Highball "bouncing bomb"

The Highball was a spherical variant of the Upkeep "bouncing bomb" developed by Barnes Wallis during WWII. Designed for anti-ship use, especially against the German Tirpitz, Highball skipped across water, struck a ship’s hull, sank, and detonated below the waterline.
In 1943, trials were held at Loch Striven, a secluded sea loch in western Scotland. Modified de Havilland Mosquito aircraft dropped inert Highball prototypes. A key test target was the obsolete French battleship Courbet, anchored to simulate a real naval strike. Courbet stood in for the Tirpitz, helping engineers assess skipping behavior, accuracy, and underwater detonation.
Despite promising delivery mechanics, Highball was never used in combat, as the Tirpitz was neutralized by other means.
This model is an artistic interpretation. It was constructed using internet information. As such, its geometry and details are not engineering-accurate or exact.