From: alain245@videotron.ca   
      
   On 2024-02-20 1:51 p.m., The Running Man wrote:   
   >> For some reason, the PNN folks who were quite active on this group do   
   >> not seem to have posted anything in a long while. Did they run out of   
   >> active people, or money? Or did they finally figure out it doesn't work   
   >> and quietly closed shop?   
   >> --   
   >> /* * * Otto J. Makela  * * * * * * * * * */   
   >> /* Phone: +358 40 765 5772, ICBM: N 60 10' E 24 55' */   
   >> /* Mail: Mechelininkatu 26 B 27,  FI-00100 Helsinki */   
   >> /* * * Computers Rule 01001111 01001011 * * * * * * */   
   >   
   > What does PNN stand for?   
   >   
      
   It stands for Propulsione Non Newtoniana (Italian, meaning Non-Newtonian   
   Propulsion). A group of Italian people claiming that they have a   
   propulsion system using no reaction mass. Something like a microwaves   
   bouncing around in a closed cavity that they claim, without explaining   
   the physics behind it, that it produces acceleration. They have video   
   showing that it gives if I recall correctly some 200 mN of force. We   
   tried to explain to them that because their microwaves heat one side of   
   their apparatus more than the other side, the air is heated more on one   
   side than the other. This differential in air temperature can explain   
   the force that they measure, therefore, outside an atmosphere it   
   wouldn't work. But they don't want any of that, they are sure that their   
   "invention" will revolutionize rocketry.   
      
      
   Alain Fournier   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)