第539章:马钧巧思造水转
笔趣阁(biquge2345.com)更新快,无弹窗!
叶片吃水共同决定。水势你帮我算,吃水深度我试给你看。我们一个个参数定。“
卫玠运笔如飞,一边记录一边追问:“水轮半径?叶片数?入水角度?“
“半径七尺,叶片十二片,角度我还没定——“
“那就定十二个方案,“王朗在一旁接过话头,“每一度作为一个方案,算出每种方案的转速与力矩,取其中最优。“
马钧猛地抬头,看着这两个二十出头的年轻人,一时竟不知说什么。他做了一辈子器物,从来都是刀砍斧凿、边做边改。而今有人告诉他——可以先在纸上算清楚再做,这份冲击不亚于他当年第一次见到齿轮传动时的震动。
“好。“马钧重重拍了一下大腿,“那就从入水角度开始算!小周!把架子拆了重新搭,按照纸上算出来的方案走!“
整整三天三夜,工巧署的灯火没有熄过。卫玠和王朗轮流执笔,将每一步计算写在麻纸上。马钧则根据计算结果搭建试验模型,每一次拆装都精确到寸,不再凭手感估摸。第四日清晨,霜重露寒,新的水轮终于重新装入水渠。
马钧亲手提起闸门。
灞河支流的清水涌入渠道,冲上轮叶。这一次入水角度经过了精确计算,轮叶吃水深浅恰好落在最优区间。水轮先是微微一滞,随即缓缓转动起来,起初慢,渐渐加速,轴上的榉木齿轮发出低沉而均匀的嘎吱声,传递到第二轴、第三轴,最终牵动磨盘上方的石碓——那块两百斤重的青石碓头被稳稳托起、落下,砰地一声砸在石臼里,随即又是第二下。
砰。砰。砰。砰。
节奏均匀如鼓点,一下不多,一下不少。
马钧站在水轮旁,看着那架巨大的木头器械在清水的推动下不紧不慢地运转着,双手微微发抖。那十二片榆木轮叶沾着细碎的水珠,在晨光中闪闪发亮,每一次入水都精准地切入最优角度,不偏不倚。
“成了。“他嗓子哑得几乎说不出话。
裴秀不知何时已经站在了他身后,拍了拍他的肩膀:“德衡,你这不是成了一架水转磨盘——你这是在关中每一条河渠边上,都埋下了不吃饭不歇息的长工。“
消息传入太极殿时已是晌午。
刘封放下那封来自工巧署的奏报,奏报上字迹凌乱,显然是马钧亲手所写,末尾附了卫玠和王朗一同署名的计算方案。他看了三遍,将奏报递给身旁的杜预。
杜预看完,深吸一口气:“陛下,若此物能在关中推广,每处水磨可省二十个劳力。渭河两岸可设数百处,那就是数千人从磨坊里解放出来去开荒屯田。而冶铁作坊若装水转鼓风,炉温更稳,铁质更好,军器刀剑的产量至少翻一番。“
刘封没接话。他起身走到殿侧,那里摆着一张宽大的舆图,正是裴秀新制那幅关中全境图。他伸手指着渭河沿岸那些标明“可设水转“的位置,指尖在图上划出一道长长的弧线。
“杜卿,传旨下去——工巧署升格为工部下属‘水转司‘,马钧任司丞,秩六百石。调卫玠、王朗入司协助。另外,通令各州郡凡有渠堰之处,皆报水势实测至尚书省,由水转司统一规划设置。所需费用从今年盐铁专营结余中支取。“
杜预躬身领旨,转身刚走两步,又被叫住。
“还有——“刘封从袖中摸出那枚青铜打火机,在指尖翻了个面,“传话给马钧,让他别只盯着磨盘和冶炉。朕还想要一种靠水力拉动纺车的东西。布帛之事,也是国本。“
杜预走后,偏殿安静下来。刘封重新走到那幅关中舆图前,视线落在渭河沿岸那一排排代表水转可能位置的朱砂圈上。他想起穿越前在博物馆里见过的水转大纺车图片,三十六个锭子同时转动,一个水轮抵得上百名女工日夜不停。
步子要一步步走,但他知道脚下的方向是对的。
窗外的日头正西移,将太极殿的重檐影子拉得老长。刘封收回目光,低头看着掌心那枚已经磨得光滑锃亮的青铜打火机,轻轻将它扣在了舆图上——恰好按在渭河与灞河交汇处,那里有一个新的朱砂圈,旁边用小字标着:灞桥水转试制处。
(第539章完)
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