{
  "export": {
    "source": "https://urth.darkrealm.vip/thread/whorl/1000",
    "note": "Exported from an unofficial mirror of a public mailing list. Copyright in each message remains with the person who wrote it.  Email addresses are obscured as `user at host`, the form the original archive published. This file was rebuilt from parsed fields rather than retained headers, so it is faithful in content but not byte-exact.",
    "addresses": "obscured as 'user at host'"
  },
  "archive": "whorl",
  "thread": {
    "id": 1000,
    "subject": "vampires rocket from Green to Blue",
    "messages": 2,
    "voices": 2,
    "first": "2000-09-01T12:46:21+00:00",
    "last": "2000-09-05T14:25:08+00:00"
  },
  "messages": [
    {
      "message_id": "<whorl-v0011-0213@digest.urth.net>",
      "from": {
        "name": "Michael Andre-Driussi",
        "address": "mantis at sirius.com"
      },
      "date": "2000-09-01T12:46:21+00:00",
      "subject": "(whorl) vampires rocket from Green to Blue",
      "in_reply_to": null,
      "reply_link": null,
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "Robert Borski wrote:\nOf course, maybe the inhumi can fly faster than 50mph, although I'm still\nnot sure how they propel themselves over that 105,000 miles of void. (I'll\nspare you my theory about short digestive tracts and le Petomaine-type\nlocomotion.)"
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "Oh good, I was going to mention bio-rocketry!\n\nI was also toying with making ablative re-entry shields from polar ice (ah,\nbut this adds to the liftoff mass; a handy field of comet ice already in\norbit?), or bio-ceramic heat tiles that could be generated, or maybe the\ninhumi can become \"gaseous\" like movie vampires (at which point maybe they\ncould play with their own density for smooth, slow re-entries?).  These are\nall just playful thoughts toward the landing side: the problems of lift-off\nseem a tad more difficult.  (Vernean supercannon?)\n\nThe gravity tide created by the close encounter is enough to raise huge\ntides (obviously: even puny Luna raises tides around here).  Given a really\nhigh mountain (Mount Everest) as the launch pad and the gravity assist of\nthe other world swinging into the sky, I wonder how low the escape velocity\n(of a 1 g world) could possibly become?  That is, I wonder if a Blue/Green\n\"Lagrange Point\" would dip deep into the world's atmosphere . . .\n\nNo, no of course not.  But where would the L-point be at closest conjuction?\n\n=mantis=\n\n\n\n*This is WHORL, for discussion of Gene Wolfe's Book of the Long Sun."
        }
      ]
    },
    {
      "message_id": "<whorl-v0011-0232@digest.urth.net>",
      "from": {
        "name": "Kevin J. Maroney",
        "address": "kmaroney at ungames.com"
      },
      "date": "2000-09-05T14:25:08+00:00",
      "subject": "Re: (whorl) vampires rocket from Green to Blue",
      "in_reply_to": "<whorl-v0011-0213@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "At 12:46 PM 9/1/00 -0700, Michael wrote:\nI was also toying with making ablative re-entry shields from polar ice (ah,\nbut this adds to the liftoff mass; a handy field of comet ice already in\norbit?), or bio-ceramic heat tiles that could be generated, or maybe the\ninhumi can become \"gaseous\" like movie vampires (at which point maybe they\ncould play with their own density for smooth, slow re-entries?).  These are\nall just playful thoughts toward the landing side: the problems of lift-off\nseem a tad more difficult.  (Vernean supercannon?)"
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "We know the inhumi can fly on Blue. If the inhumi can spread themselves\nthin enough to drift down in the atmosphere of Blue, then they don't need\nheat shielding. Our space vehicles need serious heat shielding because on\nre-entry they are basically falling through atmosphere, not flying or\ngliding. \n\nOne engineer I know described the Space Shuttle's reentry as being \"as\ngraceful as a falling brick\". Compare this to the flight of a low-orbit\nairplane like the U-2--the U-2 didn't have much in the way of heat\nshielding, because its descent was controlled flight. \n\nI agree that the problem of launch from Green is by far the more puzzling,\nunless the inhumi can somehow teleport (because of residual Neighbor blood\nmaking distance less certain?). "
        },
        {
          "kind": "sig",
          "depth": 0,
          "text": "Wombat, a.k.a. Kevin Maroney kmaroney at ungames.com\nKitchen Staff Supervisor, New York Review of Science Fiction\nhttp://www.nyrsf.com\n\n*This is WHORL, for discussion of Gene Wolfe's Book of the Long Sun."
        }
      ]
    }
  ]
}