美国海军下一代战略核潜艇：排水量超过2万吨，只携带16枚洲际核弹，单价50亿美元。相比之下，俄亥俄的排水量只有1万多，携带24发洲际核弹-----为啥变重了，带弹量反而少了？

                               
登录/注册后可看大图

http://news.usni.org/2014/04/07/ ... -replacement-boomer


The more than 20,000 ton submarine will be the largest submarine the Navy has ever constructed — about half the size of the Soviet designed 45,000-ton Typhoon boomers and roughly the same tonnage as the Russian Navy’s new Borey-class (Project 955A) SSBNs.

In cooperation with the U.K. Royal Navy Successor-class of SSBNS, ORP boats will field 16 missile tubes armed with Trident II D5 submarine launched ballistic missiles (SLBMs).