To meet a requirement of the Polish military department, in 1928 Puławski designed a modern all-metal high-wing fighter with an inline engine, PZL P.1.

In early 1931 Puławski designed another fighter development PZL P.8, returning to his favourite inline engine.

He died on March 21, 1931, in a crash of his newest amphibious flying boat PZL.12 in Warsaw, at the age of 29 (the plane fell due to strong wind, after take-off).

After his death, the PZL P.11 project was finished by Wsiewołod Jakimiuk, becoming the main Polish fighter during the Invasion of Poland 1939.

Additionally, a faster export model PZL P.24, based entirely on Puławski's construction features, was developed and sold to some countries.