|   Pratt & Whitney R-1690Engine Specifications
 
 
        
          
            | Type: | 8 cylinder air cooled |  
            | Diameter: |  |  
            | Length: |  |  
            | Bore: | inches |  
            | Stroke: | inches |  
            | Displacement: | 1690 cubic inches |  
            | Compression Ratio: |  |  
            | Dry Weight: | lbs. |  
            | Ignition: |  |  
            | Carburation: |  |  
            | Fuel: | 80 0ctane |  
            | Performance: | 800 hp for take-off |  |