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About KG3

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    Spacecraft Engineer

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  1. Ok, I think there is some confusion happening here. The wheels of are not driving the aircraft forward, it's the propeller. If you really want to mess with the aircraft try it with the parking brakes on, on the back of a flat bed truck driving down the highway the opposite direction the aircraft is pointing.
  2. KG3

    Agreement for Mars Sample Return

    Just out of curiosity (ha), if we could bring just on gram of material back from mars, out of all the stuff examined by the rovers so far what would we most want to bring back? Ok, maybe a single gram isn't much to work with but what's the highest priority material for a return to earth?
  3. KG3

    Bad science in fiction Hall of Shame

    Zombies as depicted in most genre do seem to violate at least a couple of the laws of thermodynamics. However maybe the zombie's cells revert to an anaerobic type of metabolism which could keep them alive without oxygenated blood. I've also noticed that the zombie's bones seem to become weak and brittle over time. Maybe it's because nutrients like calcium leech out into surrounding tissues. They also seem to eat anything that moves.
  4. That's exactly what I was thinking. The photons would wander through the mirror once they had enough energy.
  5. There is nothing particularly special or different about our galaxy compared to the rest of the universe. If it's in this galaxy it's also in other galaxies. It's difficult to see individual stars in other galaxies because of the distance involved.
  6. KG3

    Bad science in fiction Hall of Shame

    Scott Manly did a video a while ago about "flying" a fighter in space. What I got out of the video is that wings in an atmosphere provide a whole lot of thrust when making a turn. He points out that while the engine pushing the craft forward at a fraction of a G the wings can pull something like 9 Gs! Flying in an atmosphere without any gravity would be interesting. I think you can try it in KSP if you turn off the gravity?
  7. KG3

    (Maybe) Supernova found

    It almost sounds like the landing lights on an airplane. If you are along the approach to an airport and you have an aircraft flying towards you while decreasing it's altitude the light at the nose of the plane can seem to hang motionless in the sky for quite a while. Even small aircraft have very bright lights. I've been fooled by this before. However 85 degrees above the horizon would put this thing almost directly over head, wouldn't it?
  8. Is there a difference between "altitude" and "distance"? For instance Wikipedia says that: "The Moon's average orbital distance at the present time is 384,402 km" but Wikipedia also says that: "A geostationary orbit can be achieved only at an altitude very close to 35,786 km" Is there some point where altitude changes to distance, or does one refer to a natural object, or maybe one refers to an object that was manufactured on and left the surface of Earth?
  9. KG3

    (Maybe) Supernova found

    It should be pointed out that super nova take hours or days to brighten and can hang around for weeks. If it was only visible for a few minutes then it wasn't a supper nova.
  10. KG3

    Supersonic RC-Plane does is possible?

    Ok, in this video they claim 505 mph from a hand held radar for a glider. Very cool!
  11. KG3

    Bad science in fiction Hall of Shame

    Wow, another Jaws remake! The original Jaws did have a fair amount of humor in it. This one doesn't seem to take itself too seriously either. Looks like it could be a really fun movie.
  12. Out my way we have this place. Might be a good name too! Char­gogg­a­gogg­man­chaugg­a­gogg­chau­bun­a­gung­a­maugg
  13. Large container ships are built with a relatively flat bottom to reduce it's draft (or depth below the waterline). It's a tradeoff. The more hydrodynamic the shape the deeper the draft is going to be. Ports need to dredge channels to accommodate these bigger ships and this just gets expensive.
  14. I watched a documentary about von Braun recently. What I got out of it was that if you look at the number of people actually harmed by the V2 rocket vs. what it cost to design, build and deploy the thing you will find that it was by far the most expensive and least reliable weapon ever built. At least von Braun managed to tie up lots of vital resources that could have been used elsewhere in the war effort.
  15. The article says that it uses water as a coolant. Would they actually use water for this, would they need antifreeze or something? Star power "The solar panels that power those instruments—as well as other electronics on board—are on wing-like flaps that extend out from under the radiator. Exposed to the intense radiation, these arrays are specially designed to handle the heat and are equipped with their own cooling system. That system involves a gallon-sized water tank and pump inside the craft that streams cool water through the arrays to keep them at operating temperature." As far as making any kind of mods, it's probably best that I stay away from any kind of computer code.