第七十七章 铁坯铸炮技术
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李植升为防守官后，范家庄的兵额也提高了。龙腾小说ltxsba.com原先范家庄庄兵兵额只有五十七人，现在有一百二十人了。
按道理来说，有这种么多的兵额，每个月就能领到相应的月饷。不过明末财政紧张，朝廷经常不出兵饷。再加上明末官场，军饷下来雁过拔毛层层克扣，到手就极少了。范家庄一百二十人按天津镇的标准本该每月有二百四十两军饷，但到了二月中旬第一次军饷时候，李植从卫指挥使司拿到手的军饷只有七十二两，平均一个兵七钱银子都不到。
看到这样惨淡的军饷，李植暗道大明的基层武官也贪不了多少钱。即便是吃空饷，也吃不了多少。
拿不足月饷的士兵是没有士气进行高强度的军事训练的，最终养出来的军队只能是弱兵。范家庄本来有二十七个老弱庄兵，其中四人应募转入了李植的选锋团，还余二十三人。下来的军饷这么少，李植不可能募满一百二十人，只能再募集十三人。
这三十一个庄兵李植每个月给二两月饷，刚好把上面下来的月饷全部用光。平时李植让他们每日训练城墙防守，到时候可以稍微协助选锋团守城。其他时候这支部队就在城内巡逻，充任类似武警的角色。
下来军饷这么少，兵额不足的问题李植也没有办法。如果上官来检查时候，李植找一百多选锋团士兵来凑数就是了。
忙完了这些事情，李植便去盐山俘虏的五个炮匠那里看了看。
回城一个月了，李植让这五个炮匠在城内建一个火炮作坊，不知道如今建得如何。
等李植走到城东的火炮作坊里，现熔炉已经建好，五个铁匠正忙着制造铸炮泥型。
看到李植过来，五个炮匠赶紧跪下：“见过防守大人！”
李植说道：“免礼！你们的进展怎么样了？”
五个炮匠答道：“工具和熔炉已经打造好，正在制造泥型准备制造第一门铜炮。许久没有造炮了，第一门炮准备铸一门小的。”
李植想了想，问道：“你们用泥型铸炮，那泥土里的水气怎么办？那么高温度的铜水一浇进去，泥型里只要有一丝水分就会立即蒸在铜炮里形成气泡。这气泡可是火炮的大害，很容易导致炮壁脆弱导致炸镗！”
五个炮匠没想到李植还知道这么专业的问题，互相看了一眼，由匠头曹余说道：“大人高明！泥型确实容易藏水，所以我们做好泥型后都要风干一个月才使用。不过即便是这样，还是免不了有些微水气使铜炮形成马蜂窝，平均铸十门炮才有一门炮堪用！”
“十门炮才有一门堪用？那要做多少无用功？李植笑了笑，想起自己在后世了解过的铸炮方法，说道：“如果不用泥型，而是用铸铁做铸模呢！铸铁里面没有水，不会形成气泡，成品率会极大提高！而且铸铁做铸模产出的铜炮内外壁都会比较光滑，可以减少表面清理，镟铣内膛的工作量！”
听到李植的话，五个炮匠都愣住了，他们用泥型做了十年的大炮，却没想过用铸铁来做铁型。
不过他们毕竟是经验丰富的铸造师，李植一点拨他们立即反应过来，都觉得用铸铁来做铸模确实有很大的好处。
没有了气泡，铸造的火炮岂不是每门都能用？再不会有那么多废品！
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