第二十八章、古代科技(2 / 2)

汉魏文魁 赤军 0 字 2021-04-06

还在去岁,当计划荆州方面水陆并进,以向巴中的时候,鲁肃便写信给是勋,说我的水师纵横江上,世无可敌,但有一点,要打巴蜀就必须逆水而上,从秭归到鱼复,很多江段只能拖纤前行,一旦遭到蜀贼骚扰,难以拖纤,即便如山巨舰赶不到战场,那也无济于事啊。光有烈风巨弩有啥用?总得抵近了才能射击吧。 </p>

是勋得信,也感头痛,于是便跟诸葛亮商议,不如把马德衡派去水师中,让他研究一下有何改进舟船,使便于逆水航行之法吧。马钧得了此命,倒是挺欢欣鼓舞,但觉吾此斫轮手,又得用武地也,赶紧就快马赶去了彭蠡。 </p>

其实舟船的研发和改装,绝非一朝一夕之功,若然真的去岁便即伐蜀,说不定鲁肃水师仍然派不上多大用场,会被甘宁硬生生堵在瞿塘峡以东。可是既然延后了整整一年,马德衡也不是吃素的,终于被他搞了令人瞠目结舌的新花样出来。 </p>

首先,马钧发明了“轮船”。 </p>

这里所说的“轮船”,是指原始意义上的有轮之船,又称“明轮车船”,在原本历史上要在五百多年以后才会出现,到了宋代始得大行——钟相、杨幺即驾车船横行洞庭,后来宋军车船又在采石堵住过完颜亮的南侵大军。这种机械的原理倒是非常简单,即在船只外侧安装数个巨大的木轮,通过齿轮和皮带传动,以人力踩踏旋转,划水前行。马钧造此“轮船”,还是受到了他老爹当年在乡中所制水车的启发。 </p>

踩踏船轮比之划桨,人力未必俭省,但动力更为强劲,而且方便统一使力。马钧造出了这种轮船……还是叫车船吧,便即于江上试验,果然逆水仍可疾行,鲁肃不禁抚掌大喜。然而把这种车船运到秭归附近,后世的西陵峡上试验,却发现动力仍嫌不足——逆水再也快不起来了,慢得跟乌龟爬一般。 </p>

马钧筹思良久,突然又从新式的礟车上得到了启发——经过他和诸葛亮改良的新式礟车,不再用人力拖拽稍杆了,而代之以绞盘。于是马钧就在船上各轮内侧多置一绞盘,横以四张巨弓,当绞盘摇起,便即拉开巨弓,一旦松开绞盘,则弓臂所产生的动能足可驱动明轮转动,比五十人踩踏还要大力。于是,受是勋的影响,但完全没有是勋指引发向,完全偏离原本历史的崭新的“黑科技”就此出笼。 </p>

如今鲁肃所率那十多条巨大的楼船,就全都既装了明轮,又装了绞盘,启航时便即摇起绞盘,等到松开纤索,放开绞盘,明轮疾转,当即劈波斩浪,直向鱼复城下驶去。有了绞盘助力,再踩明轮,真正是轻松无比、事半功倍,数十里的水路转瞬即过。 </p>

当然啦,只有这些大楼船才能装设如此复杂而沉重的装备,其余中、小船只,要么只能踩踏明轮,要么连明轮都安不上,而只能摇桨,速度根本快不起来,只好远远地在后面跟着——其中部分小船因为动力不足,转眼间便即倾覆了,或者被迫倒退,其疾如箭地便折返回了秭归。 </p>

只是光前面那十多条大楼船也已经很恐怖了,船上密布箭橹,火药箭、焙烙罐尽皆齐全,此外尚置拍杆,船头设一具烈风连弩。甘宁时在鱼复城中,使部将詹晏统领水师,双方甫一接触,蜀船便即大溃,三成倾覆,余皆惊骇而走——魏军倒也折损了四条楼船,基本上都是明轮转动太速,最终散架所造成的自伤。 </p>

余船拢岸,鲁肃麾下骁将丁奉年方弱冠,双手各舞一长刀,当先跳纵而上,赶杀蜀军守江者。鲁子敬下令,说既已下锭,除留极少数人守船外,其余人等——包括踩踏明轮的——都必须执械登陆,但得一首,即授民爵!重赏之下,人皆踊跃,很快便夺占了鱼复城外的港口。 </p>

甘宁闻报大惊,急忙率军出城来战。这边鲁肃才刚夺取港口,尚未来得及筑垒、列阵,便遭蜀军冲击。他麾下大群力夫本就缺乏战阵训练,方才跟随丁奉打顺风仗颇显勇略,真等踢中铁板,当即四散,反倒冲乱了自家队伍。丁奉保着鲁肃狼狈而走,逃归船上,甘宁还想跳帮夺船,就听鲁子敬一声令下:“施弩!” </p>

每条楼船的船首都设有一架烈风连弩,弩身是固定的,但弩臂还可以左右各做九十度的回旋,早就歪过来瞄准着岸上啦。于是十数具连弩一时激发,蜀军当先者多被洞穿,就连甘兴霸本人也险险中矢,被迫挥师后退。 </p>

于是就在连弩的遮护下,魏军于舟上重整队列,再次放下跳板,一行行排列整齐,二度登岸。随即也不走远,就背靠舰船树木为篱,开始搭建营垒。鲁肃这回不敢下船去了,但是吩咐,小心地拆下一半连弩往岸上运,然后即以连弩杂以步弓,尝试一点点地把蜀人驱远,好彻底占据港口。 </p>

其间甘宁率军连冲了两次,都被敌弩逼退,不禁气得暴跳如雷。他跟王平商量,说敌械甚锐,难以遽破,只能暂且熬到天黑,然后我再率数百敢死精锐趁夜前去斫营。王平说此计甚妙,但:“将军乃巴军主将,岂可轻动?平愿往也!”</p>

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