Kerbface
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Posts posted by Kerbface
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So I guess since the size of the insulation on the fuel tanks limits the amount of liquid hydrogen, this would mean that the larger the rocket, the more efficient it would be, since the thickness of the insulation remains the same (unless it doesn't...) but the tanks get larger. So perhaps liquid hydrogen is a better fuel for large launchers than small ones?
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1) The SpaceX rockets use only kerosene/liquid oxygen, which is a lot more dense than liquid hydrogen.
2) Saturn V uses 3 stages, 2 of which are liquid hydrogen. More stages tends to give a better payload fraction, as does using liquid hydrogen. Most rockets are only 2 stage because thats cheaper.
Well, cheaper is more important I suppose, no good having an efficient rocket weight-wise if it costs you more money than a less efficient rocket. On another note, I noticed the Falcon Heavy's payload fraction is seemingly quite a bit better than the Delta IV, is Kerosene/Liquid Oxygen more efficient than liquid hydrogen? I always thought Hydrogen/Oxygen was the most efficient fuel (and the main difficulty was keeping it at the right temperature).
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If only they had improved gradually on existing rockets instead of dumping them for the space shuttle... sigh...
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Then wouldn't remaking the Saturn V with better materials, guidance systems and other minor manufacturing improvements give us the best rocket ever? Why don't they just do that and then work on improvements on there. It'd probably be able to be completed much faster than designing the SLS from scratch, right?
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Where and when is it being released? I can't seem to find any information on it's release. I live in Western Australia, I'm guessing since it's a low budget it will have a limited release and probably not here...
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I guess everyone is discovering that banal shows about a certain small aspect of people's everyday lives are what sells.
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Some questions.
1. Why are the Spacex rockets so very heavy for their size? Eg. the Falcon Heavy is much smaller than the Delta IV but nearly twice as heavy.
2. I thought our rocket building capabilities were supposed to have improved since Saturn V, so why is it still the most powerful launcher percentage-of-mass-that-gets-to-space-wise? According to this chart at least.
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That made me laugh.
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Get some black fabric or greenscreen for a backdrop, do some practical effects and film it. Release it as stock footage or make something else out of it.
I mean I'd think that would be fun anyway...
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Lol, the way this is set out seems to be suggesting that the Empire State Building is capable of lifting 396,500 tons into LEO.
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Those are good points, though of course in the future the technology may well get lighter and more failsafes could be implemented. I think it might be very useful for longer range rovers and be able to get places quicker. And because of it's intelligent motion, it would be able to navigate without human interaction, right itself when it falls and all that sort of thing, so you would have less risk of failure from those sorts of problems.
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But it wouldn't really be silicon based life. Silicon has almost the same bonding properties as carbon which allows it to form carbon-like chains and in theory life.
I think that was partially a joke. You know, because of silicon chips.
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could be used to go into spaces humans can't and do repairs there. Like fix leaks in air ducts.
Not needing special tools but using tools already there for humans is a benefit, though whether enough of one to warrant the expense I can't tell.
I think that would be a very useful thing to get a robot to do, but it doesn't seem like this robot is designed for that sort of thing, considering they're only advertising the talking and that it doesn't appear to have any dexterity in it's hands, which are a pretty thick, blocky design.
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Interesting, what's the point though? Why do we need a little robot that can talk in space?
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The main problem I think is when people think of theories as just an idea someone had one day, that doesn't have to have any evidence or testing or verifiability at all.
The difference between a conventional theory and a scientific theory should be taught in primary school. I get so tired of people saying "Well, it's ONLY a theory, you can't prove it".
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I've found myself drawn to the 2001 soundtrack. On occasion I've gone one step further and listened to Sounds of Voyager from Space. This is a recording made by taking Voyager's observation of the electro-magnetic spectrum at 20-20,000 Hz and converting it into sound. Eerie and rather fitting. NASA has released other recordings such as:
Going by one commenter and the recording of the original sounds of the Jupiter encounter on his channel, these sounds are heavily edited and are not actually this awesome and pleasing to human ears in their original form.
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"Children are hungry" is in many ways a good argument as to why not to spend money on something... assuming that money is instead spent on helping people who are starving. I get a bit annoyed when it's used for countries like the US, though, who spend actually very little on space, which does have a lot of scientific value to bring, and have massive military budgets and a million useless things. There are always going to be some people in poverty, taking funding away from research is not the way to fix it, and unless you are a third world country where poverty is a major problem, cutting everything until people are not in poverty is just going to mean nothing new ever gets done.
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Not really, it's just another fluff story.
What it sounds like they're doing isn't actually '3d printing' as much as making cement, and covering buildings with it. The moon supplies most of the raw material; but they need to bring the last few ingredients over. Their "printers" are just little rovers spreading cement around.
If you want to colonize you wouldn't bring a 3D Printer, you'd bring a kelm. You can produce bricks faster than the printer can print them; and then you can lay said bricks faster than your printer can even finish the floor. *Now, you could bring "Brick Laying Rovers" but calling that 3d printing is an insult to technology.
Okay, so this isn't 3D printing, fair enough, but I think the point still stands about orbital construction. If they can get metals and other spacecraft building materials to print in micro gravity, you could save a lot of money that would otherwise be spent researching complex technologies for creating spaceship parts in orbit. It'd be slow, sure, but would probably save a lot of money.
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http://en.wikipedia.org/wiki/BigDog
Is it possible that further advanced versions of this technology might be used for future rovers to Mars and beyond? Good for exploring tricky terrain, and adapting automatically on the fly, but I'm sure there are some potential issues with it.
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Mint condition is for people who own toys as investments and not toys. Open it.
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Rpg
in The Lounge
I used to do some stuff with RPGMaker XP. I liked it a lot better than VX, which felt limiting in many ways.
Anyway, if you want your RPG to be appealing, it's got to stand out in some way. Be it the conversations you can have, the storyline, the world, the characters, features of gameplay or whatever. Of course I know you're just starting but there doesn't seem anything too interesting so far. I don't know about VX but for XP you could get loads of tilesets with which you could make really complex interiors and exteriors. I never got far into my projects, but I tried to make them interesting by putting a lot of detail into the world and having people with a lot to say and important roles in the world.
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The majority of the world believes in at least one thing that is completely unsubstantiated with any sort of logic of evidence. Many believe several. We call this the age of reason, so you'd think people would sort of stop believing in crazy nonsense but it seems to be a hard habit to shake.
Also, for many conspiracy theorists, there seems to be some sort of sense of superiority they get from saying "I know something that most morons don't because they just believe the lies."
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I wish I didn't have Steam but I had to get it for Skyrim. I don't social game or anything, I just wanted to play my single player game, but of course now I have to run it on Steam everytime. I always get out of Steam once I'm done playing Skyrim.
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Well... umm... erm... Hold on while I grab my pitchfork.
There is no pitchfork.
Kerbals: What Are They Made Of?
in Science & Spaceflight
Posted
I think I remember reading that they were about 25kg, so if that's the case, no.