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第218章 你看那是什么(1 / 2)

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说到这里,李国助看了看颜思齐的脸,见后者若有所思,便继续道,

“从增强防御的角度看,永明要塞北边的防御压力,其实是不如南边和东边的。”

“因为最有可能威胁到我们的建奴,是在永明城的西南方。”

“他们要来攻击我们,不太可能绕远路,并翻山越岭,从北边攻打要塞,”

“而是会趁冬季海面结冰时,沿豆满江进入西边的沿海一带,”

“再由那里借助冰面来攻击要塞的南侧和东侧。”

“所以近几年新增的人,应该优先投入永明要塞城墙的改建工程中来,”

“确保城墙能以最快的速度完成改建,才能保障我们的安全。”

“哎呀!”

颜思齐如梦初醒,

“被你这么一说,咱们去年就不该先改造北边的城墙啊,”

“就应该先改造南边和东边的城墙才对!”

“无妨。”

李国助淡定地道,

“其实在我们这里的人数超过十万,并开始向西边沿海一带发展之前,”

“建奴是不太可能得知我们的存在的,”

“即使知道了,他们也不太可能千里迢迢地挥师来攻打我们。”

“特别是现在,他们已经跟大明开战,就更不可能顾得上来打我们。”

“退一万步说,就算他们会来,咱们这木城墙也未必就顶不住。”

“虽说咱们这木城墙是空心的,可单论墙壳就足有一尺五寸六分厚,”

“而且墙内的空间还堆满了装满泥土的箩筐,”

“别说建奴没有大炮,就算有大炮,这千里迢迢,翻山越岭地运过来也是够呛。”

“即使让他们运过来了,”

“这厚厚的木墙壳和里面盛满土的箩筐也不是中小型火炮能轻易轰开的。”

“颜叔大可不必担心。”

李国助当初对李旦说,永明要塞木城墙的墙壳是按西方战舰的标准所建,绝无半分夸大。

明代营造尺的一尺五寸六分,换算成现代的单位就是50厘米。

欧洲1级风帆战列舰的船壳也未必能达到这个厚度,弹飞炮弹的例子却并不鲜见。

可见这个厚度的木制墙壳就算是舰炮也不见得能轻易轰开,

就更别提野战中使用的那些12磅上下的中小型火炮了。

别说是24磅以上的舰炮,就是常见的6磅红夷大炮,

你让建奴从赫图阿拉跨越长白山崎岖的山路运到这里来试试。

至于木制城墙被建成空心的,一方面是为了节省木材,加速工期,

另一方面也是为了方便将来改建成夯土包砖城墙。

因为空心的木城墙就相当于是版筑城墙的木制模具。

可以直接在城墙内部对泥土进行夯筑操作。

至于城墙里堆放的那些装满泥土的箩筐,

早就是野战防御工事中,用于防炮的常用手段。

别说外面有那么厚的木制墙壳,就算没有这墙壳,

火炮也几乎不可能轰开这种装满泥土的箩筐。

别说是17世纪的实心炮弹,就是现代的榴弹炮也未必能轰开。

美国陆军有一种用于构筑临时野战营地防护墙的石笼网,

叫做艾斯科防爆墙,就是榴弹炮也无法轻易轰开的。

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