The V-3 (German: Vergeltungswaffe 3, lit. 'Vengeance Weapon 3') was a German World War II large-caliber gun working on the multi-charge principle whereby secondary propellant charges are fired to add velocity to a projectile. Two full-size guns were built in the underground Fortress of Mimoyecques in northern France and permanently aimed at London, but they were rendered unusable by Allied bombing raids before completion.
The V-3 (German: Vergeltungswaffe 3, lit. 'Vengeance Weapon 3') was a German World War II large-caliber gun working on the multi-charge principle whereby secondary propellant charges are fired to add velocity to a projectile. Two full-size guns were built in the underground Fortress of Mimoyecques in northern France and permanently aimed at London, but they were rendered unusable by Allied bombing raids before completion.
Source: Wikipedia "V-3 cannon" · CC BY-SA 4.0
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