Zhuge Liang pointed out that his newly developed repeater still has four unsatisfactory points:

The first is that the mass is too large, and it can only be delivered by vehicle, and if it is carried by manpower, it may be difficult to last, so it is very difficult to transport the narrow and rugged roads in the Lingnan area. He thought that according to Hongsuke's old skills in making the chariot back then, he would try to break down the repeater into multiple parts that would facilitate temporary assembly, so that two or three pawns could carry it and keep up with the speed of the march. And if you use it with one person to operate and one person to change the box, the launch speed will be faster.

The second is the lack of accuracy. First, in order to facilitate continuous launching, the iron arrow has no feathers, and it is difficult to ensure a smooth flight; Second, the commonly used crossbow is equipped with "Wangshan" to facilitate aiming, but the arrow box on the repeater occupies the position of "Wangshan", resulting in inconvenient aiming and greatly reduced accuracy.

The third is that the cost is relatively high, the crossbow uses a whole set of six gears, temporarily cast in copper, this year copper can be minted money, or called "gold", so the cost of these gears alone is very expensive. Even if it is more iron in the future, the gears will be required to be able to bite accurately, which is not something that ordinary craftsmen can do. Basically, the cost of building this repeater can make five strong bows and four strong crossbows.

Fourth, the range is not satisfactory. Zhuge Liang adopted Hongfu's suggestion, using hemp silk and twisted rope as strings, after testing, the adaptability to the humid climate is very good, but its elasticity is not as good as the string of animal tendons. Moreover, the heavy iron arrows also limited the effective range. If it is an ordinary four-stone six-bucket crossbow, with feather arrows, it can shoot one hundred and twenty paces away.

Zhuge Liang said, some of these four questions, I already have ideas. As long as you are given enough time and funds for development. It's not hard to solve. Some of them have not yet been properly improved. That's why I'm going to show you to the teacher first: "Mr. has made a profit or loss of a car, and he has no ingenuity, or he can enlighten the wisdom." ”

It was Hongsuke who frowned, and said in his heart, how can I have so much ingenuity? Besides, leverage is not enough, and there is no research on gears. Turned his head to look at Ma Jun: "What does Deheng think?" ”

Ma Jun was looking at Zhuge Lian's crossbow, and his heart was itching - since he became an official in the capital, his affairs were cumbersome. It's been a long time since I've touched the machine I'm most interested in—I couldn't help but be stunned when I suddenly asked. Well, why is there still a part of me interjecting here? Aren't you going to wait until you're done to talk to me?

Could it be that Taiwei and Zhuge Shilang summoned me here for this new repeater? No way......

For a while, he was speechless. It was Hongfu who teased: "Deheng Zeng Yun is good at bracketing, so he recalculates and learns, is it not a good idea?" Then he was afraid of scaring the child, so he hurriedly comforted him with gentle words: "It's okay to speak out, I don't offend you." ”

Ma Jun hesitantly stood up and ran to the front of the repeater. I circled three times in a row and looked closely. Then he spread his hands: "I, I...... Jun doesn't know the machine and the ...... of it, although he can't finish the words, he is a person who is both exquisite and has seven tricks, how can anyone not understand what he means? Kong Mingdang even took out a roll of paper from his sleeve and handed it to Ma Jun: "This composition is also considerable, but it must not be leaked!" ”

Ma Jun took the paper, unfolded it and took a look, and sure enough, it was the structure diagram of Zhuge Repeater. He flipped it over, stared at the gear transmission part carefully for a long time, and then muttered: "With Jun Yi, Yi, Yi ......" raised his head with a red face, but saw that both Hongfu and Zhuge Kongming looked at themselves with expectant eyes, and there was no contempt or ridicule, so he gritted his teeth and simply said: "Skillful, clever is skillful, but it is not perfect." ”

Heck, that's pretty smooth.

It was Hongfu and Zhuge Kongming who heard this, and their performances were different. Zhuge Liang looked at Ma Jun expectantly at first, holding the idea that "the stones of other mountains can attack jade", hoping that Ma Jun could talk about his own thoughts in some details and give himself enough inspiration. He didn't expect that Ma Deheng would directly say, "It's not perfect"-Of course I know that this thing is not perfect, but what kind of ability do you have to dare to despise me so much and rush to the official?!

Zhuge Liang is very well-cultivated, if he changes someone, he may beat Ma Jun out on the spot. He only smiled slightly, and was silent—I couldn't refute it, my teacher was still around, and I listened to how the teacher reprimanded the madman.

But who thought that Hongfu heard this, but he couldn't help but slap his hands and laugh: "I have it!" ”

Ma Jun said this sentence, Hongfu is actually very familiar. Why did he call Ma Jun to watch the repeater demonstration? And it's not just because Ma Jun is an inventor who has been known for centuries. In the original history, the crossbow made by Zhuge Liang, I don't know what the reason is, and it was soon leaked to Cao Wei, Ma Jun saw it, and it was this sentence on the spot: "Clever is clever, not perfect." "Boasting that after its own improvements, it can be increased by five times more efficient.

Unfortunately, he didn't have enough money to modify the repeater. Not only that, it is said that Ma Jun also tried to improve the car, and made a small model that can be fired continuously, which can throw some bottles and tiles dozens of steps away. Fu Xuan went to Cao Xi because of this matter and said: "If the Ma family wants to write now, the essence of the country and the army will also be used." Fei Shixun's wood, the strength of two people, not timeless, but non-definite...... "The imperial court should give it a try." Cao Xi thought so, and ran to report to his elder brother and ruling minister Cao Shuang. But Cao Shuang knows a fart about this waste firewood, "suddenly, it won't be tried", so improving the Zhuge crossbow and the cart will always be just an idea.

For Zhuge Lian's crossbow, Ma Jun's "words and deeds can be increased by five times", is it bragging? How much moisture is there? No one even knows......

It was Hongfu who read the relevant records in his previous life, and he deeply regretted it, since he had the opportunity this time, how could he not let Ma Deheng get involved in the research and development of the crossbow? The specific time when Ma Jun wanted to improve the repeater is unknown, but it should be after his middle age, before which he had already improved the loom, created a highly efficient overturn, and invented the guide car and the hydraulic "Baixi", which was known all over the world. Now he is still only a weak-crowned young man, as far as Hongsuke knows, he doesn't have any inventions that he can handle, so you can't "make a five-fold increase", even if you can increase the power of the repeater by fifty percent. Zhuge Liang and I have to laugh from ear to ear.

What do you think. Both big words. Why don't you try it?

Ma Jun was really itchy, so he solemnly bowed his hand, took a long breath, tried his best to smooth his tongue, and planned to talk eloquently: "Xun thinks, can, can, can ......" The more he choked, the more anxious he became, and the more anxious he was, the more he couldn't speak. In fact, although he has been silent in front of the officials recently, even if he has something to say, he tries to be frugal as much as possible. So as not to be ashamed of the subordinates, but basically it is okay to say it smoothly, but in the face of his own superiors and the powerful Tai Lieutenant, it is really difficult to maintain a calm state of mind - under the nervousness, the stuttering problem is doubled.

Fortunately, Hongsuke knew his weakness and immediately ordered: "Get a pen and paper." "You either write or draw, and it's not that much of a waste of time.

Ma Jun confessed again, then sat down and spread the paper on the ground. wrote a line of words first and presented it to Zhuge Liang. Zhuge Liang took a look. Its text says: "Or reduce its weight in order to hold it, or strengthen its strength to flourish its might, now it is like a hand crossbow and is inconvenient to use, like a car crossbow and difficult to reach far, so it is said to be not the best." ”

Ma Jun's meaning, Zhuge Kongming, you made this chicken ribs. Either make it a little smaller and make it easier for individual soldiers to use, or simply increase the shape and quality, resulting in a ballista, which is not up or down now, and the value will inevitably be greatly reduced.

Zhuge Liang said: "Today, if you want to use the friendship and wide, from Yuan and Hunan to enter, the road is rugged and narrow, and the car is difficult to travel." If it's smaller, shoot at twenty paces, what? "You are right, let's not consider the issue of the ballista, let's talk about the problem of miniaturization, what is the way to reduce its weight but maintain or even increase its power?

Ma Jun simply drew a sketch on the paper: "Or, or it can be easy." Zhuge Liang took it and took a look, only to see that with very concise but regular brushstrokes, he sketched a ballista cart, with only one wheel under the car and a handle behind the car, just like a wheelbarrow commonly used by folks. It was Hongsuke who said yes, so maybe he could push forward on the rough road.

However, Zhuge Liang shook his head: "With a wheel under it, the foundation will be unstable, and it may be difficult to shoot." "Sir, you compiled the "First Introduction to Physics", and raised the question of action and reaction force, if the projectile wants to go far and be accurate, the foundation must be stable, whether the wheel or the single wheel, how can it be stable?

Ma Jun pointed to the picture and gestured, Zhuge Liang understood his intention - the wheelbarrow often has a round in front and a double frame in the rear, which can be supported in a triangle at any time to stabilize the body, and the design of the ballista can be copied, won't it solve the problem smoothly?

Immediately, Ma Jun drew another picture and marked the words, suggesting that the iron arrow should be abandoned, and bamboo and wood should be used as the rod, and the iron head in the front and back should be used as the arrow, so that the weight of the arrow can be reduced and the range can be increased to a certain extent.

Zhuge Liang frowned and thought for a while: "Maybe it's feasible, but you still have to try it." "I didn't think of using an iron arrow as soon as I patted my head, no matter the thickness, length, and weight of the iron arrow, it was all after repeated calculations and experiments before it was finally finalized.

Then he asked Ma Jun, saying that your two ideas are very good, but they are just picking up the missing points, not to mention how much change has been made to my repeater, even after the trial production, the meter is used, and the range and mobility improved are extremely limited. Do you have any other ideas? Speak it all out and listen to it.

However, Ma Jun began to hesitate, and took up the pen and wrote down a line of words: "The squire even crossbow, in the gear, Jun tries the profit and loss, but this is not something that can be done in a moment." ”

The core technology of your repeater is gear-driven, and if you want to greatly improve its effectiveness, you must also start with the gears - but this is not something that can be developed in a day or two, even if I have some ideas in my heart, I dare not rashly announce them without practice.

It was Hongfu who smiled slightly, so he pointed at Ma Jun and asked Zhuge Liang: "Is this son available?" "Do you think this time, Ma Deheng can be your deputy and help develop the repeater? Zhuge Kongming groaned slightly: "Liang, please try it." ”

At present, the military operation to kill and subdue Wulingman and Shanyue is quite smooth, and when it is pacified, and when it is checked as a soldier, it can cooperate with the naval division and advance in multiple directions to restore diplomatic relations and Guangzhou--It is planned to launch an offensive around the autumn harvest in the second half of this year. It's just that the location is far away, and the deployment of soldiers and the transportation of materials will take several months, and the development and large-scale manufacturing of the repeater must be completed before then, and the time is really running out. Regardless of whether this Ma Jun really has the ability and ideas, or he is boasting and exaggerating, Zhuge Liang is willing to give it a try.

Besides, Ma Jun's ability in counting is affirmed by Zhao Shuang, and in terms of machinery, at least he is not confused when he sees his gear layout, Zhuge Liang is worried that there is no suitable assistant to engage in research and development, no matter what, Ma Deheng's assistant still has the power. He is also his own subordinate, so he doesn't need to be in vain!

It was Hongfu who smiled faintly and patted Ma Jun's shoulder: "Deheng, you have to do it well, but if you succeed, you will be famous in history!" ”

Ma Jun bowed his hand and said, "Shang, there is still a ...... to please" is Hongfu said, if you have any needs, you can put it forward. So Ma Jun picked up the pen and wrote down another line of words - "It is the "First Words of Physics" written by the public, and I want to borrow it. (To be continued......)