The PZL.38 Wilk (wolf) (PZL-38) was a Polish heavy fighter developed and manufactured by PZL state factory in 1937.

It was initially slated to replace fighters in both pursuit and escort duties, and light bombers, along with attack aircraft.

Its construction used the diminished aerodynamic profile and configuration from the PZL.37 Łoś medium bomber.

Unfortunately, Nowkuński died in the Tatry mountains on 30 July 1936, and work on the engine slowed.

It was flown only in February or March 1939 and also did not meet expected performance (estimated maximum speed was 520 km/h, while it hardly reached 465 km/h).

The crew of two - pilot and rear gunner/bombardier/observer sat under separate canopies, far from each other, fitted with dual controls.

At the time of the German invasion of Poland, both prototypes were still not able to fly and remained in the factory at Okęcie in Warsaw.