/kloc-in the 0 th and 6 th centuries, real submarines appeared. 1578, the British mathematician William Bourne wrote the book Invention and Design to describe submarines. According to the previous design, the propulsion of cornelius Jabs Zong Duport was generated by manual operation.
In 2002, the BBC TV program "Building an Impossible Building" was broadcast. According to the design drawings of that year, Kyle Edwards Company built a Derbord submarine with two people on board, and successfully snorkelled in Doni Lake in Eton.
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During the 65438+1980s, submarines made progress day by day, and countries gradually realized its importance. The United States, Britain, France, Sweden, Italy, Germany and Russia are all keen on research and development. 1878, British-American john philip holland devoted himself to this work. 1900 In April, the U.S. government purchased its submarine Holland 9 and incorporated it into the U.S. Navy. Since then, submarines have officially become naval vessels.
1898, Maxim rabo, a Frenchman, first built a "narwhal" with a double hull structure, which stored ballast water between the two hulls, with the advantage of greatly increasing buoyancy. This later became a Soviet submarine.
1863, France built a submarine named "Diver". The hull is designed to imitate the shape of dolphins, with a length of 42.67 meters and a displacement of 420 tons. Powered by a 59 kW (80 HP) steam engine with a speed of 2.4 knots, it can dive underwater for 3 hours, with a dive depth of12m. Powered by a steam engine, Diver surpassed all submarines at that time and became the largest submarine before the 20th century.
References:
Baidu encyclopedia-submarine