
After Huang took over the position as chief designer of the Type 091 submarine from Peng Shilu in 1983, he argued that the linear-shape design is no longer suitable for nuclear-powered submarines which operate at high speeds and at depths of up to 300 meters.
Since each tangent plane of the hull is round in a streamlined water-drop shape, Huang believes the boat will be subject to minimum friction or drag while maintaining stability at great depths.
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