Barnes Wallis designed 12,000 lb "Tallboy's" and 22.000 lb "Gland Slams"
Dropped from 20,000 ft, both weapons were made of hardened steel casings and reached supersonic speed before impact.
Tails were offset to induce gyroscopic spin to improve accuarcy and stop the bomb toppling as it passed mach 1.
the "Earthquake" bombs did a lot more than just capsize the Tripitz.
They destoryed Railway tunnels, most of the V1 storage and manufactuing bunkers in Northern France, the V3 "super" cannon, many U-Boat pens, two fleets of "E" boats in Channel habours that were haressing the Invasion fleets (Tsumani Bombs!!), a few bridges, the Dortmund Ems caneal (reliving the canal of its contents) and an SS barracks near Hitlers "Eagle Nest". 617 were the major player, but 9 Sqn also were good enough to be trusted to drop these expensive weapons...
The 10 Tonner was originally designed to attack the Monhe Dam, but tests showed it needed to be dropped almost on ths dam. Thus came Upkeep and 617...
One of the tripiz raids operated from Russia, with 617 and 9 attacking the Tripiz for the first time. This was propably the last time two RAF squadrons have operated in that country....