305 mm howitzer M1939 (Br-18)

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305 mm howitzer M1939 (Br-18)
Br-18 howitzer.JPG
Br-18 in Saint Petersburg Artillery Museum.
Type Superheavy siege howitzer
Place of origin USSR
Service history
Used by  Soviet Union
Wars World War II
Production history
Designer Škoda
Manufacturer Škoda
Weight 45.7 t (101,000 lb)
Barrel length 6,705.6 mm (264.00 in)[1]

Caliber 305 mm (12.0 in)
Elevation 70 degrees
Traverse 90 degrees
Rate of fire 1 rounds per 3 minutes[citation needed]
Maximum firing range 16,580 m (54,400 ft)

The 305 mm howitzer M1939 (Br-18) (Russian: 305-мм гаубица образца 1939 года (Бр-18)) was a Czech superheavy siege howitzer used by the Soviet Union during World War II. After the Germans occupied Czechoslovakia in March 1939 they took over the Škoda Works, which had been working on this (Skoda XV) design and a companion 210 mm gun (Skoda VX). After a successful test firing 5 July 1939,[2] as a result of the Molotov-Ribbentrop Pact the Germans sold both designs to the Soviet Union. It's not entirely clear that Skoda actually built the weapons itself or merely supplied the blueprints. At any rate, very few weapons seem to have been built; so few, in fact, that there's no record of the Germans capturing any during Operation Barbarossa.

It used the same carriage as 210 mm gun M1939 (Br-17) as well as the same firing platform and control mechanism. It was transported in three loads.

It was most famously used to defend Leningrad during the Siege of Leningrad. The Soviet troops learned that if they fired all of them at the same time and used high-explosive shells, when the rounds exploded at the same time, they would flip over advancing German tanks.[2]