|unit_cost= |production_date= |number= |variants= |weight= |length= 130 metres (bottom of page) |part_length= |width= |height= |diameter= |crew= |cartridge= 140 kg |caliber= 150 mm |action= |rate= 300 shells per hour (projected) |velocity= 1500 m/s |range= |max_range= 165 km |feed= |sights= |breech= |recoil= |carriage= |elevation= |traverse= }} The V-3 cannon (German: Vergeltungswaffe 3) was a German World War II supergun invented by Röchling's Chief Engineer Coenders and housed in a huge underground complex at Mimoyecques in northern France. Also known as the "High Pressure Pump" (German: Hochdruckpumpe) and the "Fleissiges Lieschen" (English: diligent little Lisa), (bottom of page) the complex was attacked during Operation Crossbow using Tallboy bombs and Operation Aphrodite guided drones and liberated by Canadian forces in late

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