$floatcFile = "/www/wwwroot/xin_floatAdc.txt"; 末世鼠辈(第十个名字)_027 钢板弩(2 / 2)_末世鼠辈最新章节免费阅读无弹窗_新笔趣阁

027 钢板弩(2 / 2)

末世鼠辈 第十个名字 1361 字 2022-03-26

弓子板中间本来就有个固定螺栓用的孔,下面再钻个孔,用两根12厘米的长螺栓固定在木方子顶端,妥妥的成型了。

弩机就用切下来的弓子板废料凑合,拿角磨机磨一磨,啥模样不模样的,只要小时候做过火柴枪、钢珠枪、喷子,都知道弩机怎么弄。在弩身上穿两根细螺栓固定在侧面,能挂住弓弦即可,弹簧都不用。

先试试弩臂的效果再说细节、轻量化和人体工程学,否则折腾半天,轻便、美观、实用了,结果弩臂效果不好,前面的全是无用功。

“绷……嘡……嗡……”弩箭是最简单的,洪涛直接拿了根不锈钢筷子磨尖放上去,站在五米外,对着院门扣动了弩机。

“……洗洗睡吧,明早再说!”筷子准确的钉在了院门上,至于说瞄准啥的,那是细节,洪涛主要想看的是弩臂的拉力够不够。

当他抓着筷子尾部,脚蹬院门,从一只手变成两只手,依旧没有拔动分毫之后,弩臂的拉力测试基本就算过关了。筷子至少扎进去两寸,把包着白铁皮的松木板都贯穿了,这个劲头儿击穿头骨毫无问题。

老天爷仿佛知道洪涛要干活,所以后半夜下起了小雨,下到凌晨不光没停还大了起来。既然老天爷都不想让自己出去,那洪涛索性就顺应一次天意,踏踏实实的在天棚下面继续完善钢板弩。

经过昨晚的试射,弩臂的拉力足够,但有个小问题来了,这个拉力自己踩着弩臂双手才能拉动,初秋和张柯咋用呢,她们俩的力气肯定不够。

这时候有两个解决办法,一个是用偏心轮组,一个是用滑轮组。最终洪涛选择了滑轮组,虽然偏心轮组更有效,可是它也更复杂,不如滑轮好找。

弩臂两端各焊上一个滑轮,在弩身靠前三分之一的位置,一边也装上个滑轮,形成左右各一套定滑轮和动滑轮组。

初中物理老师教导我们说,定滑轮不省力,但可以改变拉力方向。弩身两侧的滑轮就是定滑轮,它把弓弦向后拉的方向给改了,变成弩臂滑轮向着定滑轮的方向。

而弩臂两端的滑轮就是动滑轮,初中物理老师又说了,动滑轮不能改变力的方向,但它能省力。省多少呢?一个动滑轮省一半!

知识这玩意很奇妙对吧,简单的四个小滑轮,几块钱的玩意,就能让一把可以射穿两寸木板的强弩,变成连十多岁小孩都能拉开的玩具!

张柯确实能拉开,也能端起来发射。不过这个玩意还是太糙了,没有望山不好掌握射击距离,严重影响了准确度。

下面就全是精细活儿了,找来门帘里的磁石条镶嵌在弩身上的凹槽里吸住弩箭,防止因为动作掉落。在弩身上开槽增加复位弹簧,进一步完善弩机。

磨圆磨光弩身木料,在不影响弩臂拉力的情况下做几个镂空处理,尽量减轻整体重量、调整重心。通过多次试射,大概找到落点散步,做出简单的望山……

雨都停了,中午饭也吃完了,洪涛还在天棚下面忙活呢。光有弩不够,还得有合适的弩箭。不锈钢筷子就那么两副,还不能被磁石吸住,没啥用。

以前钓鱼时在野外扎帐篷用的地钉倒是不错,原装的当然不灵,那些地钉就是凑合,又短又软,碰上碎石和泥土地面根本固定不住帐篷。

洪涛用的地钉都是找小加工厂订做的,半米长的结构钢,比筷子稍粗点,只要一分为二,再把圆头磨成三棱锥形,破甲能力还得翻倍!

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