The challenge for designers of submarines with an ocean going capability is to achieve a power and propulsion system design which allows the ambitious transit distances to be achieved whilst still allowing for stealthy operations in the mission area. Using the BMT concept submarine design, Vidar-36, this paper shows the consequences of changes to the size of the main battery, the main engine, embarked fuel and the AIP capability within prescribed limits. The way in which the different combinations of these energy elements affect the operating parameters, such as the achievable range, for a range of snort and submerged speeds is shown. The performance benefits of modern batteries and modern diesel-engined generating sets (DG sets) are also explored. This information will also allow those who set platform requirements to better appreciate the conflicting challenges which need to be overcome to achieve a balanced submarine design.
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