Скачать или смотреть this is how bouncing bomb work

The bouncing bomb, codenamed "Upkeep," was a cylindrical, spinning weapon invented by Barnes Wallis for WWII's Operation Chastise (the Dambusters raid) to destroy German dams by skipping across water, avoiding torpedo nets, sinking near the wall, and detonating like a depth charge at a precise depth.
Launched from low-flying Lancasters, its backspin (from a built-in engine) and specific height/speed (60ft, 232mph) allowed it to bounce multiple times before sinking and exploding, creating massive underwater shockwaves to breach the concrete dams.
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