The US Navy's first submarine was a hand-cranked wooden egg
The US Navy's first submarine was a hand-cranked wooden egg
1 个月前
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The US Navy’s first submarine was a hand-cranked wooden egg
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1 个月前
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In 1776 a wooden turtle quietly invented submarine warfare. In 1776, as British warships dominated American waters during the Revolutionary War, inventor David Bushnell believed the colonies needed a weapon the world had never seen. He built a small, egg-shaped vessel made mostly of wood, sealed tightly and powered by hand-cranked propellers. Inside, a single operator could steer, dive, surface, and control ballast — all by muscle alone. The craft carried a timed explosive designed to be drilled
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