and pepper, and probably leaf-based stuff like spinach or lettuce. We practically already try the same on the ISS, albeit obviously on a much smaller scale. I actually have questions too, does Musk want to leave starships over on Mars or something ? If they abandon all the starships on Mars then we'd have a steady supply of starship-habs.
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I've heard that in NL they manage to produce 45 tonnes of potatoes per ha cultivated per year nationally, also 505 tonnes of tomatoes per ha cultivated per year. They extensively use hydroponics and artificial lighting (a fairly extensive article from NatGeo from 2017, figures are taken from that article although it reports in "tons" which I presume is US tons). I think it should be possible to push the size down, we just have to think in 3D and we'd need extensive use of hydroponic. Although they also sometimes ditch the natural lighting completely so perhaps we could do the same underground.
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I think we'd need to store the plants where there'd still be some natural lighting... Honestly this is the one where we absolutely need transparent inflatable structures (like greenhouses here on Earth), if you want to grow everything completely underground we'd need more electricity. That being said given the low light levels could a dedicated grow light be more efficient than natural lighting ? I imagine we need some augmentation anyway even in daytime but if we end up providing as much augmentation as it'd be for complete grow light replacement then we'd better ditch the natural lighting completely. One thing which just came to my realization is that the plants will process CO2 and return them as O2... so maybe we don't need as much O2 or H2 (for sabatier), we just need N2 and the H2 needed for refueling rockets. Animal husbandry would need a lot of population to start, and there are ways to mitigate the lack of animal sources of nutrition, but at the very least growable stuff is needed.
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They've really been upping the amount of ads on that site. Regardless of your settings with them (I've turned off everything they could possibly record from me, don't ask me about their compliance of it though) you'd still end up with mostly annoying ads (reflective of what ads they're receiving - esp. where I live - rather than their policy of showing which ad I suppose), and I think that it can figure out what you've been using the site for anyway and tend to put ads in relation with what video you're trying to watch (or just watched). On my phone there's one browser that apparently removes all of them (as in I've not yet seen a single ad watching stuff using that browser) but it's not available on PC. Rather than AdBlock I've installed NoScript which block stuff elsewhere but they don't deal with in-video ads... Does anyone have any in-depth experience with them, like maybe knowing the backend ?
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Just to be clear - 28 Feb 13:54 UTC +9, 28 Feb 11:54 UTC +7, 28 Feb 10:24 UTC +5:30, 28 Feb 4:54 UTC, 27 Feb 11:54 PM EST (UTC -5), 27 Feb 8:54 PM PST (UTC -8). EDIT : Crap, shoot and amiss. Missed it.
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I think the primary concern with Cupola was with micrometeorite impact rather than with pressure. I imagine Mars surface should see somewhat less of it... Or even if it *does* get a lot of micrometeorite impacts at the very least we can limit the angles only to 'grazing' impacts. (will limit FoVs however.) They're called "drafters". You'd still find them in any project. In the past (as in, victorian era), if you want to become an engineer, you actually have to graduate up the scheme, from surveyors to drafters to engineers. Only today do we have people studying engineering from the start. I still often look up to CAD to see whether my calculations makes sense or whether they're just a garbage of numbers. The first few habs (apart from the repurposed landers) would have to be inflatable I guess... Bring pressurized/liquefied oxygen and nitrogen for the first few missions, later on use sabatier reaction + electrolysis to provide oxygen although we'd still need regular supply of nitrogen and hydrogen. Building the habs from scratch, I'm tempted to see more of a concrete/adobe thing rather than more inflatables or tin cans. Inflatables usually mean hydrocarbon which we don't have a lot of at hand. Blast furnaces (and later oxygen blowing for steelmaking) requires oxygen to work so I think that's a lot of oxygen used up just to refine iron/steel. I'm imagining more of reinforced earth structure with the reinforcement made out of sintered rock, back on Earth we have basalt rebars but idk what rock/mineral would be suitable on Mars. This is why I think underground is the way to go, you only need the "concrete" with reinforcement for lining the tunnels rather than building everything out of it. Either that or a massive inflatable dome where the inside would look like those villages from ancient times made out of mud.