> At low temperature, low pressure, and no load the engine runs.   
      
   Yeah I see that. We have to be patient and not waiting for pressure.   
       
   > As load is increased (starting with the energy required to open/close    
   > one-way valves for pumping), more and more energy is consumed within the    
   > engine to compress/decompress the air - and this is very unsatisfactory.   
      
   But as the energy may be free, is it a real problem ?   
   5 meters with only one pump seem to be impressive !   
   I've seen an other solution a cascade (here: https://greenpeacec   
   allenge.jovoto.com/ideas/31433 ) but there is no information about a real   
   prototype.   
      
   > > Do you still think that it's a good project, or only an educational   
   > > tool ?   
   >    
   > I think it's a good educational tool - it helped me. :-)   
      
   So I hope you're okay to share some information with me ! See at the end.   
      
   > > How do you find the different sizes of volumes for the water and the   
   > > air ?   
   >    
   > I wrote software to emulate Stirling cycle engine behaviors, and    
   > customize for test conditions using variable parameters (very often    
   > guesses or estimates) and then try to construct a matching real engine.   
      
   If I submit you an idea, with information like diameters, and height of   
   pumping, will you help me for the length of tube for the "motorization" ?   
      
   > >   
      
   ... If have others questions. Because this pump is nearly safe, and cheap to   
   try and still have an interest, like pumping in a hole to a reservoir (mini   
   water tower) for gardening. We don't need pressure in a garden.   
      
   In the upside of the system... The strait non-U one or the U one. Can you tell   
   me why we heat the water ?? Why not only the air ? With a clay brick, with a   
   through hole, don't we have a system who keep the warm, permitting the air to   
   heat and expense,    
   push the water and... Fail, that create the rapid movement of the water, who   
   touch and cool down the inside of the clay. Clay who re-heat because it still   
   hot ?   
      
   The low-differences-temperature-engine-projects seem to be magic, and so it's   
   not that easy to redesign them. It's hard to remove parts. But you did it,   
   that why I'll really appreciate your help.   
      
   Pierre.   
      
      
   ps: I may see the electric power generator in the future, I'm an electrician.   
   And I have a mini Stirling motor that make me dream ! But well, we'll see that   
   in an other topic.   
   And I think that we have more to do in wasting less energies, than in produce   
   more energies. We loose heat everywhere, in every systems.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)