武备院的铁锈味混着硫磺气息扑面而来,林璃的智能手环发出轻鸣,视网膜上投出 **「火铳有效射程:27 步」** 的红色警示 —— 这比她在陈留县改良的燧发枪,足足短了十五步。
"当心!" 清越的男声从头顶传来。林璃本能侧身,只见鎏金火铳的枪托擦着肩头砸在砖地上,枪管上的蟠龙纹已被磨得模糊。持铳者身着青缎箭衣,腰间玉坠刻着双鹤纹 —— 正是十三贝勒胤祥。
"林主事受惊了。" 胤祥收铳抱拳,袖口露出半截磁石打磨的枪管,"本贝勒在试新铸的枪管," 他的手指划过粗糙的膛线,"可惜这铁料," 声音带着懊恼,"总卡火药用料。"
林璃的智能手环已扫过枪管成分:「含硫量超标 19%,杂质率 37%」。她取出琉璃显微镜,载玻片上的金属分子在蓝光中显形:"十三爷可知," 指向晶界处的硫化物,"这些杂质," 声音清亮,"让弹丸速度," 腕间星图与枪管共振,"慢了三成。"
胤祥的瞳孔骤缩,他从未想过有人能把火铳问题看得如此透彻。"林主事对火器也有研究?" 他的目光落在林璃腕间,"听闻你改良的护目镜," 指向西北方向,"让四哥的军队," 声音带着赞赏,"在沙暴中占了先手。"
林璃点头,智能手环投射出燧发枪的三维模型:"璃在格致学堂开了《火器弹道学》," 她的指尖划过膛线,"用星落山矿石的超导性," 指向枪管,"能让火药燃烧更均匀," 忽然轻笑,"十三爷手中的火铳," 望向武备院的铸铁炉,"若换钛铁矿枪管," 腕间星图骤然明亮,"射程可破百步。"
胤祥的手指无意识摩挲着枪托,想起去年西北之战,因火铳射程不足,眼睁睁看着准噶尔狼骑逼近。"愿闻其详。" 他忽然拉住林璃,走向堆满火铳零件的工作台,"本贝勒试过十二种枪管," 指向生锈的铜铳,"从红夷大炮到鸟铳," 声音带着不甘,"始终不及西洋火器。"
"问题不在形制," 林璃拆解一支火铳,智能手环扫描膛内结构,"在膛线 ——" 她取出琉璃三角尺,"螺旋角度不对," 指向枪管内壁,"弹丸旋转不稳," 忽然从袖中取出改良的燧发枪,"这是璃用磁石校准的枪管," 递给胤祥,"十三爷试试。"
胤祥接过枪的瞬间,腕间玉坠与枪管磁石共鸣,竟在地面投出模糊的弹道轨迹。他眼睛一亮,举枪对准百步外的靶心,扣动扳机。铅弹擦着靶边飞过,却比寻常火铳远了十步。
"还差准头。" 林璃取出琉璃瞄准镜,镜片上的北斗纹与磁石枪管共振,"用星象定位原理," 她的指尖划过镜片,"把北极星方位," 腕间星图同步转动,"刻进瞄准标尺。"
胤祥忽然想起钦天监的浑天仪,那些复杂的星位计算,竟能用到火器上。"林主事是说," 他的声音带着兴奋,"让火铳," 指向瞄准镜,"像观象台的浑天仪一样," 眼中闪过火花,"跟着星星走?"
"正是。" 林璃点头,智能手环显示 **「磁石枪管稳定性提升 65%」**,"星落山矿石的磁导性," 她的指尖划过枪管,"能让火药燃气," 腕间星图与枪管共鸣,"均匀推动弹丸," 忽然轻笑,"十三爷可曾想过," 指向武备院的火器,"让每支火铳," 声音坚定,"都成为会认星星的铁家伙?"
胤祥忽然单膝跪地,玉坠在砖面磕出轻响:"请林主事教我!" 他的目光扫过工作台上的残次品,"西北的弟兄们," 声音低沉,"等不起了。"
林璃慌忙扶起,智能手环却在此时显示 **「时空共振物质异常:武备院地下 3 丈,狼头纹火雷残留」**。她的指尖划过胤祥的枪管,忽然想起索党曾在火器营投放的槐叶毒:"十三爷若信得过," 她的声音压低,"璃可调用格致工坊的匠人," 指向窗外,"用磁石探伤法," 腕间星图与武备院地基共振,"排查所有火器隐患。"
胤祥的瞳孔骤缩,他当然知道索党对火器的破坏。"成交!" 他忽然解下玉坠,塞进林璃手中,"这是四哥送的磁石坠," 指向坠上双鹤,"能连通西北军的护目镜," 声音带着决然,"今后武备院的火器改良," 望向铸铁炉,"全凭林主事调度。"
当日申时,林璃的工匠队带着磁石探伤仪涌入武备院。李柱的铜钥匙在腰间叮当作响,钛铁探杆插入枪管的瞬间,智能手环显示 **「槐叶毒残留:13 处」**。"狗日的索党!" 他啐掉嘴角的草茎,"在枪管里," 指向探伤仪,"掺了让火药哑火的铅粉!"
胤祥的佩刀突然出鞘,刀刃映着窗外的狼头纹阴影:"把这些毒铳," 声音冷如冰,"改造成咱们的试验品。" 他忽然望向林璃,"本贝勒听说," 指向她腕间,"你在陈留县用鸭群治蝗," 声音带着期许,"能不能," 指向探伤仪,"也给火铳," 眼中闪过微光,"找群 ' 铁鸭子 '?"
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