Space/Science » in reply to Do the numbers, Tom. Then forget it.

The whole thread (31 posts)

• Airships to orbit - Tom Brosz - 5/27/2004 3:07:34 AM
  • re: I don't understand why anyone would build all that hardware if they didn't do the numbers - Success_Machine - 5/31/2004 4:10:21 PM
    • There's no way you'll get an L/D of 50 - Gary - 5/31/2004 8:27:13 PM
      • re: I believe it does get an L/D of 50, when forced to go hypersonic speed - Success_Machine - 6/1/2004 11:06:48 AM
  • There are exactly TWO practical ways of launching a payload into orbit. - David F Mayer - 5/30/2004 5:22:24 AM
    • Actually...... - Gary - 5/31/2004 8:31:49 PM
      • A scramjet won't get you into orbit (they flame out at Mach 10). - David F Mayer - 6/1/2004 1:03:18 AM
        • Scramjet 101 - Gary - 6/1/2004 4:35:26 AM
          • re: Scramjet 101 - David F Mayer - 6/2/2004 12:32:24 AM
            • Use a detonation wave analogy to understand this - Gary - 6/2/2004 3:27:55 AM
              • You wrote: "You'll find that the detonation velocity for hydrogen-air at STP is 1968 m/sec" - David F Mayer - 6/2/2004 7:06:04 AM
                • Yes, air for combustion is pre-heated by the bow shock - Gary - 6/2/2004 4:25:13 PM
                • re: The only design for a scramjet that works in theory - Success_Machine - 6/2/2004 1:09:56 PM
            • re: Controlled Flame Speed Limited to Mach 5 - Success_Machine - 6/2/2004 2:34:40 AM
  • Do the numbers, Tom. Then forget it. - David F Mayer - 5/30/2004 5:09:45 AM
    • re: Do the numbers - Tom Brosz - 5/30/2004 6:22:58 AM
      • Look at the VOLUME of a balloon of ANY type required to lift a reasonable spacecraft to 30,000 meters. - David F Mayer - 5/30/2004 1:35:00 PM
    • I was only referring to using a balloon to lift a rocket here. (n/t) - DFM - 5/30/2004 5:19:50 AM
  • re: Airships to orbit - Nathan Koren - 5/28/2004 3:12:12 AM
  • It was me... - Adam - 5/27/2004 11:33:12 AM
  • Low thrust to orbit for an airship has got to be bogus - Gary - 5/27/2004 5:52:06 AM
    • "Something is not right here." You are correct. The concept is bullshit! (n/t) - David F Mayer - 5/30/2004 5:17:07 AM
    • Color me skeptical - Larry J - 5/27/2004 6:12:43 PM
      • power sources... - Adam - 6/1/2004 11:19:27 PM
        • Still very skeptical - Larry J - 6/2/2004 2:33:32 PM
      • re: Skipping Over the Atmosphere on a Surfboard - Success_Machine - 5/27/2004 9:04:04 PM
    • re: Low thrust to orbit for an airship has got to be bogus - Adam - 5/27/2004 11:31:06 AM
      • Use VASIMR - phil - 5/27/2004 12:42:19 PM
        • For a large balloon, at any altitude, the air resistance even at low speed is comparable to its weight. I STILL say the idea is bullshit. (n/t) - David F Mayer - 5/30/2004 1:37:21 PM
  • re: Airships to orbit - Raoul - 5/27/2004 5:35:39 AM
    • Visible Horizon... - Adam - 5/27/2004 11:30:18 AM