第七十章 制作天平（3）
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“横梁的长度影响灵敏度，那是在托盘中的物品质量差较高的时候才会出现。最新地址ltxsba.pw”程晋州在纸面上划着道：“我的设计，可以通过提高重心位置和刀口的选择，避开此种情况。”
在21世纪，他说的都是很普通的物理学常识，偶尔伪装助教替导师上课的时候，这些都是要念一念的，从现代物理的角度来看，仅仅算是老掉牙的货色。不过，刘斌和乌纵都很认真的听着，前者还在心里默默演算着程晋州的公式。
“先换上金属横梁吧。”程晋州从桌面上选出一支铁条，交给乌纵道：“能钻出眼吗？”
乌纵摸着胡子，有些发愁的看着拇指长的铁条，他没有相适应的星阵来完成工作。
“让吕续来。”刘匡一把将之揪了过来，道：“这比你上次提交给协会的成果，似乎更进一步了。”
吕续不满的哼哼了两声，但还是伸出一根指头，找准位置在铁条上钻了起来，就见他手指接触之处微微发红，铁条就如同橡皮泥一般，被手指深深的插了进去。
“热能星阵。”吕续鼓起自己的肱二头肌。
“那就把这十几根都弄出来吧。”有好劳力的时候，程晋州一点都不想放过。
刘匡摸着胡须看着程晋州列出的公式。主导者停止了工作，王龄鹤与项欣也围了过来，乌纵和他的两个徒弟激动的好像嗑了药的猴子，想跳又不跳不起来，眯着眼睛想要睡觉，又朦朦胧胧满是幻想。对他们而言，在四级星术士面前演示工作，不啻于小连长面见军长，很有些授勋的感觉。
“以后有时间的话，还是改成空心的比较好。”程晋州评价着。作为实验材料的铁条做工精细，表面连根毛刺都没有，更别说锈点等等，以目前的生产效率，可以想见其价格也一定很结实。
“空心的质量很难控制吧。”放下研究工作，项欣再次变身好奇宝宝。
程晋州一笑道：“也没有那么难，比较好的天平，应该都是空心的吧。”
从大夏朝目前的天平设计来看，其天平的灵敏度与横梁的长度、重量都有关系。手艺好的先生们，肯定会想到制作空心金属横梁的。
程晋州嘴上说着，手上开始整理零件，每要修改一样，都能随便说出几句话来，而吕续也成了人工机床，实时帮他修改。控制砝码大小，确定游码精度，都是分分钟的事情，其方便程度令人羡慕。
乌纵纯粹变成了打下手，当然，他是几个人中工作最快乐的，此刻让他走人，他非得怒了不可。
有正牌星术士帮忙，程晋州组合天平也是飞快，罢了，他又用标准的砝码计算精度，数据精确到小数点后两位。
就连刘匡看了也点头称是道：“这样用起来，就知道有多少误差了。”
从20世纪开始，人们就都是这样处理误差了。程晋州撇撇嘴，转而拿出其中表现最好的一具天平，道：“王龄鹤星术士，多谢您的材料，这架天平就送给您吧。”
精度0.07的天平（注1），在星术士商店中已经很难买到了，王龄鹤倒不推辞，伸手接了过来笑道：“看你在力矩方面的研究，还是很有启发性的。”
“哪里。”程晋州嘿嘿笑着，要说物理方面的内容，许多具体的地方，他都不能完全记得了，但上次从图书馆搞到的《力学计量》虽然仅有一册，却能在细节上给予很好的补充，照抄其中的内容写一两篇几百年前的论文，自然是小菜一碟。
“剩下的我拿回去做吧。”眼看着天色已晚，人形机床又已将零件大致切好，程晋州笑嘻嘻的起身告辞，至少十五六个天平的材料，做出来还贷是绰绰有余了。
项欣急忙忙的站起身来道：“我为您整理这次的研究成果吧。”
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