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第四十九章 尼米茨的反击(3)

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威武雄壮的钢铁巨龙并未给坐镇富兰克林号航空母舰舰桥的尼米茨上将带去安定感,他的眉头依然紧锁且心神不定。龙腾小说ltxsba.com

几个小时前,他接连收到了两份电报:第一份是运输部队司令官休伊特海军中将发来的,通报疑似发现德国潜艇的消息。

尼米茨知道休伊特是个很谨慎的将领,他说疑似,应该有70%以上的概率。这段时期以来,在加勒比海、中美洲海域和东海岸一直有德国潜艇活动,休伊特的判断估计有九成可能性。

海军单独成立了反潜警备司令部,预计这片海域至少有不少于20艘德国潜艇活动,不但数量逐步增多且属于性能较先进的新潜艇——速度快得超越美军认知。

美国刚刚参战时,德国潜艇曾经在东海岸进行过声势浩大的潜艇战,这是德国潜艇的第一个高潮,刚刚参战的美国在反潜方面十分笨拙,既没有护航体系,也没有灯火管制,甚至连Z字型反潜路线也不走,白白损失了不少货轮,随着美军强化反潜与护航体系并注重自身隐蔽后,无谓损失逐渐减少,捞不到油水的德国潜艇艇长将重心转回北大西洋方向。

德国占领亚速尔后,U艇进入了第二个活跃期,双方一直在东海岸外围展开拉锯战,但整体而言,德军潜艇主要作战使命还是为了切断北大西洋航运,对东海岸与加勒比海地区以骚扰、侦查为主,虽令人讨厌却不难受。

北大西洋绞杀战标志着U艇部队进入第三个活跃期,这一次以XXI级潜艇批量服役为标志,特别是纽芬兰战役期间,德国潜艇为德国海军立下了汗马功劳,缴获的百万吨级货轮就有潜艇一份大功。

美国清楚地知道德国投入了新潜艇,且数量越来越多,虽然也击沉过几艘,但由于一直没完整俘获或找到潜艇残骸,专家们绞尽脑汁都弄不清楚为什么这种新的德国潜艇能跑这么快。本来自我感觉美国潜艇技术也不算落后,但目前一比较之后,远远落于下风。

金上将为此已发过好几次火:先进潜艇本方造不出来也就罢了,连敌人的工作原理都没弄清楚,岂不让人笑掉大牙?

骂归骂,弄不清楚就是弄不清楚,再逼也没有办法。再说美国海军弄不清楚的东西多了,也不差潜艇一样——海军明明知道德国、日本有一种威力特别巨大、速度特别快、隐蔽性还好的鱼雷,但到目前为止,依然不能完整解释其工作原理。有部分专家推测是氧气动力鱼雷,但遭到更多人反驳——因为美国不是没尝试过氧气鱼雷,无一不以失败而告终。

在美国的情报通报体系中有超级鱼雷、超级潜艇的说法,专门用于应对无法解释的德国装备。

随着英国进入停战倒计时,美国即将迎来U艇攻击的第四个活跃期:邓尼茨对潜艇部队进行了大刀阔斧的调整,一口气停掉了300多艘VII级、VIX级潜艇服役,把上面服役的潜艇官兵部分转入驱逐舰,部分转入先进的XXI级潜艇服役,甚至连更先进的XXIII级潜艇也已开发成功,准备批量新建。

23型是在21型潜艇基础上改良而成的,标准排水量扩大为2300吨,采用MAN公司3台共计9000匹马力的柴油机,拥有前6后4共计10个鱼雷发射管,最高水面速度20.4节,最高潜航速度19.2节,11节状态时续航力1.8万海里。

这不只是指标上的进一步改善,最大的改进是开始向现代潜艇靠拢——提速降噪。

3台3000匹马力的MAN公司低速柴油机驱动着2轴5叶倾斜螺旋桨——这是现有技术条件下最先进的螺旋桨。螺旋桨快速转动时形成的空泡是噪音加大的罪魁祸首,因此减少空泡是降低噪音根本途径,德国科学家已知道奇数叶片比偶数叶片更不容易产生气泡,而且叶数越多,气泡越小,但叶数越多加工难度就越大。

霍夫曼知道7叶大侧倾螺旋桨要等5轴联动数控机床研发成功后才有机会搞出来——当初历史上苏联一直搞不出来,直到东芝卖给他们巴统管制机床后才加工处理。现在德国潜艇螺旋桨的加工水平是当之无愧的世界第一。

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