Yan Bing took out the disassembly diagram he drew last night from his pocket and looked at it carefully.
The reason why she deliberately drew with a pen and phone was mainly because of two reasons.
First, after drawing it, you can give it to other craftsmen and let them copy it on their own, and they won't have too many doubts. But if you give them the phone directly, they will either be scared to death, or they may hold it with hesitation.
Use your mobile phone to smash walnuts, and you will find that this thing is easier to use than a hammer.
Secondly, while drawing, you can also have a deeper impression of each component and assembly step, which will facilitate your own production.
After proper preparation, Yan Bing first used yellow mud to make a embryo. The first step was to make a steel plate for drawing. In order to increase the hardness of the drawing steel plate, she proudly increased the content of iron ore powder. In other words, the steel plate was increased.
The carbon content makes it harder.
After the drawing steel plate is finished, yellow clay is used to make embryos including the crossbow, bow blades, runner, rear sight, pedals and other components, which are fired in sequence.
Then the bow limbs are subjected to sub-temperature quenching and low-temperature tempering to increase the elasticity of the bow limbs.
After dozens of failures, I finally made an elastic bow piece that I couldn't bend even with 50% of my strength. Then I wiped my sweat, blew a breath, smiled silly, and then wrote this down with a pen.
The ratio of steel to carbon, and the approximate time for tempering and cold brewing.
Next, is the most difficult step, the crossbow string.
First use yellow clay to make the embryo as thin as possible, and then use a ruler to measure the dimensions. They are the same as the dimensions of the rear sight, crossbow and pedals, and record them all.
The reason why she did this was to make craftsmen of this era aware of the benefits of standardization and modularization in advance.
On the battlefield, even weapons made of steel will wear out and be damaged one day, and the parts removed from each crossbow can be easily installed on another crossbow. On a battlefield that lacks logistical support,
Particularly important.
She had already thought of this when she was casting the first batch of hundred-forged steel swords in the secret room, and made a "treasure" in advance.
Caliper.
This thing is extremely important in this era of lack of modern equipment. It is the cornerstone of standardization and modularization.
After the steel wire was melted and cast, she used one of the two iron pliers to clamp the brushed steel plate, used the other to grab the tip of the steel wire, passed it through the wire drawing hole, and pulled hard!
The steel wire broke immediately….
Sure enough, the crossbow string is the most difficult step...
Yan Bing shook his head, took a sip of water, and started the second attempt at the steel wire charcoal comparison, then the third attempt, the fourth attempt...
By the time Lu Liang came down and called her to eat, she had already broken all the crossbow strings...
But she was not discouraged. On the contrary, while eating, she was still thinking about the feasibility of various formulas and proportions in her mind. She just took a few hurried bites, threw down the bowl and chopsticks, and went back to the secret room to try again.
Seeing her fussy look, the old man chuckled, pointed at Feng Chen and Lu Liang with his chopsticks, and said, "After clearing the table in a while, you go and help her."
The two nodded and speeded up their eating pace.
When the senior brother and the fifteenth senior brother entered the secret room, they were shocked.
At a glance, he saw the steel wires all over the ground, and the little junior sister who was sitting on the ground and beating the ground hard...
The senior brother laughed at her, and Lu Liang turned back to boil a pot of hot water and came back to refill the empty teapot.
The three people divided the work and devoted themselves to the practice process again.
Senior Brother is responsible for smelting steel ingots, Xiao Shiwu is responsible for using a small scale to select the appropriate amount of iron ore powder, and Li Bing is responsible for recording the entire process.
Finally, after countless repeated trials, the first piece of steel wire in the history of Liang was successfully manufactured.
After Yan Bing happily recorded all the proportions, he tempered and cold extracted the steel wire to increase its toughness and elasticity.
The next step is to assemble it.
The best choice for the material of the crossbow bed is iron wood.
But unfortunately it was too rare, which would force the cost of the entire crossbow to skyrocket, so we had to choose cedar wood as the crossbow bed, which is more cost-effective.
This wood has a hard texture, high toughness, is insect-proof and mildew-proof, does not blister or warp, and is cheap, making it the best choice.
The wood can be selected, but the craftsmanship to turn the wood into a crossbow bed still depends on Feng Chen and Lu Liang. Yan Bing can only watch from the side with wide eyes.
After a while, the two of them handed over the work according to the dimensions designed by Yan Bing. Yan Bing looked at their familiar carpentry work and sighed. Then, he patted the two of them on the shoulders and said, "Look at you guys."
With this craft, junior sister knows how difficult it has been for you in the past eleven years..."
Isn’t it true? Eleven years of frugal life turned two “swordsmen” into “bricklayers”... How can this not be embarrassing...
The senior brother smiled and said, "With you, our hard days are over!"
Lu Liang nodded and said hesitantly: "Sister, Junior Sister, I didn't mean it... I originally thought it was a good thing that you got promoted... I just..."
"Okay!" Yan Bing waved his hand directly and interrupted: "We are all from the same family. If we don't talk about the two families, we will talk about it. Junior sister is not a small-minded person."
Lu Liang: "………………."
"Really not!!" Yan Bing jumped up angrily.
…………………………………………………….
After some drilling and assembly, the first epoch-making cold weapon, the wheel-set composite crossbow, was born.
Yan Bing held up the crossbow, eager to try it. She had prepared four types of crossbow arrows in advance, namely ordinary tapered arrows, armor-piercing pointed arrows, heavy arrows with blood grooves and barbs but relatively weak armor-piercing arrows, and
There is no arrow attached, just a pure wooden arrow with one end sharpened.
Armor-piercing arrows and heavy arrows are specially prepared for surrounding enemy countries that are also wearing heavy armor.
Ordinary cone-shaped arrows and pure wooden arrows are gifts specially prepared for those musketeers who have lost their armor and go into battle lightly.
She had to know the range, power, and reloading time parameters of the compound crossbow she designed, so she gave this glorious and special task to Lu Liang, the weakest of the three.
After all, if she were to try it on her own, she would be able to achieve it effortlessly with just one finger hook, then the whole experiment would be meaningless...
The senior brother also learned the lesson from last time this time. Before going out, he specifically told Lu Liang and Yan Bing to bring their own swords. Then he said hello to his master and walked out of the courtyard.
In order to find a wide and uninhabited place, the three of them went directly out of the city and came to an open space outside the city. The senior brother used a qi machine to search the surrounding area for a hundred feet to ensure that no passers-by would be accidentally injured. He nodded and signaled to Lu
Good to start test firing.
Lu Liang raised the crossbow nervously and gently pulled the trigger... The conical arrow was immediately fired. Then he bent down, stepped on the pedal of the crossbow with his left foot, pulled hard with both hands, cocked it again, and loaded the armor-piercing arrow.
, shoot, wind up again, load heavy arrows..., and finally wooden arrows...
Yan Bing stood by and silently calculated the reloading speed in his mind.
The average reloading speed, four to five seconds... Yan Bing took a pen and wrote it down on paper.
As for the flintlock muskets of the 17th century, even in the hands of a skilled musketeer, the loading time was generally between 20 and 30 seconds. At least in terms of loading time, the compound crossbow has far exceeded that of the contemporaries.
Flintlock gun, then the next step is the range and killing distance...
After shooting the four types of arrows, Lu Liang remained where he was while his senior brother measured the distance.
It is known that the opening and closing distance of each step of an adult male who is 1.7 meters tall is about 60-70 centimeters, while the senior brother is about 1.85 meters tall, and the opening and closing distance of each step should be between 75-85 centimeters.
Therefore, Yan Bing specifically asked his senior brother to walk half the distance between the soles of his feet as much as possible when taking measurements, so that he could get an average opening and closing distance of close to one meter.
After giving these instructions, Yan Bing stared at Feng Chen's footsteps and began to calculate silently. From one hundred steps to two hundred steps, he still didn't see his senior brother waving, which meant he didn't see the crossbow arrows yet.
Two hundred and twenty steps..., two hundred and thirty steps..., as the number stacked up, Yan Bing's breathing became rapid..., two hundred and sixty steps..., two hundred and seventy steps...
…, two hundred and eighty steps….
Suddenly, at the 287th step, the senior brother bent down, picked up a stone and drew a horizontal line in front of his toes. Then, he turned to the right and walked a few steps, pulling out a crossbow arrow from the ground.
Wave at Yan Bing and the others...
This should be the heavy arrow... Although Yan Bing couldn't see clearly what he was holding, he could guess pretty well.
Afterwards, Feng Chen returned to the marked position and continued to walk forward, two hundred and ninety steps..., three hundred steps..., three hundred and ten steps...
When he reached the three hundred and forty-fourth step, Senior Brother made a mark again, walked a few steps to the left, and pulled out another arrow. This should be the second heaviest armor-piercing arrow...
Yan Bing nodded and took notes.
Finally, Feng Chen continued to return to the previous mark and measured the distance, but at this time, Yan Bing no longer felt nervous because the data so far were enough to prove that she had succeeded...
Just when she was completely relieved, she was suddenly pushed hard by Lu Liang on the side. She couldn't stand upright and sat directly on the ground.
Yan Bing looked at Lu Liang with wide eyes, and just when she was looking confused, a dart passed by her eyes and struck hard at the spot where she was standing just now.
Immediately, Lu Liang dropped the crossbow, pulled away and drew his sword, gritted his teeth and said, "Junior sister, be careful! There is someone!"
Yan Bing followed Lu Liang's gaze and turned around to look, only to see seven or eight masked men wearing black clothes and hats, flying towards their position at an alarming speed...
assassin!!!
At this moment, these two words only popped into Yan Bing's mind!