280 mm mortar M1939 (Br-5)
…and transported separately on a special wheeled cart, the Br-10, a speed of 25 km/h (16 mph) was possible with the barrel removed. For transport the Voroshilovets artillery tractor was used to haul the Br-5 gun carriage, whilst the less powerful Komintern artillery tractor was employed to pull the Br-10 cart and barrel. By the…