| Introduced
            in 1942, the O-435 was a six-cylinder version of the
            four-cylinder O-290.  This
            engine was also developed as a light tank engine during World War
            II. | 
           | 
          
            
                | Horizontally opposed, 6 cylinder, piston engine |  
                | Air-cooled |  
                | Displacement: 434 cubic inches 
                (7.1 liters) |  
                | Bore x stroke: 4.875 x 3.875 inches |  
             
           |