Immediately after the Second World War in Poland there was no favorable atmosphere for opening the aviation industry. Nevertheless, in 1946, on the initiative of Professor Franciszek Misztal from the Warsaw University of Technology, the Central Aircraft Study (CSS) was established in Warsaw at Okęcie. The CSS were a kind of design bureau that had its own workshop for building prototype aircraft. CSS, as part of the Aviation Industry Association, were not a factory.
At CSS engineer Franciszek Misztal gathered pre-war aviation engineers and young students.
In 1946, the CSS office received an order from the Ministry of Communications to develop 3 aircraft: school, training and aerobatic and passenger. In 1947, the first training aircraft project was developed, which was named CSS-10. The constructors of the aircraft were Franciszek Misztal and Stanisław Lasota.
Since the construction of the CSS-10 aircraft in the workshops in Okęcie was impossible, the construction of prototypes began at WSK PZL Mielec.
In 1950 transformed into the Communication Equipment Factory. No. 4 Warsaw-Okecie.
Central Aircraft Study (CSS),
All Aero 