WThe Lublin R-XIII was the Polish army cooperation plane, designed in the early-1930s in the Plage i Laśkiewicz factory in Lublin. It was the main army cooperation plane in the Invasion of Poland. Its variant Lublin R-XIV was a military trainer aircraft.
WThe LWS-3 Mewa ("Seagull") was a Polish observation and close reconnaissance aircraft, designed in the late-1930s by the LWS factory. It was ordered by the Polish Air Force, but did not manage to enter service before the outbreak of World War II.
WThe Nikol A-2 was a small, amphibious aircraft designed and built in Poland in the 1930s. Only one was completed before World War II.
WThe PWS-19 was a Polish reconnaissance and bomber plane prototype of the 1930s, constructed in the PWS.
WThe PZL.23 Karaś was a Polish light bomber and reconnaissance aircraft designed in the early 1930s by PZL in Warsaw.
WThe PZL.43 was a Polish light bomber and reconnaissance aircraft designed in the mid-1930s by PZL in Warsaw. It was an export development of the PZL.23 Karaś. Its main user was the Bulgarian Airforce who called it the Chaika.
WPZL.46 Sum (sheatfish) was a light bomber of the Polish Air Force before World War II, which, was directed to serial production in the spring of 1939. These planes were in production, but the Polish industry did not manage to produce them before the outbreak of the war.
WThe RWD-14 Czapla was a Polish army cooperation aircraft, designed in the mid-1930s by the RWD team, and produced in the LWS factory from 1938. A series of 65 aircraft were built and most were used by the Polish Air Force observation squadrons during World War II in 1939.