第七章 问询(2 / 2)

南明汹涌 杜春秋 1587 字 2022-04-27

李存真回答:“有的。这个其实也没什么难的,不过就是在火铳枪管内壁划几道凹槽而已。”

“有这几道凹槽便能指哪打哪了吗?”

李存真深施一礼回答:“不敢欺瞒国姓爷,指哪打哪确实是夸大其词了。这几道凹槽其实就是膛线,泰西语发音为来复,所以便称这种枪为来复枪,也可称其为线膛枪。

这枪不是什么新鲜东西,两百五十年前在泰西的德国就已经被发明出来了,那时候应该还是太祖皇爷时期。到了成化的时候,意大利人发明了螺旋膛线。有了膛线铳子打得自然就准了。”

李存真所讲的东西让郑成功颇感新奇,问道:“为何有了膛线便打得准了?”

听国姓爷这么问,甘辉等一种明郑将领竖起了耳朵。李存真见显摆的时刻到了,便一本正经地回答道:“有了膛线确实比滑膛枪打得准些。我们现在用的枪都是没有膛线的火枪,内壁十分光滑,故而称作滑膛枪。当药池里的火药引燃推动铅弹在枪膛内滑行的时候,由于火枪内壁十分光滑,所以弹丸其实是跳动的。每一把火铳,每一次发射的时候弹丸在枪管里面跳动的方式都不相同,这一次弹丸出枪管的时候如果恰好是往上跳,弹丸飞出枪膛之后就会往上走,下一次如果是往下跳飞出枪膛之后便往下走。所以,滑膛枪一般六十步内勉强有准头,六十步以外就算命中也肯定是蒙的,八十步以外若还能打中,那可真是神仙保佑了。线膛枪便能克服滑膛枪的劣势,因为有膛线,弹丸在枪管内无法随意跳动必须按照膛线的轨迹运行,出枪管的一瞬间也是向前飞的,所以线膛枪打得更准。”

郑成功听罢大喜说道:“没想到竟然有如此神器……”

李存真见郑成功喜形于色,怕扫了他的兴致,没等郑成功把话说完便赶忙插嘴道:“这线膛枪虽然打得准可装填却不容易。”

听了李存真的话,郑成功立刻收了笑,问道:“莫不是还有困难?还请先生为我详说。”

“不敢当。要说这火枪最大的困难除了射速就是闭气。我们用滑膛枪的时候都是用纸张或丝绸包裹弹丸,这样一来不仅能保护枪膛,还能闭气,让弹丸飞得更远。可是线膛枪却是有膛线的,如果是圆形的弹丸,那无论如何也是得漏气的。如果弹丸做的大一些便塞不进去。”

“既然先生知道困难所在,那么想必已经找到了解决的办法。”

“想到了。我们可以在子弹上下功夫,按照枪的口径和膛线,做出带凸起的弹丸。就是让弹丸的凸起处与线膛枪内的凹槽正好吻合,如此一来便能解决这个问题。”

郑成功听罢拧着眉毛,摸着下巴说道:“如此一来,这弹丸制作费时费力,不过倒不打紧。怕是装填麻烦。”

李存真说道:“国姓爷目光如炬,睿智聪颖,一下子就点到了实质。带凸起的弹药制作起来太过麻烦。而且总是会有误差没办法严丝合缝,还是会漏气。而且装填非常费时往往滑膛枪打了两枪,线膛枪弹药还未装填完成。所以,我干脆就不在制作有凸起的弹丸,而是配发给士兵略大于枪口的软软的铅弹,再给士兵每人配发一个锤子,装填弹药的时候用锤子把弹药砸进枪管里去,这样就能很好地契合膛线了。如此,滑膛枪打两枪,线膛枪打一枪。”

郑成功听罢若有所思地点了点头。

李存真道:“等我回去便把来复枪也送过来给国姓爷把玩?”

其实,李存真已经有了初步成熟的线膛枪技术。这要感谢李存真那位学历史的师兄,没完没了地,日复一日给他普及历史知识。

李存真凭借自己对枪械发展史的了解,在穿越的第六年就研发出了线膛枪和相应的子弹。

线膛枪并不难造,只要在滑膛枪内壁拉出膛线就行。难的是拉出均匀的螺旋的膛线。

李存真一开始是让工匠手工在枪膛内刻膛线,无奈以失败告终。后来英国人以一千两银子的价格卖给了李存真刮刀法的专利。事实证明,刮刀法还算不错,能够均匀地在枪膛内刻出六条膛线。

再后来,天杀的英国人又以两千两银子的价格卖给了李存真一架手拉木制拉床,经过试验李存真终于发现了钩刀拉削法。

此后李军的线膛枪全部采用钩刀拉削法,每把线膛枪内刻有十二条均匀的螺旋膛线。

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