Lukaszenko

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About Lukaszenko

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    Spacecraft Engineer

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  1. Lukaszenko

    SpaceX Discussion Thread

    Probably, I didn't realize that they made ropes out of the stuff. Makes sense though.
  2. Lukaszenko

    SpaceX Discussion Thread

    Based on this link, I estimate a kevlar cable would weigh about 5 kg/m for a 450 ton BFS at 1g. I don't know how much you want, maybe 100 m? So that's 500 kg, and that's probably waaaay over-engineered.
  3. Lukaszenko

    SpaceX Discussion Thread

    Yeah, maybe, but it's tall and ladders aren't the safest things. But indeed, it will be on Mars anyway. Perhaps I overanalyzed. Still, if there is a big open common area, having space in 3d would be, well, more space.
  4. Lukaszenko

    SpaceX Discussion Thread

    There's that, but there's also the sudden need for stairs and things like that. I don't know how much space that would take, but I imagine it's a lot.
  5. Lukaszenko

    SpaceX Discussion Thread

    An elegant idea. Unfortunately, a big drawback with it, or pretty much any artificial gravity idea, it that it would drastically reduce the amount of usable space you have.
  6. Lukaszenko

    SpaceX Discussion Thread

    Same article states that they've already deorbited a large number of the old-school versions of the satellites. RIP Iridium flares
  7. Lukaszenko

    SpaceX Discussion Thread

    I'm guessing that the boat is cheaper than the fairing (half).
  8. Lukaszenko

    SpaceX Discussion Thread

    If the cost-to-orbit is so cheap, maybe it's no big deal to simply add a super-cheap propulsion, like a compressed air tank with a de Laval nozzle, for example. I wonder how much delta v you could get out of something like that.
  9. Lukaszenko

    SpaceX Discussion Thread

    Yeah, it looks like they got confirmation of booster destruction, but immediately after a "but don't say anything!!"...and then you can kind of see them backpedal and try to hide their emotions. As for the free ride on the Falcon, would have been a perfect opportunity to test that Cannae drive and put the whole thing to bed. Most of the arguments against doing just that seemed to be of the "putting it in space is too expensive" variety.
  10. Lukaszenko

    SpaceX Discussion Thread

    It would make a good first payload for the BFR
  11. Lukaszenko

    SpaceX Discussion Thread

    Apparently there's also unknown and large risks when lighting up and firing 27 engines simultaneously as opposed to one, or only 9. Resonances, vibrations, whotf knows what else. If you ask me, if one works then you just add 26 more exactly the same. Should be mundane. Good thing they're not asking me
  12. Lukaszenko

    SpaceX Discussion Thread

    Indeed no doubt they learned from THAT. Undoubtedly, one of the things they learned is that there are many more "thats" which they don't know about, and every time you change something, and even if you don't, those "thats" can creep up on you. Remember, there are millions of things that can happen to a rocket, and only one of them is good.
  13. Lukaszenko

    TWR Problems...

    As Steel said, g is 9.81, and NOT the gravitational constant.
  14. Lukaszenko

    SpaceX Discussion Thread

    So that they don't have to develop/ tool/ build/ support a completely different engine for what is used in 10% (or, in this case, 3%) of the rocket. Commonality of parts is a big theme at Space X, because it creates huge cost and headache savings. It's at the cost of a bit of payload, but apparently that is something they can spare.
  15. Lukaszenko

    In theory

    Your orbit would degrade and you would sink into the lower atmosphere (or at least parts of you). The problem is that once you hit enough atmosphere, your trajectory quickly degrades and puts you into a steep path to the denser parts...but, much steeper and hence quicker than you want to give you enough time to shed your speed and heat. The result is that you DON'T shed enough speed and heat and you either burn up or break up, or some combination of both.