PZL P.11
The PZL P.11 was a Polish all-metal gull-wing fighter designed by Państwowe Zakłady Lotnicze under Zygmunt Puławski and first flown in August 1931. An advanced design when introduced, it was built in Poland as the P.11a, P.11b and P.11c and under licence in Romania as the IAR P.11f. Poland's main fighter in September 1939, it was by then outclassed, yet its pilots were credited with at least 110 victories in the campaign. A single P.11c survives, in the Polish Aviation Museum in Kraków.