V3 Cannon (Hochdruckpumpe)
The V-3 (Vergeltungswaffe 3, "Retribution Weapon 3") was a German World War II large-calibre gun working on the multi-charge principle whereby secondary propellant charges are fired to add velocity to a projectile. The Sprenggranate 4481 projectile, would have been fired from the V-3 at a rate of 1 every 6 seconds.
The V-3 was also known as the Hochdruckpumpe ("High Pressure Pump," HDP for short), which was a code name intended to hide the real purpose of the project. It was also known as Fleißiges Lieschen ("Busy Lizzie").
The V-3 cannon, also designed to fire on London, was never used for this purpose due to Allied attacks on the launch facilities, especially the fortress of Mimoyecques, and the offensive in northern Europe in 1944, overrunning the launch sites. Consequently, its use was diverted, in the winter of 1944, to bombard Luxembourg, from December 1944 to February 1945, with minimal results.
The V-3 was also known as the Hochdruckpumpe ("High Pressure Pump," HDP for short), which was a code name intended to hide the real purpose of the project. It was also known as Fleißiges Lieschen ("Busy Lizzie").
The V-3 cannon, also designed to fire on London, was never used for this purpose due to Allied attacks on the launch facilities, especially the fortress of Mimoyecques, and the offensive in northern Europe in 1944, overrunning the launch sites. Consequently, its use was diverted, in the winter of 1944, to bombard Luxembourg, from December 1944 to February 1945, with minimal results.