Polikarpov
 
      
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        Polikarpov I-16 Type 5The Polikarpov I-16 is a Soviet single-engine single-seat fighter aircraft and it was the world's first low-wing cantilever monoplane fighter with retractable landing gear. USSR dispatched around 475 I-16 Type 5s and Type 6s to Spain.
 
                                                             
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                         
                                                                        