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  1. Return-path: <ota+space.mail-errors@andrew.cmu.edu>
  2. X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson
  3. Received: from beak.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests)
  4.           ID </afs/andrew.cmu.edu/usr1/ota/Mailbox/MaFFD2e00VcJ8:Rk4o>;
  5.           Mon,  7 May 90 02:20:52 -0400 (EDT)
  6. Message-ID: <oaFFC=u00VcJA-O04o@andrew.cmu.edu>
  7. Reply-To: space+@Andrew.CMU.EDU
  8. From: space-request+@Andrew.CMU.EDU
  9. To: space+@Andrew.CMU.EDU
  10. Date: Mon,  7 May 90 02:19:56 -0400 (EDT)
  11. Subject: SPACE Digest V11 #369
  12.  
  13. SPACE Digest                                     Volume 11 : Issue 369
  14.  
  15. Today's Topics:
  16.             Re: Niven's spacecraft drives
  17. ----------------------------------------------------------------------
  18.  
  19. Date: 7 May 90 06:03:44 GMT
  20. From: usc!samsung!munnari.oz.au!uluru5!danielce@ucsd.edu  (Daniel Ake CAROSONE)
  21. Subject: Re: Niven's spacecraft drives
  22.  
  23. In article <9005041950.AA27399@cmr.ncsl.nist.gov>, roberts@CMR.NCSL.NIST.GOV (John Roberts) writes:
  24. [About LArry Niven's reactionless drives]
  25. >  - To avoid violating conservation of momentum, one would have to assume that
  26. >    the reactionless thruster pushes against extremely distant objects (perhaps
  27. >    the universe as a whole).
  28.  
  29. Ummm, if the drives "push" against something, surely they don't qualify as
  30. reactionless. I understood that the whole point of these drives was that they
  31. DID violate C of M.
  32.  
  33. ------------------------------
  34.  
  35. End of SPACE Digest V11 #369
  36. *******************
  37.