PWS-20
The PWS-20 was a Polish single-engine high-wing 8 passenger airliner, built in the PWS factory and when it made its first flight in 1929 it became the first Polish-designed transport aircraft to fly. == Development == The aircraft was developed by Zbysław Ciołkosz in response to a request announced by the Polish Ministry of Communication in 1927 for an airliner to be used by LOT Polish Airlines, and was competing against a sizable number of other designs from other Polish designers, including the Stemal VII, 4 unbuilt proposals from PZL, the Lublin R-IX, and the Medwecki M.N.2.