| The class ET21 was the first post-war Polish electric locomotive, designed in 1955. 726 units were produced until 1971. As Co'Co' type of the locomotive, nicknamed Sputnik, it has two bogies. Each of them having three axles with separate propulsion for each wheel set. It is suited for pulling freight trains weighing up to 2500 t. with top speed of 65 kph or passenger trains with top speed of 100 kph. |