|   | 
        | 
        | 
    
    
      | R. A. Gibbs Stanley boiler replacement.  This was designed to fit in the same space as  a Derr boiler.  It is a water level  monotube with a kerosene burner gun.  The  tubes are all hair-pin bends with the 180’s being cast or forged and welded to  the straights in order to get a tight bend and a dense packing.  The straights have pipe threading on them for  their entire length.  I think this is  rolled instead of cut but have no knowledge for sure.  The threading gives double the heat exchange  surface area.  Thus this is a unique and  very interesting  | 
        | 
        | 
    
    
      |   | 
    
    
      | boiler.  We have  repaired the refractory and installed a 12 volt Beckett burner and have it set  up as a shop boiler.  Except for the  great amount of welding, this is a near ideal boiler.  It can be made in any rectangular shape, it  is mono-tube, it is water level controlled, it has a set super-heater length,  it has extended surface fins on the tubes for better heat exchange, and it is  counter flow. | 
      
    
      |   | 
        | 
        | 
    
    
      (Note: Click on a picture to see a larger view and then use your browser to enlarge it further.)  | 
      
  
    
      |   | 
        | 
        | 
    
    
        | 
        | 
      Superheater detail and fire box for the R.A. Gibbs’  boiler. | 
    
    
      |   | 
        | 
        |