第七章 听风号·浮空船坞
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第七章听风号·浮空船坞(第1/2页)
东海郡维修站,末世第3年·仲春·第62天。
十四天。从拆到装,两人整整干了十四天。车间里到处是刨花、铁屑和机油,但“海燕“二号的骨架重新立了起来:左翼换上了寒铁加固件,翼梁上新铆的铆钉整齐得像两排棋子;蒙皮是两人联手敲出来的——陆铸负责下料、水镜负责成型,用敲铁皮的法子,一锤一锤把薄铝板敲出翼面的弧度,敲完一摸,误差在毫米以内。
水镜蹲在机头前,对着那台唯一完整的发动机发愁。这台涡轴发动机泡了水,轴承锈死,叶片卡住,拆开后散了一地零件。她一块一块清洗、检查、上油,装了拆、拆了装,三天过去了,进度条纹丝不动。
“轴承。“她终于认了,“主轴轴承的滚珠磨掉了两粒,剩下的也有点瓢。这种规格,旧世是标准件,末世……这型号的轴承,整个东海郡我翻了两年都没见到过。“
“粒数,尺寸。“陆铸走过来,伸手。
水镜把坏轴承递给他。陆铸捏着轴承看了两秒,金之力透进钢珠,扫过磨痕,心里已经有了数:“六号轴承,外圈直径十九毫米,内孔六毫米,滚珠两毫米五。说你缺什么——缺的就是这圈滚珠。“
“滚珠……“水镜苦笑着摇头,“一把珠子,我拿镊子都夹不稳,你上哪儿找现成的?“
“不打滚珠。“陆铸从工具堆里抽出一根报废的旧世轴承钢棒,“这种钢棒以前是车床上用的,含铬、含锰,硬度和耐磨都够。熔了,拉丝,切成段,磨成球——车床没有,就用我的钳工台:先淬火,再回火,最后夹在自制的磨具里,金之力盯着尺寸磨。两毫米五的公差,我能给你磨到正负一丝。“
“一丝?“水镜瞪圆了眼,“你徒手磨一丝?“
“火候到了,手就是机器。“陆铸说,“凑合用,先用着,回头要是有车床,再给你机加工一打。“
这天下午,陆铸在车间角落里搭了个土法拉丝机:一个手摇绞盘,一副自制的模具,炉火烧红钢棒,绞盘慢转,钢棒被一点点拉成细丝。火之力控温,金之力盯尺寸,拉到两毫米五的直径停下,剪成段,再一颗一颗夹进磨具里转。转一颗,他拿卡尺量一颗,转废了三颗,剩下三十七颗滚珠颗颗达标。
水镜接过去,把滚珠装进保持架,转了一下主轴——嗡的一声,轴承转得轻快无声,比原厂还顺。她把轴装回发动机,试探着拧动燃烧室,干涩的阻力消失了,涡轴转动流畅,叶片划出的风声均匀悦耳。
“活了。“她直起腰,声音有点抖,“它活了。“
“那就准备上天。“陆铸说。
飞控系统的机械化改装,比发动机更费心思。陆铸把驾驶舱里能拆的电子设备全拆了,用钢索、滑轮、重力摆、弹簧配重搭起一套原始但可靠的机械飞控。方向舵接脚蹬,升降舵接中央拉杆,副翼接侧杆,每一条钢索都穿过滑轮组,转角处装上他手磨的陶瓷滑轮衬套——摩擦力小,耐得住高低温。最后装上那个双摆陀螺仪:一根横杆吊着一个重锤,飞机俯仰时重锤不动,拉杆相对滑动,带动舵面修正。没有电子陀螺的精度,但胜在实在,不怕泡水,不怕断电。
“你这玩意儿,“水镜看着那个重锤一摇一晃,“比我见过的陀螺仪丑多了。“
“丑归丑,它能用。“陆铸把最后一颗螺栓拧紧,“而且不用充电。你说它丑,你倒是给它充个电试试?“
水镜噎住了,半晌才说:“……你赢了。“
“先别急着上天。“水镜拦他,“听风号是滑翔为主、动力为辅的改装机,跟拖拉机不是一个开法。你负责结构,我负责系统,飞行要领得先过一遍——这年头没有教官,但起降规矩,我爹教过我,我转教给你。“
她从操作台底下拖出一块旧世的应急白板,板面用油笔写满了笔记。她拿一截废电极当粉笔,在板上画了一架侧视的飞机,画了三条线:“起飞三阶段:滑跑、抬前轮、爬升。离地速度一百一十公里上下——油门推到底之前,先看风标:顺风起飞,等着撞树;逆风起飞,翅膀才有劲。“又画了个俯视图,“降落更讲究:对正跑道、收油门、放襟翼、拉飘、接地。听风号的襟翼是手摇的,拉杆的同时得摇那把手——摇早了,机头往下栽;摇晚了,飘过头,冲出跑道。“
陆铸挨个记下,又问了一句:“发动机半路停了呢?“
“滑翔。“水镜回答得干脆,“听风号就是为滑翔改的——发动机停了,它就是架大滑翔机,靠砍下的高度照样能落回跑道。这是改装最大的好处:飞机最怕的那件事,咱们不怕。“
“这倒是。“陆铸点头,“电子飞控泡水就废,机械飞控没电照飞。划算。“
第64天清晨,两人把“海燕“二号拖出车间,沿着部队旧跑道推到东海郡东边一处断崖。崖下是海,崖顶是三十里长的旧军
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