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第174章 至沛南刘云造船(1 / 2)

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刘云至龙亢,坐镇沛南的典韦早就已经得了军令在此等候。

刘云问了他整个沛南数县的情况,典韦不知道委婉,直接汇报道:

“主公!沛南大户几乎被杨奉韩暹全部掳掠了一遍,大军所过之处,坞堡破碎,鸡犬不留。沛南十县,三十万口,今岁挨不过冬季,怕是要大半成为流民!”

“如此严重?李伯平,梁郡南下的三十万石粮,应已然快到了吧?”

刘云可以理解为何历史记录,易子而食,人肉当饭了。

李宣道:“应是快了,不过运粮艰难,陆路难走,若是水路能通,便可一二日抵达。”

对于船坞的建造,刘云更为急切了。

也就是在刘云抵达龙亢的第二日,陈到终于将三十万石粮食运至龙亢。

“陈到,麻烦你再辛苦一趟,领军回一趟梁郡,再取粮三十万石,沛南十县,每县分粮三万石,用于救济县民。”

“诺!”

陈到并未停留,当日便又急急拿着刘云的文书,向梁郡取粮。

随后,刘云便开始与李宣规划船坞和城池的修建之事。

密室之内,刘云和李宣,并有十多个工匠正团团围坐,刘云面前的桌面上,摆放着一叠厚厚的图纸。

而图纸之上,还摆放着一艘船的模型。

这艘船模型,并没有船桨,而是两侧各有一个大大的水轮,这水轮比船弦都高出三分之一个轮直径,正是刘云提出的明轮船。

此时没有蒸汽机,刘云也没有那个能力发明蒸汽机,毕竟他文化不高,但他却知道,最早的轮船就是这个样子。

经过了三年的努力,这些技术骨干终于在刘云的秘密授意之下,研究出了明轮船的图纸,并于梁郡造出小型样板。不过因为刘云觉得,还不是此物出世良机,所以又捣毁了。

这种明轮船,却是在船的两侧装上木质页轮,通过齿轮连接船的甲板两侧,然后人工在甲板下踩踏而转动明轮,使船前进。

明轮推进器要比篙、桨、橹等推进工具前进一步,主要特点是可以连续运转,把人力转化为船舶推进力,使船舶前进。

但是,它结构笨重、效率低,特别是遇到风浪,明轮叶片部分或全部露出水面,使船舶不能稳定航行。

而且,明轮的叶片使用时易损坏。明轮转动时有一半叶在空中转动,不仅增加了船的宽度和航行时的阻力,而且当它在码头上停靠时,与两旁的轮船很容易发生碰撞,既影响自己的安全行驶,也存在着擦伤别的轮船的可能性。

另外,如果水草一类的缠绕物绞住明轮的叶片或轴,明轮就有失去转动的可能。

正是明轮推进器的缺点,到了19世纪60年代,明轮船被装着螺旋桨的先进蒸汽船淘汰。

但是此时是什么时候?最不值钱的就是人力,而且这种明轮船,再怎么样,人家也带着一个轮字,比起浆船,那就先进多了。

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