Three Kingdoms

  Chapter 697 The Birth of the Iron Crossbow

  Pingyang Today, the high-speed operation workshop is like a large factory, which has become an important support for Feiqian. It not only provides a large number of ordinary equipment, but also provides special products that Feiqian needs.

  With iron ore, the raw materials are not a problem, and with Huang's craftsmen, after many experiments and adjustments, the improvement based on the bronze crossbow is finally completed.

   What Feiqian is holding now is basically a finalized sample.

Huang Dou, who sent the crossbow, has lost a lot of weight, and his body like a ball has gradually changed into a muscular appearance, just like Russian women in later generations. Before and after marriage, they are like two people, except that Huang Dou It just developed backwards.

Because the crossbow machine is a military system and is ready for mass production, so it is not very particular about some details, there are no patterns, and there are no extra decorations. The pure and simple structure is for better Easier to kill.

   It is said to be an iron crossbow, but it is not actually made of iron.

  The crossbow box is changed to iron, and the missing part of the crossbow machine Wangshan hanging knife is still bronze. No way, at this stage of the Han Dynasty, the advantages of bronze in terms of infusion are still much stronger than black iron. The infused bronze can directly have sufficient strength and toughness, but black iron must be re-fried with steel to be strong. However, it still consumes too much manpower to beat 30-refined or 50-refined steel into parts like hanging knives.

  The wooden support is still there, and the surrounding things are basically unchanged, but they are reinforced with iron hoops, making it less likely to be damaged during actual operation.

  The biggest change is the crossbow arm, which has been replaced by a steel structure from bakelite.

   But for the wire string, although Fei Qian had a good idea, it still failed in the end.

  This crossbow machine is hung on the crossbow arm, which is a bowstring made of a mixture of hair, hemp, and silk.

Huang Dou said from the side: "Although the iron wire is good, it will be stretched after about twenty times of bowing and must be readjusted, and so on. After three adjustments, it must be replaced, otherwise it will be very easy to break. ..." That is to say, according to the current technology of the Han Dynasty, the iron wire produced will have the risk of breaking and being damaged after 60 shots.

   Regarding this point, Fei Qian is also helpless.

Originally, in Fei Qian's idea, the bowstring should be twisted together by multiple strands of ultra-thin steel wires similar to the appearance of bicycle brake wires in later generations, but now the craftsmanship of the Han Dynasty cannot meet such requirements. It came out, but it's still thick...

  Even if Fei Qian borrowed the skills of water power and leverage to pull the wire, but the limitations of materials still make Fei Qian helpless. If you want to pull out a thinner iron wire that is not easy to break, you must require the steel to have stronger toughness, which in turn requires that the steel must be forged again, and the steel that has been forged many times will in turn It increases the difficulty of wire drawing, so it falls into an endless loop.

   Coupled with the high labor and high cost required in this way, there is a fundamental conflict with Fiqian's original idea of ​​simplicity and easy replacement.

  However, the iron wire pulled out of ordinary car materials is not without other uses...

  The cost of making steel crossbow arms is relatively lower than before. After all, there is still a huge gap in the difficulty of making iron sheets and iron wires. Because of the realization of the variable speed gear hydraulic forging equipment, it is easier and simpler for Feiqian to obtain steel with 30 or even 50 refinements than before.

Driven by the constant flow of water, the beating machine that operates back and forth, as long as the hammer arm is not damaged, can even be struck with the same strength for 24 hours a day, which makes it easier for Feiqian to obtain more High quality steel, resulting in the double steel crossbow arms that appear on the crossbow.

Huang Dou said: "The outer layer of the crossbow arm is 30-reinforced, which is harder, and the inner layer is 50-reinforced, which is tougher. This is better than using only 30 or 50. One hundred and fifty steps away can penetrate armor, and three hundred and fifty steps away can penetrate an inch into wood..."

  In this way, it can still be lethal to unarmored targets at a distance of 350 steps. This is more than double the range of the bow...

  Effective range and maximum range are completely two concepts. The so-called can't penetrate Lu Jin at the end of the crossbow, that's what it means. Because of air resistance, the strength of the arrow and the crossbow dropped very quickly during the final flight. Even if it was projected, it was only the damage caused by the gravity of the arrow itself, and it was absolutely equal to the strength of the arrow when it left the string. Can't compare.

Fei Qian looked at the crossbow arm, and the ductility and toughness of steel were perfectly displayed at this moment. The slightly curved crossbow arm was like a crescent moon, and the dark surface seemed to have been burned to prevent rust. This is The most valuable part of the entire new crossbow.

Because of the crossbow arm, it is impossible to make it as long as the bow. The traditional Bakelite structure crossbow arm is short, so naturally it is necessary to choose a bow string with better elasticity and require a higher bow string to increase power. .

   Just like the rhubarb crossbow in the early Han Dynasty, not only the arm of the crossbow is longer than that of ordinary crossbows, but there are also special requirements for the strings of the crossbow.

  Now, the toughness of steel is enough to make up for the short range of the crossbow arm. It is only two-thirds of the weight of the rhubarb crossbow, but it can provide power comparable to the rhubarb crossbow.

   It's just that the winding still needs to be stretched. Alas, Fei Qian sighed slightly.

Composite pulley bowstrings probably couldn’t be made in the Han Dynasty. In this way, the crossbow can only be used for infantry. As for the cavalry, the hand crossbow is still too complicated, and there are a lot of things involved. bright...

But this is enough. The bows of the cavalry and the crossbows of the infantry can form an effective attack surface on the battlefield, especially the crossbow, which is not huge in the ultra-long-range and charging standby. The advantage, and more importantly, as long as there are enough crossbows, Fei Qian can change all the pawns into ordinary part-time crossbowmen.

   But it is impossible to produce an archer without long-term training.

   So now the question is output and cost.

   "There are 300 of them now, and it is expected to reach 800 by the beginning of next spring..." Huang Dou said, "The main reason is that the weather has been cold recently, and the wood used for the crossbow wooden supports is not easy to dry out..."

   Feiqian nodded, adding the 800 crossbows to the original 100 crossbows, basically you can have a thousand strong crossbows, so it is more or less enough...

   There are probably a few more chapters about farming, and we are about to enter the next link...

   It’s been almost a year since the author Jun wrote it…

   150W words, oh oh oh, let the author be proud for a while first...

  (end of this chapter)