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第77章 三弓床弩(1 / 2)

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床子弩,又被称为三弓床弩和八牛弩。这些名字,其实就已经十分形象地体现了床子弩的基本特征!

床子弩,实际上是由唐代弩炮发展而来,宋代达到鼎盛时期,其主体为木制,在一张大大的弩床上,安置三张硬弓(两正一反),以滑轮技术构成合力,发射箭矢,威力十分强劲,大概相当于八头牛的力量!

床子弩上弦,采用绞盘驱动,需要三五十人,甚至上百人一齐发力;发射时,由一名床子弩士(大力士),以巨锤敲动扳机,方能发射!

据史料所载,床子弩的最高射程,可达七百步到一千步,折合2-4里远的距离,较近距离射击时,能把瓶口粗细的箭矢,深深嵌入城墙中,使攻城士兵攀爬,有了更多的着力点!

换句话说,床子弩这东西,一般是用来射城墙的,射人射马,那还不是摧枯拉朽?

床子弩最出名的战绩,便是在北宋年间,宋辽澶渊之战!当时宋军在城头上设置了床子弩,发射时正中辽军统帅,勇冠三军的萧挞凛,其威力,竟把他连人带马,钉死在了地上,拔都拔不下来!

辽军士兵眼见统帅如此惨死,惶恐不已,无心恋战,萧太后无奈便与北宋议和,最终双方达成了着名的澶渊之盟,开启了两国一百多年的和平蜜月期!

不过,宋代床子弩虽然威力强大,缺点也很明显。比如木质打造,不太结实,使用时容易发生断裂,伤及自己人;比如弩床沉重,不易搬运,发射时也需要耗费大量人力;还有发射效率也低得可怕,若是用于野战当中,根本来不及发动第二轮齐射,敌军就冲过来了!

刘纬作为一名深通历史的穿越者,自然对床子弩的优缺点了如指掌,因此他在设计之初,便考虑到要弥补这些劣势,使床子弩的性能更佳!

首先,刘纬改进了床子弩构件材质,虽依旧以木料为主,却以钢制小配件(比如角页等)和铁轧箍,加固了木梁等主要结构,关键部位,更是以金属部件取代,这样的床子弩,会更加结实耐用;

其次,刘纬结合了之前大型投石的设计理念,将床子弩设计成可以拆卸成几部分零件的构造,这样便更利于搬运!同时,他还将弩床设计成带轮的样式,成为弩车,这样行进后退也更加方便;

再有,刘纬借鉴了十字弩的原理,设计了一个金属齿轮联动箱,利用滑轮和轴承,大大降低了上弦所需力量,实际应用时,仅需三五个人发力,一齐摇动手柄,即可快速上弦装发;

最后,刘纬还别出心裁地设计了一种发射弩盒(类似缩小版的火箭弹发射架),上弦装发时,安装其上,打开发射口,随着击发,弓弦会带动推射版,猛然将十发箭矢一齐发射出去,简直就是刘氏版本的元戎弩机!

这里需要解释一下,所谓元戎弩机,其实就是大名鼎鼎的诸葛连弩,传说此弩可一击十发,发射时弩箭铺天盖地,是蜀军专门用来攻击曹魏骑兵所用的利器!

但是这种诸葛连弩在后来历史当中便消失了,且没有实物考古发现,也没有结构图纸,因此到目前为止,只能停留在传说当中。有些现代业余爱好者,曾经凭自己的智慧,试图复制诸葛连弩,但总是存在这样那样的问题,达不到传说中的那种效果。

就比如有一人,凭想象设计并制作了一种拉柄上弦,带有弩盒,可连续激发的“诸葛连弩”,射击速度快,效率堪比半自动步枪,可问题是,这并不是一击十发的效果,且准度、射程和杀伤力都得不到保障!

究其原因,可能是许多人一开始就搞错了,以为这诸葛连弩是单兵手持武器,其实只要稍加思考,您就能明白,这是不可能的!因为力量不够!

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