From: nuny@bid.nes   
      
   On Sunday, January 22, 2017 at 5:41:14 AM UTC-8, eripe wrote:   
      
   (zeppelins filed with x, where x is lighter than hydrogen)   
      
   > I have an idea, Diz iz Zuper Nutz; you could fill it with photons. If you   
   > have a perfectly reflective inner side, the pressure from the light would   
   > keep it inflated with a vacuum inside.   
      
     The reflector would only have to be perfect at one wavelength. Do we need   
   Doc-Smithian technomacis Perfect Reflector fields, or will suitable stacked   
   coatings do the trick?   
      
   > Radiation P = 0,5*p*c   
   > P = 0,5 * 1E5 Pa * 3E8 m/s = 15E12 or 15 TW/m2.   
   >   
   > Im not sure how to calculate how much energy must be fed in there to build   
   > that pressure up. Say the mirror is 99,999999999 % reflective, then you have   
   > to supply 15 W/m2 to make up for the losses at 15 TW/m2. I suppose that much   
   > light would inflate it then, but how long would it take?   
   >   
   > Once you know the energy, you can find the mass from E = m c^2   
      
     Also, if the envelope is controllably deformable, it's an EMdrive!   
      
      
     Dr. HotSalt   
      
   --- SoupGate-Win32 v1.05   
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