>>928343 Nah hes right. if you devoted your self and did it tediously and didnt half ass it. 20 years. you gotta design it. the heat resistant meaterial isnt that expensive. in fact liok uo how nasa foynd it,it was one of those things that was in commercial hse already,and they foynd a property for it. anyway, you coudl build a small space craft.
>>928363 A weather balloon is not orbit mother fucker. Launching a model rocket off a weather balloon is also not orbit.
There are hundreds of magnitude differences in the energy required to reach an altitude, and to be in orbit at an altitude.
reaching even what would be called 'orbital altitude' is VERY different from going fast enough that you stay at orbital altitude. This is high school physics guys. You aren't just jumping up to space, you'd fall back down right away. You need to run so fast that when you fall towards earth you miss the ground.
>>928392 This. Op needs to play more kerbal. Its not a matter of going up, its a matter of reaching a thinner layer of atmosphere then entering boost phase where you curve away and accelerate tangentially, simultaneously stopping the rocket from falling straight back down and accelerating parallel to the earths surface so that you continue to fly around it.
OP it's not that hard. The modified V2 rockets that sent men to orbit a long time ago where simple in design. The real problem is that you need to crash a 100 rockets to get 1 to work. Hence the term rocket science. The development of such a rocket will take a ton of money and time. Testing will set you back as well. Rocket fuel is not something you get at the hardware store(V2s used oxygen and alcohol tho. These are not space worthy). Also orbital mechanics are a bitch to get right. And even id you make a rocket the government will take it since it's essentially a weapon (and a potential WMD). Even If you get past this you need to get the right paperwork to have something in orbit, signals for your rocket must not effect other signals like telecommunication or GPS, as well as a licence to "see from space" if you have any sensors in your design, witch is a bitch to get approved internationally. There is a saying that in order to get a rocket in to space you need a stack of paperwork as high as your rocket. So even if you where some sort of billion dollar nut job genius you still need to get to the proper legislation. Having said that you can hire a company to do the work for you. I cant remember the company but I think the did low orbit satellite work. These have a 3 year life span and burn up on re-entry and if I remember correctly it was really really cheap about 8-10k $ with some weight and volume restrictions. So if you really want to get something up there this might be your best bet.
Long Answer: Play Kerbal Space Program. You'll learn why.
Really Long Answer: Getting to space is easy. Go 30km straight up. 90% of the world's population lives farther from a beach then they do from space. Getting to orbit is fucking hard. Go 30km straight up, while also overcoming drag, while also accelerating to 8 thousand meters per second (aka 17895.49 mph), while not burning up from the compression heating due to those speeds on the way up, while carrying the fuel you need to get back (and not burning that, either), while having enough heat shielding left to not burn up on the way back, while carrying enough oxygen to live (and not burning that! o2 really likes to burn after all), while carrying some kind of recovery system (such as parachutes) (and also, not burning those) and do all of it without losing control of your craft and either experiencing an unplanned lithobraking event up or drifting away into space forever. Oh, and you have to do all of this by yourself, including the materials research, infrastructure creation, and everything else.
Good luck with that. It took world superpowers with unlimited money multiple decades to pull it off their first time. Maybe you'll have better luck though.
That question is very poorly laid out. Please define your terms. For instance when you mean "capable of completing one full orbit" what do you mean? Holding pressure for one orbit? That would be easily done i believe. Though it of course depends on how big the item you are talking about would be.
The main problem with space flight is getting enough energy(fuel) and controlling it well enough to get into orbit. the orbiting, and the design of the orbital vehicle are of least concern compared to getting safely and securely into orbit, and coming back down in the same manner.
>>931573 I used to do a lot of amateur rocketry a while back. Most of my launches were solid fueled, but my most fun were with simple liquid fuel. designs with a solid booster stage. I made the engines with a friend of mine, but the limitation was always the budget and the fact that our metalworking skills are shite.
I think that, if given the resources (budget!), and the help of a skilled metal worksman, I would at least be able to send a tiny payload to space on a ballistic trajetory. Orbit on the other hand, that I doubt. I simply have no knowledge of how to calculate the shock heating experienced during launch and reentry, much less cater for it with appropriate shielding.
Do you guys think this would work? We could have someone on a space station(Attached to it) hold a giant rope all the way to the bottom of the earth. Then a guy on a really-powerful catapult would grab the rope and be swung around to the space station.
A weather balloon can get you as high as 300,000 ft. Launching a rocket at that altitude reduces delta v requirements to something more manageable as long as the payload is light enough. I'm not saying you are going to be able to send your own communications satellite, but something like sputnik is doable.
There was a rocket enthusiast i heard about years ago that was trying to do just this. Hes ~49 and was building progressively larger and larger solid rocket motors. Using something mixed in with a type of rubber as fuel IIRC.
He'd even made a mock up capsule thing that fitted him, avionics LS and not much else in it for his orbital (sub-orbital??) trip. It had taken him years to get to like 4-5 metre long rockets, and he had heaps of help to get there. His most recent one blew up tho :/
So no, you can't do it yourself, but you can get high enough if you got a couple spare decades an lots of money :D
>>934519 You can't get any decent hardware off a scrapyard anymore. Fear of terrists in spaaace means modern hardware is damaged so it can't be used again, or destroyed. There is/was a lot of Apollo and cold war space hardware, but it's now a collector's market.
what about using the weather balloon thing from the kingsmen movie? add some hybrid rockets to each side gut all of the missile stuff add some shielding for the pilot. components have gotten quite a bit smaller since the Apollo missions surely you should pack only the necessities (guidance and life support) in to that small space.
Delta v to LEO is about 9k m/s (17,600 MPH for the Muricans. Yes, thats right, seventeen fucking thousand). LEO velocity is 7.8k m/s. That means you're only saving 1.2k m/s by using a balloon - and that's assuming the balloon gets you all the way past the atmospheric boundary, which it can't. In reality, the balloon only gets you 500-800 DV, which won't make a dent in achieving orbit.
>>934823 Remember that 90% of getting into orbit is gaining velocity. Altitude is easy, so a balloon just doesn't save you much. Orbital velocity is 7,800 m/s. Since a balloon won't have any velocity to start, just altitude, you need to carry enough delta v in fuel to get all 7.8k of that.
That's still going to be a LOT of fuel. Let's look at a real rocket. I've *VERY* roughly divided it's stages (completely guessing on DV numbers, I don't know what the Falcon 9 actually uses). Yes there is more then 9k DV, but the rest will be used for delivering the payload into a higher orbit, I'm assuming it's a communication satellite that needs to be way up there. About 1/4 the boost stage is used to gain altitude, the rest is spent overcoming drag and gravity and accelerating. By the time the boost stage separates, it will easily be at the same altitude as a weather balloon (if not higher), and also already be traveling about 2km/s.
So, to launch from a balloon and enter orbit, you're only cutting off 1/4 of the boost stage. You still have to lift the entire rest of rocket. Balloons are just not practical for things that big.
>>934853 Have you ever heard of a tethered rocket? I read somewhere they were contemplating a tall rocket tower that feeds the rocket fuel. The idea is that because it burns so much fuel fighting inertia you could keep the fuel coming for a little while. At least until it clears the tower.
>>935007 Interesting idea, never heard of it before. I don't know enough about actual rocket tech to say for sure, but AFAIK it isn't possible. Rockets use a TON of fuel (literally - they use tons per minute) and pumping that much fuel around that fast is really hard.
>>928329 A manned capsule? Sure, easy as shit, that's actually the easiest part of the whole thing. Hell, getting it back down wouldn't be particularly hard, just have drag fins with some sort of ablative material (corkwood is surprisingly a viable option) and a heat shield to take the brunt of the atmospheric drag and also provide enough deceleration so you can open your chute at a low enough altitude. You could source all the materials needed to build your capsule locally, and if you wanted to be extremely conservative with your design you could just forego windows entirely for an even simpler and safer design.
Now... the hard part is getting the son of a bitch up there, but you didn't ask about that part.
You need a massive rocket to escape the atmosphere. >Pic related is a standard rocket used for putting satellites in space.
You'd need to weld on a scale that normally takes 100 people months. You'd need to host an entire control room yourself. You'd need to have build a massive launch pad with coolant systems. You'd need thousands of gallons of solid and liquid fuel
On top of this, if you don't do it exactly right, your millions of dollars will self destruct on launch.
>>928329 Huh. just reread question. technically the answer is yes. would just need to build pretty much a submarine, which people have done on their own before. The trick is launching it. So: build, wait for a space elevator to finally be built, buy ticket, orbit with tiny pressure valve rockets for orbit correction, hook back up to elevator top after a day with orbit correction (because elevator station would also be in geosynchronous orbit), done.
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