第207章 关刀就是黑科技(第一更,求订阅)(2 / 2)

自从购进“大东方号”以来,那艘巨无霸确实在移民中发挥了极其重要的作用——平均每四个月可以为南华带来多达4万移民!

但,这只是理论。

因为明轮的结构复杂,受风浪的影响大,如果船遇到风浪的话,会像鸭子一样左摇右摆,空气和水密度相差800倍,庞大的明轮在其中进进出出,很容易损坏。再加上“大东方号”使用蒸汽机可靠性一般,导致每次返航后都要进入船坞维修一个月。

这不,这次返航归来后又进了船坞。

“可是,主公,这么大的船,仅仅只用一个螺旋桨,能带得动吗?”

梁明伟有些担心的说道。

“虽然咱们的船都换了新式的螺旋桨,效率提高了很多,但是我担心一具螺旋桨不一定能带得动它。”

其实“大东方号”本身也有螺旋桨,它既有船舷两侧的明轮,也有尾部的螺旋桨,它装有当时世界上最大的螺旋桨,它的直径有7.3米,转速每分种50转,不过那个螺旋桨的叶片几乎等于两块“铁片”,效率当然不可能高到什么地方去。

在科学技术发展过程中,许多机械装置的性能在人们还不太清楚的时候,就已经广泛使用了。但是人们在不完全理解它的物理规律和没有完整的理论分析以前,这些装置很难达到它的最佳性能。螺旋桨也不例外,在1860年,虽然它在海船上已经得到应用,但是螺旋桨的进步,不过只是依靠经验积累和专家们的直观推理。

就眼下来说螺旋桨的效率尽管已经把明轮甩在身后,但应用在大方东号上,肯定还是有所不足。

“靠原本的螺旋桨肯定不行,要新型的螺旋桨!”

朱先海直接了当的说道。

“新型的?主公,咱们的螺旋桨的效率已经很高了……”

在到嘴边,梁明伟惊喜道。

“难道主公又设计出了新型浆叶?”

其实南华之前使用的螺旋桨,也是朱先海设计的,不过也就是对原有的螺旋桨稍加一点改进而已,不过即便是如此,也大幅度降低了螺旋桨的振动,提高了船只的速度。

“见过关刀吗?”

朱先海问道。

“关刀?”

“对,就是“偃月刀”,我把螺旋桨的桨叶轮廓做成了关刀的外型……”

朱先海提到“关刀桨”,是华夏在螺旋桨技术发展中的一大创造。它是二十世纪在六零年代,广州文冲船厂一位名叫周挺的师傅他根据自己几十年制做螺旋桨的经验,把螺旋桨的桨叶轮廓做成三国演义中关公的82斤重大刀的式样,他形象地叫它“关刀桨”。它不仅提高了船的航速,而且螺旋浆的振动也会大大地减弱。为了改造“大东方号”,朱先海特意选择了“关刀桨”。在这个时代他绝对是妥妥的黑科技。

“我估计换上新式的“关刀桨”后,仅只凭一个螺旋桨,差不多就能满足它的需求,不过在要先在其它船上进行试验……”

一一道出自己的想法后,朱先海看了一眼梁明伟手中的图纸筒,问道。

“咦?你这里装的是什么?”

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