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            Wright R-3350 Cyclone 18
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          | The
            Engine | 
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          Specifications | 
         
        
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          | The  R-3350 was one of the most powerful radial engines produced in the
      United States.  Using 18 cylinders of the R-2600, gave it a
            displacement of 3,342 cubic inches.  The crucial application
            was for the Boeing B-29.
              The R-3350 was first run in 1937. The earliest
            flight I can find is on the XB-19 in 1941.  The Cyclone 18
            became the engine of choice for large military and civilian aircraft
            into the 1950s.
             
            Some later versions of the R-3350 were produced as
            "turbo compound" engines.  Three exhaust driven
            turbines converted about 20% of the exhaust gas heat energy into
            useful power.  These turbines drove a gearing mechanism that
            added power to the engine crankshaft. 
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                | 18 cylinder, air-cooled, two-row radial |  
                | displacement: 3,342 cubic inches (54.8 liters) |  
                | bore x stroke: 6.125 x 6.3125 inches |  
             
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          | Models | 
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          Used
            by | 
         
        
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                | R-3350-23: 2,200 hp (1641 kW) with
                turbocharger |  
                | R-3350-26B: 2,800 hp (2088 kW) |  
                | R-3350-32W: 3,500 hp (2610 kW)
                turbo-compound |  
                | R-3350-34: 2,200 hp (1641 kW) |  
                | R-3350-85: 3,500 hp (2610 kW) |  
                | R-3350-91: 3,250 hp (2424 kW) |  
             
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             page updated 14 July 2003
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