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Juliett-class submarine
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===Propulsion and performance=== The Juliett class is powered by a [[Submarine#Diesel–electric transmission|diesel-electric system]] that consists of two {{convert|4000|PS|adj=on|sp=us|lk=on}} 1D43 [[diesel engine]]s and a pair of {{cvt|3000|PS}} MG-141 [[electric motor]]s for cruising on the surface. Two additional {{cvt|200|PS}} electric motors are intended for slow speeds underwater and are powered by four banks of [[lead-acid battery]] cells that are recharged by a {{cvt|1000|PS}} 1DL42 [[diesel generator]]. The boats are fitted with a retractable [[Submarine snorkel|snorkel]] to allow the diesel engines to operate while underwater.<ref name=fp>Hampshire, p. 24</ref> On the surface, the submarines have a maximum speed of {{convert|16|kn|lk=in}}. Using their diesel-electric system while snorkeling gives the Julietts a range of {{convert|18000|nmi|lk=in}} at {{convert|7|kn}}. Using just the electric motors underwater, they have a maximum range of {{cvt|810|nmi}} at {{convert|2.74|kn}}. Their best submerged speed on electric motors is {{convert|18|kn}}, although it reduces their range to {{cvt|27.8|nmi}}. They could carry enough supplies for 90 days of operation.<ref name=p1>Pavlov, p. 60</ref><ref>Friedman, p. 402</ref>
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