From: chakatfirepaw@gmail.com   
      
   On Mon, 09 Oct 2017 22:10:35 -0600, Greg Goss wrote:   
      
   > johnny1a.again@gmail.com wrote:   
   >   
   >>A Bussard drive works (or at least it works in fiction) because the ship   
   >>is moving close to the speed of light and the intake-field sweeps out a   
   >>huge swath of space in a unit of time.  That wouldn't apply to the   
   >>attitude jets of Ringworld.   
   >   
   > You may have stopped reading Ringworld too early.  In book four we find   
   > that they stored the hydrogen from the gas giants that they dismantled   
   > for the ring, and used that to spin up the ring, at least to the point   
   > where they had bussard speed to gather enough solar wind.   
      
   Rotation speed doesn't really help that much, it's limited by how much   
   solar wind enters the collection volume.   
      
   In interstellar space, a Bussard ramjet sweeps out a long tube of space.   
   When spinning up a ringworld, it sweeps out a torus and keeps sweeping   
   the same space over and over again.   
      
   --   
   Chakat Firepaw - Inventor and Scientist (mad)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)