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Everything posted by AHHans
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For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Well, I'm not holding my breath to see if this will be viable. In the end it proves my comment about entropy. -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Which video? -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Hmmm... Care to also answer my other question? (About the fraction that is actually filtered out.) -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Are you sure? And even for the minerals for which this is true, how large is the fraction that is actually filtered out? -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Then you have a situation a describe here: Proton Earth, Electron Moon Actually, most of the interstellar and intergalactic medium is ionized. Otherwise it wouldn't be transparent to photons above the ionization energy. But that means that you have an electron gas and a proton gas at essentially the same place, so that the net charge is neutral. In addition, the electron and proton gases can have different temperatures. And, yes, the proton gas will also radiate but protons are so much harder to convince to take a turn so that the electrons typically radiate more. May I introduce you to the concept of Entropy and the related problem of undoing it. Well, photons of different color obviously have different quantum states. So, yes, they are different. My comment was more: when you send out a photon from source A to detector B, does it matter if it is exactly the same photon or if it was destroyed and re-created in vacuum fluctuations on the way? As long as the photon that arrives at B has the same quantum state. P.S. Are you sure that you want to follow this train of thought? I cannot guarantee that you'll get out with your mind intact if you keep following this. -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Creating photons is easy! Just tell an electron to take a turn. And in a hot (> 0K) body you have lots of electrons that keep bumping into each other and thus forcing each other to take turns, that's where all your photons come from. Well, can you tell the difference between two photons if both have the same quantum state? In other words does it matter if it is the "same" photon if you can't tell the difference? But IIRC you usually consider photons to be absorbed and then re-emitted when they scatter off a bunch of electrons. You are correct! The photons we see from the sun are emitted from the outer layers - the so-called photosphere - of the sun. The energy that led to the creation of the photon took quite some time to travel from the core of the sun - where the actual fusion happens - to the outer layers where the created photons can finally escape this ball of plasma and go all the way to Earth. So the title of that article and its storytelling is mostly poetic license and not literal truth. IMHO this becomes rather obvious when it discusses the convection zone in which the energy is transferred in the form of convection and not by radiation. [Edit: that was supposed to be another post, but the forum software had other ideas...] Only if you make sure that all plastic bags are actually collected and recycled! Oh, and you have a nice and clean way to generate the energy need for collection, transport, and recycling. But let's tackle the problem of making sure that none of the plastic winds up in the ocean first. -
Am I the only one who got a minor panic attack on reading the topic title? Because I thought what would happen if the Kerbals started organizing themselves into trade unions.
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Dealing with very large ships
AHHans replied to king of nowhere's topic in KSP1 Gameplay Questions and Tutorials
Time-warp doesn't eliminate structural stress / deformation, it only eliminates relative motion. So it does help against the shaking, but not in the way you wrote down. (But probably they way you meant.) But you really shouldn't need(TM) to do that, just switching off SAS and giving the structure time to relax should be enough. But for something really wobbly (e.g. my Very Kerbal Array after unfolding) I switch time-warp on and off a number of times to speed up the process. Not really. The only thing that really helps is getting a faster computer. (Faster single core speed, not just more cores of the same speed.) But if rebooting the PCs really helps, then it might be that you run out of memory, so getting more of that might help. (If you already have 16GB or more, that probably not!) -
Dealing with very large ships
AHHans replied to king of nowhere's topic in KSP1 Gameplay Questions and Tutorials
Good point! That should be possible in stock now. But I haven't had much time to play in 1.11 yet. -
Dealing with very large ships
AHHans replied to king of nowhere's topic in KSP1 Gameplay Questions and Tutorials
As @bewing and @Brikoleur already mentioned: use autostrut to grantparent. I personally don't use autostrut to root often - essentially only on craft where I absolutely need it - because of the issues with docking. If you craft starts shaking and the shaking gets worse and worse, then this may be because your control point (cockpit etc.) and the "torque generators" (e.g. gimbaled engines or reaction wheels) are at different ends of a "floppy" structure. In this case SAS will increase the flexing of the structure: if the structure is bent in one direction, then the control point points off-axis so to point back on-axis again it needs to turn into one direction. But if you then grab the other end of the structure and rotate it in that direction you actually increase the bending of the structure. Because SAS looks only at the direction of the control point it doesn't know about the flexing of the structure and will actively increase it. My solutions are to a) switch SAS off and b) have the control point close - or at least rigidly connected to - the "torque generators". -
Do nose cones still help rapiers drag?
AHHans replied to Arugela's topic in KSP1 Gameplay Questions and Tutorials
Hmmm... I still think the small nose cone looks better, with only the dark tip poking out! -
How would I pay them though? With the money I don't have?? I feel with you. I have two suggestions that may or may not help. One is to talk to a priest, pastor, rabbi, imam, or whoever might be appropriate. Here where I am, talking to a priest would give you at least someone who listens and has some experience in dealing with these kinds of problems. The other is to look for a a self-help group. I'm fairly sure that you are not the only one who has these kinds of problems in these times. So getting together to talk about this and how the others deal with it may help you.
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Ich nehme an, dass Du auch da explizit die Deutsche Version runterladen musst. Wo hast Du KSP denn her? Du kannst auch mal in das Verzeichnis ".../Kerbal Space Program/GameData/Squad/Localization/" schauen. Wenn da nur eine Datei "dictionary.cfg" drin ist, mit nur englischem Text, dann hast Du keinen deutschen Text, den das Spiel einblenden koennte.
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For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Another possibility is that they feared that the samples from the comet might react rather violently with the oxygen in our atmosphere. IIRC there is quite a bit of carbon in that material. -
Another possibility than coming in too fast is that you are trying to dock two differently sized docking ports together. At first glance the regular clamp-o-tron and the clamp-o-tron junior can be easily confused. P.S. Yes, easily! I did it often enough, so it is easy without loads of experience!
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Plane fuel tank explosions
AHHans replied to Popaskull22's topic in KSP1 Gameplay Questions and Tutorials
Hi @Popaskull22, welcome to the Forums! From your description I would guess that the exhaust of one or more of the engines is directed at a part of the craft and thus heating that part. But that's only a guess, we could tell you more if you could post a screenshot of the craft or if you put the "*.craft" file of the craft onto a file hosting service and gave us the URL of that. P.S. Quick guide to posting pictures on the forum. -
Yes. No. Once they are outside the physics range, then the worst thing that the ISRU and drills do is to not mine enough ore / generate enough fuel. The problem you had was because you were time-warping while having the mining rig in focus. For some reason the heating and cooling calculations during time-warp are messed up, so some parts get really hot while time-warping at one speed while being fine when time-warping at another speed and/or at normal speed.
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Space plane heat shielding?
AHHans replied to strider3's topic in KSP1 Gameplay Questions and Tutorials
I use "to grandparent". But that helps you only so far, put too much load on them and they'll go their separate ways. Actually that only happens to me when I didn't bleed off enough speed at high altitude and find myself with too much speed at low altitudes. In this situation hard maneuvers in pitch are contraindicated. I like my MK2 parts with a long nose and a delta wing (e.g. here). So I usually need trim the plane by pumping around fuel anyhow. -
Space plane heat shielding?
AHHans replied to strider3's topic in KSP1 Gameplay Questions and Tutorials
In addition to what @Snark wrote, my personal experience is that the wings of a spaceplane tend to react poorly to high g-forces. And because Kerbals can withstand even fairly high forces for a bit of time, my spaceplanes tend to self-correct high g-forces by shedding wing area, even before the pilots pass out. (Well, at least during the aerobraking part. Such an event usually leads to a lithobraking event, that is typically less survivable for the pilots. ) -
I believe it is by design. I guess the thermometer shows the surface temperature of the part that it is attached to. Each part has a certain "thermal mass" that takes some time to heat up or cool down when being heated or cooled. So the slow changes in the reported temperatures reflect the slow(-ish) change of the part temperatures.
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My guess is that it has a lot to do with the fact that opening an airlock isn't that trivial as it sounds. Well, at least not if you want to continue living a long time afterwards. AFAIK just getting into a spacesuit, making sure that it works, pumping down the airlock space, and then reversing the whole process is a major undertaking. And something that you probably don't really want to do surrounded by piles of trash if you can help it. You also loose some air every time that you do that.
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Nice! That'll make landing at anomalies much less annoying!
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For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
Thanks for the link! And well, maybe not so recent... -
Best Hull/Thickness For Longterm Manned Spaceflight
AHHans replied to Spacescifi's topic in Science & Spaceflight
Not really. You need the large thickness of shielding to shield against (extra-solar) cosmic rays, because the single particles have high energies (>> several GeV, up to 1020 eV). These particles form particle cascades when they hit the atmosphere or denser matter. To shield against this you need enough material to have a high enough number of generations in the cascade so that the single particle energy is low enough to be stopped. (The cascades from the higher energy cosmic rays don't get stopped in our atmosphere, but they are few of those so that's what we can live with.) Solar wind, solar flares, coronal mass ejections, etc. is all low energy stuff(*) with energies of usually less than 1 GeV per particle. Compared to the high energy comic rays there are lots of them - and even more during solar flares - so that's what causes the largest biological effect for the time being. (There are a few orders of magnitude between the number of solar and extra-solar particles.) But you don't actually need all that thick shielding to nearly completely block that. You "only" need about 10 cm of steel as shielding, not a meter or more. But even that is beyond our capability right now - and for the foreseeable future - so people are worrying about that before they start thinking about the smaller and even more impossible to shield against threat. (*) At least for someone who worked on detecting cosmic rays at energies of 1017 eV and higher. -
For Questions That Don't Merit Their Own Thread
AHHans replied to Skyler4856's topic in Science & Spaceflight
[copy ... Wikipedia ... paste] Oh, that's a thing? Well, the "Oberth maneuver" is one special application of the "Oberth effect".