As soon as the Eastern part of Poland was liberated by the Red Army in October 1944 a group of designers gathered in Lublin, under the direction of Tadeusz Sołtyk, thus creating the first Polish post-war construction team.

In early 1945 the construction team moved to Łódź and on April 1, 1945, created Lotnicze Warsztaty Doświadczalne (LWD, Aviation Experimental Workshops).

On October 28, 1945, the prototype of the Szpak-2 was flown for the first time; first Polish post-war civilian plane in operation.

Szpak was a strutted monoplane low-wing utility/touring plane of wooden construction, powered by a radial engine Bramo Sh 14, left in the country by the retreating Germans.

On 17 December 1946, for the first time flew its improved experimental variant called Szpak-3 with a fixed tricycle landing gear (markings SP-AAB).

It was not built in a series either, and the prototype was used as a courier plane by the Ministry of Foreign Affairs during 1947, then by the factory.