tomf

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About tomf

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    Sr. Spacecraft Engineer

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  1. The diagram on the previous page missed out the electron gun that injects the excess electrons into the ion exhaust neutralising them as shown in this image https://en.wikipedia.org/wiki/Ion_thruster#/media/File:Ion_engine.svg
  2. Is there a guide to using the mod? I have OPM installed and some random clicking has given me a long list of bodies about which I know 0% e.g. Nissee and a few about which I know 10% e.g. Neidon. I have a TB-75M telescope in a high orbit and I have completed the search the skies mission twice. What is the designed flow for discovering a new object and then learning enough about it to send probes there?
  3. Some sort of engine a bit like a turbofan jet with injected oxidiser would probably be more efficient in an atmosphere than just using your fuel and oxidiser in a rocket engine. Heavier though. If you are using Hydrogen or Methane and Oxygen you are going to be be better off using a fuel cell to generate electricity. Internal combustion engines tend to be pretty inefficient by comparison.
  4. But what about the space squirrels?
  5. It looks really weird the way the camera turns the sky black as the engine ignites. Makes it seem like there was a really sudden solar eclipse.
  6. For midcourse correction you would just cancel the spin, wind the cable in and reconnect the halves, perform the burn and then spin up again. If you use a 1000m cable that the two halves have a relative velocity of 100m/s, it should be perfectly possible for the two parts to use their OMS to rendevous, hook up again and resume tumbling.
  7. Are there explicit missions in breaking ground to test the passive seismometer by crashing probes? If so does anyone know the prerequisites?
  8. I just read an article quoting an Apollo communications specialist saying that soviet subs were attempting to interfere with the communications with the Apollo spacecraft https://www.clarionledger.com/story/magnolia/2018/07/20/russia-and-nasa-soviets-tried-mess-up-moon-landing-apollo-11/803975002/ It seems pretty surprising, if anything had gone wrong it would have been far to easy to point the finger for a pretty significant PR victory. Has anyone ever heard anything like this before and are there any more official sources?
  9. The problem with your first point is we aren't anywhere close to having propulsion methods that could produce any significant acceleration for any significant time. The best current engines with a mass ration of 95% could sustain 1g for about 13 minutes before running out of fuel. A NTR with ISP 800 could sustain nearly half an hour. Whereas there are centrifugal designs we could build tomorrow.
  10. The grabbing point doesn't have to be near the axis of rotation. If you could line the COM of the grabbing spacecraft up with the LM's axis and rotate at the same rate then the LM will appear to be stationary and you can grab it wherever it provides a handhold.
  11. The latest release was compiled against 1.6 but I'd be amazed if it didn't work fine with 1.7 I'm not playing KSP at the moment so I'm not going to implement anything new myself. If you are a modder and you create something new I might consider including it.
  12. The decompression from removing your helmet is going to cause some expansion injuries which would probably be pretty painful. However if you suit is out of O2 then the level of oxygen is just going to drop, if it is still able to remove the CO2 then you are just going to fall asleep. People diving on rebreathers sometimes die because they failed to turn their oxygen on. If they had noticed it would have been the work of a second to turn the oxygen valve located right by their right hand.
  13. Lots ships over trivial size get a prefix e.g. RMS Titanic SS , MV and MS are common for passenger vessels I can't think of a better prefix than BFR though.
  14. I believe this image comes from the paper where they are showing what the image would look like for various axes of rotation for the black hole and the accretion disk. For reasons I don't quite understand but are something to do with relativity it is the direction of rotation of the hole (the black arrows)rather than the direction of rotation of the accretion disk (the blue arrows) that has determined where the bright spots are.
  15. That thing leaves the pad fast!