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第七百九十二章 直挂云帆济沧海

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在他心里,完全没有赌赢的喜悦和庆幸,只有失望和唏嘘……

若是当真有那种可以逆风航行的战船,就完全可以摆脱海船航行对于季风的依赖。自古以来,船舶在海上航行,都是依靠季风才能达到远航的目的。

在没有机械动力的古代,帆船远航主要依靠季风和洋流的变化,其中季风是决定性的因素。“船舶去以十一月、十二月,就北风;来以五月、六月,就南风。”无论去往南洋或者从江南出海前往高句丽、倭国,都要依靠季风提供动力。若是错过风季,那就只能再等一年……

可若是有了能迎风航行的海船,一年四季皆可南来北往,对于商船来说等于一年可以往返高句丽和倭国数次,这其中所带来的利润几乎就是十几倍甚至是几十倍的增加!

而对于水师战船来说,意味着随时随地都可以出海剿灭海盗!

刘仁愿心中无比失望,啧啧嘴,埋怨道:“说的跟真的似的,差点将某给骗了……”

话音未落,船身猛然一震!

紧接着,刘仁愿就感到身下的战船如同被狠狠抽了一鞭子的战马一般四蹄狂奔,陡然间就将速度提升至极限!

刘仁愿张大嘴巴,目瞪口呆的看着身下的战船在宽阔的江面上以一种诡异的轨迹画着“之”字向前航行,越跑越快,越跑越快,势如奔马!

刘仁愿才意识的说道:“娘咧……咳咳咳!”

却是被一口江风灌入口中,差点呛到背过气去!

苏定方也傻了眼,真的能逆风航行啊……

刘仁轨一脸振奋,裴行俭却是已经和席君买大呼道:“迎风!迎风!果然能够迎风航行!哈哈哈,大总管是天才呀,真的能迎风航行!”

苏定方狠狠一拳砸在围栏上,长长的吁出口气,江风迎面吹来,满面清爽,衣衫烈烈,意气飞扬!

有此利器,何愁不能纵横七海?

刘仁愿已经一头钻进瞭望台下的舱室,一把扯住正跟房俊说话的梁仁方,兴奋得像个孩子一样大呼小叫道:“真的能迎风航行啊!啊哈哈!没说的,某彻底服了,心服口服!今晚当亲自烹烤全羊,愿赌服输,哈哈!”

其实严格说来,这并不是真正意义上的迎风航行。

根据空气动力学原理,流体速度增加,压力就会减低。空气要绕过向外弯曲的帆面,必须加快速度,于是压力减小,产生吸力,把船帆扯向一边。船帆背风一面因压力降低而产生的吸力相当大,可比迎风一面把帆推动的力量大一倍。

风在帆两侧产生的吸力和推力,使船侧向行驶;但船底自有装置阻止船身侧向行驶,于是,风力分解为两个分力,一个分力推动帆船向前行驶,另一个分力则使船向背风一面倾侧,不过这样的力度显然不至于使得庞大的船身倾覆……

准确的说,应该是侧风航行。

不过这完全不是问题!

只要能在迎风的时候保持航速甚至稍有加快,管他是迎风还是逆风?

梁仁方笑道:“刘校尉可莫要折煞在下,无论是此船的构造,亦或是那些三角帆的设计,都是出自大总管之手,你若是想要烹烤全羊,应当献给大总管才是!”

刘仁愿大笑道:“没问题!今晚某豁出去了,就当一回厨子,让各位都常常雕阴烤羊的味道!大总管,您可真是神了!这船的速度简直太快了,先前梁主事说从莱州出发至辽东一个来回只是七八个时辰,某还以为他是吹牛,现在看来是确有其事,真是让某涨了见识了!”

房俊笑道:“这就激动了?这种船确实很快,但是本侯更看重它的灵活性和操作性,非常适合作为战船。若是单论速度,比它快的还有呢!”

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