11/29/2023 0 Comments Submarine drawing 3d![]() Figure 3: Exposed Pressure Hull (MBTs at forward and aft).įigure 4: Enclosed Cylindrical Pressure Hull (MBTs throughout the length).įigure 5: Waisted Pressure Hull (MBTs at certain parts of the length).įigure 6: Exposed pressure hull reduced at ends (MBTs at forward an aft). Some arrangements of MBTs are shown in the figures below. Other designs have completely different outer and pressure hull, with space for ballast between them. Some designs have MBTs only at the forward and aft regions, and the rest of the pressure hull is flushed with the outer hull. We will understand the working of MBTs after we deal with the process of submerging a submarine, and submarine stability. The distribution of main ballast tanks in a submarine depends on the shape and interaction of the outer and pressure hull. Now, the “floodable” spaces are compartmentalised into tanks, which in submarine terminology, are called Main Ballast Tanks. Hence, the hydrostatic pressure on the outer hull is negligible. Why? Because, in submerged condition, the spaces between the outer and the inner hull always remain flooded with seawater. The pressure hull is housed inside the outer hull, which is not pressure tight. Figure 2: Cylindrical Pressure hull and Outer hull of a submarine. It is called the pressure hull because it is designed to withstand the hydrostatic pressure at the maximum operable depth of the submarine. The hull that houses all the accommodation spaces, weapons, weapon control systems, communications and control room, battery banks, main and auxiliary machinery, is the pressure hull. Most designs of submarines have two hulls.
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