A polish Prototype by Kracow Industries, The KIV (Kracow Industries Version) was made to compete with the PZL-54 of the same name by Tallinn Industries, The reason Tallinn Industries win is because their plane was "Slightly" simpler then Kracows, reason for that was Kracow's had an internal drop tank, and a nose mounted cannon.

Specs

Max Speed: 425kmh
Cruising Speed: 390kmh
Horsepower: 1863Hp
Cew: 1
Maintenance Time: 10 hours (w drop tank inclusion)
Internal Weapons: x2 DSKZ 12.4mm Machine Guns, x4 DSKZ 7.6mm Machine Guns, and x1 17mm SIV
External Weapons: x2 750Kg MK55s
Fuel Capacity: w/ drop tank = 5040L, No drop tank = 4082.4L

Reason for creation/backstory of all PZL-54s

It was created to counter the LA-4Ns being feilded by the soviets. The plan was for it to be better in every way Armor, speed, firepower, ect. The project started in 1938 and ended in 1940 after of all the version (KIV, TIV, WVCV, and RIV) the TIV was chosen. This eventually led to MANY different plane projects based on the PZL-54 Project from everybody but TIV (more on those later). Although the TIV was promising against LAGG-3 and DB-3s, it never encountered them and was outclassed by everything on the battlefield so they rushed into production the "Further Development Projects" from Kracow Industries, Warsaw-Villinus Co., and Riga Industries. Causing planes like the PZL-55, PZL-56, and PZL-67 to become the strongest planes on the battlefield.

Happy flying