It's not much really...

Space/Science » in reply to Wait a moment....

Adam — 4/20/2006 12:08:42 PM (archived)

Hi RL

The quoted Isp is 5,000 seconds. Assuming 3.92:1 fuel mass to dry mass, then 50 mg boosts a measly 1.84 tons dry mass. Perhaps the 50 mg is for a solid core rocket with an Isp of 900 seconds. That's 56.7 tons dry mass propelled.

Hmmm... the Coulomb repulsion problem is looking worse and worse. Wonder how they'll beat it?

Adam

The whole thread (23 posts)

To Mars on a dream, and Positrons... - nick hoffman - 4/18/2006 1:27:10 AM
- 10 mg?! - R.L. - 4/19/2006 5:10:25 AM
  - Sorry, meant to say 1kT=4.66 trillion joules... (n/t) - R.L. - 4/20/2006 11:58:48 AM
  - Wait a moment.... - Am I making a mistake here? - 4/20/2006 11:57:43 AM
    - It's not much really... - Adam - 4/20/2006 12:08:42 PM
      - 8.8 MegaCoulombs - Adam - 4/20/2006 12:13:09 PM
        
        GRRRR I was wrong... - R.L. - 4/20/2006 12:36:50 PM
        
        hmmmm, I will redo my calculation... - R.L. - 4/20/2006 12:25:34 PM
  - very carefully (n/t) - Adam - 4/19/2006 11:22:31 AM
    - Hah hah - R.L. - 4/20/2006 3:38:06 AM
      - We can start practicing on electrons. - alcaray - 4/21/2006 3:47:47 PM
      - re: Hah hah - Chris Vancil - 4/21/2006 5:58:23 AM
- 1st time i've seen a cost on producing the anti-matter - Sawyer - 4/18/2006 12:09:12 PM
  - Penn State has done an outline for a 10,000 AU mission. - Lee - 4/18/2006 7:08:39 PM
    - re: Penn State has done an outline for a 10,000 AU mission. - ljk - 4/24/2006 3:15:27 PM
- Sorry, public link below - nick hoffman - 4/18/2006 8:40:39 AM
- Like this one - Adam - 4/18/2006 3:11:36 AM
- A public link would be nice (n/t) - Adam - 4/18/2006 3:03:12 AM
  - re: A public link would be nice - et - 4/18/2006 4:03:30 AM
    - This Centauri Dreams article links to NIAC page - ljk - 4/19/2006 2:38:13 PM
      - Antimatter's Advantage - and the catch - ljk - 4/20/2006 6:59:01 PM
        
        I posted the same link above. - Lee - 4/21/2006 5:24:00 AM
        
        Antimatter from Microscopic Black Holes - ljk - 4/21/2006 3:47:11 PM

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