The , water-cooled, , inline 4-cylinder Praga engine sat directly in the fighting compartment. It had a top speed on the road of . The suspension was a modified version of that used in the Carden-Loyd tankettes. The Tančík vz. 33 (literal translation "Tankette model 33") was a Czechoslovak-designed tankette used mainly by Slovakia during World War II. Seventy-four were built. The Germans seized forty when they occupied Bohemia-Moravia in March 1939; there is no record of their use. The Slovaks captured thirty at the same time when they declared independence from Czechoslovakia. In Slovak service it only saw combat during the Slovak National Uprising.