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      An Introduction To P64
      
    
      
        
          
               
              An Introduction To P64 
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      Welcome to the Proto:64 Special Interest Group's (SIG's) presence on the
      world wide web. This site should answer all of your questions about
      Proto:64 modeling, who's doing it, and why we would like you to join us.
      The original author of this site was Keith Thompson. If you have any
      questions about this site, please contact the Webmaster at:
      p64 AT dapenguin DOT net 
    
     What is Proto:64?
    Proto:64 is S scale (3/16" = 1') modeling using finer standards for track
    work and wheelsets. The most obvious difference between Proto:64 standards
    and 
NMRA/
NASG
    S "scale" standards are the width of the wheels and the associated narrower
    flangeways. The existing NMRA S-4 standards use wider-than prototype wheels
    to compensate for less-than-fastidious track work.
    
      
        
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          NMRA/NASG 
              Code 110 
              "Fine Scale" 
              Wheel Profile | 
          NMRA/NASG 
              Code 124 
              "Course Scale" 
              Wheel Profile | 
          
            NMRA P64 Code 87 proto Wheel Profile 
              Compared to NMRA/NASG RP25  
              Code 110 "Fine Scale" and Code 88 " XFine Scale" 
              Wheel Profiles | 
          Prototype 
              Wheel Profile 
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     Why Proto 64 now?
    S scale standards were developed years ago when machining and molding
    techniques weren't as sophisticated as they are today. The resulting model
    work is still quite good but Proto:64 practitioners are striving for that
    "just like the prototype" look. Proto:64 takes advantage of finer tooling
    techniques and better materials. Don't get us wrong, we all come from the S
    scale world and some of us pick and choose Proto:64 standards to suit our on
    individual tastes. The glue that binds us is a desire to have the most
    realistic models in 3/16" scale.
    
    
      
        
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     This Page Updated April 12, 2010
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