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          Pratt
      & Whitney Canada PT6A
           | 
         
        
          | The
            Engine | 
           | 
           Specifications
            (typical) | 
         
        
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           | 
           | 
         
        
          | In
            the mid-50s, P&W decided to concentrate on turbine engines for
            general aviation.  Their first product was the PT6A. 
            Forty years and 34,000 engines later (not including the PT6T), the
            PT6A is still a leader in the corporate and general turboprop
            market.
             Depending upon the model, the PT6A produces from
            580 to 1,940 horsepower (432 - 1440 kW).  | 
           | 
          
            
                | Turboprop |  
                | Compressor: three stage axial with single stage
                centrifugal |  
                | Turbine: 1-stage HP and 1-stage LP for the prop |  
                | Mass flow: 5.9 - 9.5 lbs/sec |  
                | Pressure ratio: 6.5 - 10 |  
             
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          |  Models | 
           | 
           Used
            by | 
         
        
          |   | 
           | 
           | 
         
        
          
            
                | PT6A-25: 400 hp (298 kW) |  
                | PT6A-27: 652 hp (486 kW) |  
                |  PT6A-42: 850 hp (634 kW) |  
                |  PT6A-50: 1,120 hp (835 kW) |  
                | PT6A-67B: 1,200 hp (895 kW) |  
                | PT6A-67D: 1,280 hp (955 kW) |  
                | PT6A-67R: 1,424 hp (1062 kW) |  
                | 
          PT6A-68: 1,708 hp (1274 kW)  |  
                |  PT6A-114: 600 hp (477 kW) |  
                | PT6A-135: 750 hp (559 kW) |  
             
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             page updated 02 January 2010
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