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About KG3

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    Rocketry Enthusiast

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  1. Does science should be censored ?

    I feel very uncomfortable with any technology or science that is created specifically to single out a single population of people. Especially if it is a population that is actively being persecuted in different parts of the world and lives could be put at risk as a result.
  2. Are there actually regulations for satellites? How does building the capability to deorbit into the satellite in the first place effect the cost? How often do controllers loose contact with satellites before they get the chance to deorbit or put them into a parking orbit?
  3. Crackers! Whose gunna pay for all this!!! It sounds like whatever the method(s) used it's going to be nearly as expensive to take something out of orbit as it is to put it up there in the first place. Is there some way to factor in the cost of cleaning up debris to the cost of new missions? Are businesses who build and maintain satellites getting better at planning to deorbit their stuff when they are done with it?
  4. It's been shrinking for allot longer than the time between pioneer and voyager. "In fact, astronomers know that the Great Red Spot has been shrinking for more than a century. In the late 1800s the feature was nearly 35° wide in longitude, which corresponds to about 40,000 km (25,000 miles), or roughly three times Earth's diameter. By 1979, when Voyagers 1 and 2 flew past Jupiter at close range, the longitudinal extent had shrunk to 21° (about 25,000 km), though its width from top to bottom remained essentially unchanged at about 12,000 km." Also: At Jupiter, the researchers recently determined its shrinking Great Red Spot is getting more intense in color, possibly because the chemicals that give the storm its color are moving higher up in the atmosphere. Surprisingly, the storm also appears to be getting taller. Researchers previously thought that the contracting storm would host stronger winds, like an ice skater who spins faster by pulling their arms inward. Instead, however, the storm is expanding in height. “It’s almost like clay being shaped on a potter’s wheel,” NASA stated in a press release. “As the wheel spins, an artist can transform a short, round lump into a tall, thin vase by pushing inward with his hands. The smaller he makes the base, the taller the vessel will grow.”.
  5. Ok, thanks. I found it! It does say it has a high ISP but doesn't say much about thrust. I'll take your word for it. I won't bother trying to build one at home. "The efficiency of the system is surprising; specific impulses of greater than 100,000s are possible using existing materials. This is high performance, although not that which the technically daunting antimatter rocket could achieve, and the weight of the reactor core and other elements would make the overall performance of the fission-fragment system lower. Nonetheless, the system provides the sort of performance levels that would make an interstellar precursor mission possible."
  6. Do you know anything about alpha emitter propulsion? I think I came across it being mentioned somewhere. The idea was that a radioactive material could gently push a small (presumably unmanned) spacecraft without any moving parts for a very long time. I guess it could also provide electricity as well, I'm not sure. It sounded very simple but I don't know how effective it would be or what it would or what application it would be good for. I don't even recall if they said what material would be used. Is uranium hot enough, plutonium? I can't seem to find the source of this article.
  7. Anvil Shooting

    Oh... yah but it's an ANVIL!
  8. Anvil Shooting

    An anvil mod sounds like a good idea to me. I can think of lots of challenges, can you shoot an anvil onto the top of the VAB or shooting anvils on different planets and moons! Would it be possible to shoot an anvil from the surface of Minmus and have it land on the Mun? Yes, slow and patient explosives only!
  9. Anvil Shooting

    There is a space milled into the bottom of the anvils which will hold about of pound of black powder. Usually it takes two anvils to shoot an anvil. One anvil is placed upside down on a firm surface (like blocks of wood) on the ground. A second anvil (the one that gets shot) is placed right side up on top of the first anvil. Between the two anvils is about 2 pounds of black powder. I have seen a video in which a guy uses the breech of a navel cannon (around 6" I think) to shoot the anvil instead. Note that if there are any imperfections in the castings of the anvils you might wind up with a 100lb fragmentation grenade! Apparently anvil shooting is done competitively. Points are given for time aloft and how close to the launch site the anvil lands.
  10. Lunar Sports and Activities

    Cycling, you could go way fast without any wind resistance!
  11. Anvil Shooting

    Ok, I guess it might be alright to post this here because it does involve ballistics and what not (I am a black smith)? If not sorry. I know anvils aren't the most kerbal thing to make fly, I mean it's not like making a submarine fly or anything like that but I'm sure there is physics and stuff involved right?
  12. Vacuum Engines

    I guess I was interested in the old fashion afterburner jet engine (not the high bypass turbofan type) and how they are similar and different from a rocket engine. They are similar in that both combine fuel and oxidizer to create a fast expanding exhaust and thrust. However the rocket exhaust exits via a bell shaped nozzle and the afterburner exhaust exits basically via a tube. Maybe the jet engine has to accommodate the %80 or so of the stuff in the air that isn't oxygen as well as the exhaust?
  13. Vacuum Engines

    How are jet engines related to rocket engines in regards to chamber pressures and exhaust velocity? (I'm asking about the type of jet engines with an after burner) They are basically an air breathing rocket but don't use a de Laval type nozzle, right? They are by definition designed to operate in an atmosphere although at different altitudes and air pressures.
  14. Random Science Facts Thread!

    That's a serious case of crab!