Today in aviation history – 18th November

On 18th November 1930 was made a test flight of PWS-12 bis aircraft. It was a Polish training school from interwar period. It was supposed to be an aircraft for stunt trainings. PWS-12’s construction was based on PWS-11 and its constructors were Aleksander Grzędzielski and August Bobek-Zdaniewski from Podlasie Aircraft Works.