| In
            1933, Jacobs enlarged their 7 cylinder radial engine from 589 to 757
            cubic inches to create the L-4.  The L-4 (or R-755)
            was a very successful engine with Page Industries manufacturing
            small numbers as late as the 1970s. | 
           | 
          
            
                | Seven-cylinder, air cooled, radial engine |  
                | Displacement: 757 cubic inches (12.4 liters) |  
             
           |