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Material Plastic Theme XX century Scale 1/350 Condition New Information about model: The single Project Beluga-class experimental submarine featured a hull shape similar to but smaller than that of the nuclear propelled Sierra-class, with a sail similar to that of the Alfa-class. This research and development platform may have been used for testing of hull forms, propulsors and boundary layer control techniques. After the development of the first nuclear-powered submarine, Soviet engineers experimented with tactical and technical characteristics relating to speed to improve sonar performance and noise levels. The highest priority was speed, and the Soviets wanted to control sonar performance and noise by influencing the boundary layer with a polymer solution. The need for reduction in frictional drag has long existed.
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