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Originally Posted by Rammstein0991
Dont the russians have a sub that looks almost like a complete ripoff of this thing?
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Not really, at least no more than the Tang class. The XXI was extensively analyzed and features implemented in others designs, but not copied wholesale like the Tu-4 was copied from the B-29. The Zulu for example had three shafts, a rear torpedo room and a conventional pressure hull (not an asymmetric "8" figure).