12,000 lb Tallboy Earthquake Bomb
The Tallboy was an earth quake bomb developed by Barnes Wallis and brought into operation by the British in 1944. It weighed five tons and, carried by the Avro Lancaster bomber, was effective against hardened structures against which earlier, smaller bombs had proved ineffective.
La Coupole (English: The Dome) at Helfaut Wizernes was a V-2 rocket assembly and launch bunker constructed in a former limestone quarry.
16 Lancasters led by single Mosquito and a P-51 Mustang bomb Helfaut Wizernes — 3 Lancasters managed to drop Tallboys (one caused the dome to shift out of alignment, two others blocked the entrance.
The V-3 (Vergeltungswaffe 3), also known as the Hochdruckpumpe (“High Pressure Pump”, HDP for short) and Fleissiges Lieschen (“Busy Lizzie”), was a German World War II supergun working on the multi-charge principle whereby secondary charges are detonated to add velocity to a projectile. it was located at Mimoyecques.
The weapon was planned to be used to bombard London from two large bunkers in the Pas-de-Calais region of northern France, which were rendered unusable by Allied bombing raids before completion. Two similar guns were used to bombard the city of Luxembourg from December 1944 to February 1945.
