Visible Horizon...

Space/Science » in reply to re: Airships to orbit

Visible Horizon...

Adam — 5/27/2004 11:30:18 AM (archived)

Hi All

Raoul, don't panic too soon. The airships at 40 km have a horizon out to 715 km - at least 28 would be needed to cover any great circle around the Earth, and hundreds to engrid the whole planet.

But who seriously thought comsats and meteorsat markets were enough to lower launch costs?

Adam

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

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