The Grand slam bomb
The Grand Slam (Earth Quake bomb), was a very large freefall bomb developed by the British aeronautical engineer Barnes Wallis (who also made the bouncing bomb) in late 1944. At a weight of 9.98 t (22,000 lb) the Grand Slam was almost twice the weight of his previous large bomb, the 5.44 t (12,000 lb) Tallboy. Both weapons were intended for use against large and protected buildings, structures against which smaller bombs would be ineffective. The name grand slam comes from the game of bridge, where it is a term that means winning all the tricks, "cleaning the table".
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