When Xu Ping and Guo Zheng were talking around the car, Wang Kai, Han Qi and others couldn't wait for Xu Ping, so they also found it together. When they saw these two new things, they gathered around to watch them together.

Turning around and seeing Tan Hu, Xu Ping said: "Tan Hu, you take three guards, sit in the car together, and find a horse to pull it to the open space outside to try it." Remember a man lying in the car, pretending to be a sick person, and seeing how he runs. ”

Tan Hu responded to the promise, ordered three guards casually, and happily gathered around the car.

Guo Jian hurriedly stopped and said, "Wait, I haven't finished talking about the benefits of this car, so wait a minute." ——After a cursory, although the current car looks similar to the past, in fact, there are many fewer small pieces of bits and pieces, and the number of small pieces is only more than 60% of what it used to be. In this way, it will not be as easy to break as before, and it will be easy to repair if it is broken. ”

Reducing the number of parts and strengthening the strength of key components can improve the reliability of the car, Xu Ping nodded again and again.

Guo Qian said: "Not only that, after this car was made, I tried it countless times in Fengxiang Mansion, where it is easy to break, where it is not easy to break, where it has never been broken, I have written it down one by one." Each of these small pieces has a size and mold, so as to ensure that each car is consistent, and all cars with small pieces can be repaired. Even as a last resort, it is okay to combine two or even several cars into one. The key is that it is easy to repair, and the car cannot be broken, so it can only be thrown there and wasted in vain. ”

Xu Ping nodded again and again after hearing this: "Zhongmou, what you said is the key to being right." Where can the things that are used every day never go bad? Sturdy and durable, as long as you do your best, you can't force it, the key is that it is easy to repair after it is broken. It's important that small pieces are common to every car, and you've done a great job, great! ”

Mass-produced products, modularization and generalization are the right way, and things like cars may not be broken, especially when used in grassland deserts without roads. Bad is not terrible, the key is to be easy to repair, it is best to be able to predict where the good and bad are in advance, bring sufficient spare parts in advance, and repair at any time. If this is the case, it is not possible to force every small piece to be strong, but to deliberately make the small pieces that are easy to change, repair, and carry into weak links. The bad is bad in the place where the design is good, just like the fuse pin in the machine in Xu Ping's previous life, the fuse in the electrical appliance, the bad is bad here, and it can be replaced in time. Versatility is also important, and the common parts of each car not only reduce the burden of carrying spare parts, but also make up several broken cars into one. The problem with the vehicle only reduces the power capacity, not the paralysis of the transportation capacity.

Guo Jian is indeed talented in these things, and in later generations, he must be a great scientist and an excellent engineer.

Obviously, Guo Jian was also very proud of this car, and said to Tan Hu: "Tishi, come, you sit up, sit here!" ”

Tan Hu smiled, walked to the front of the car, and jumped to the top of the wheel according to what Guo said. Now the wheels have become bigger, the frame has become arched, and the ends have hung down, and the wheels have become the highest place in the car, if it weren't for Tan Hu's agility, he really couldn't sit on it. As Tan Hu's body sat in the car, it was obvious that the entire frame had sunk.

Guo Qian bent down, pointed to a stack of bamboo slices above the wheel, and said: "Jinglu, look, I have added bamboo slices here, which are thick in the middle and thin on both sides, and they have been roasted with fire, and they will never rot." This way, the driving process is less bumpy! ”

"Very good! Very good! "This is the leaf spring, which was common in Xu Ping's previous life in low-end vehicles, especially trucks and tractors. Of course, the truck weighs dozens of tons, and the leaf spring is made of highly elastic steel, which weighs no more than one ton, and it is enough to replace the steel with refined bamboo sheets. Although not as durable as steel, it can be replaced frequently.

Using leaf springs to absorb shocks Xu Ping had mentioned it to Guo Zheng before, but it took a lot of effort for Guo Zheng to find the right material, make the required shape, and carry out the necessary treatment. There are many large bamboos in the Qinlong area, and the use of bamboo as a material has a wide range of sources, strong toughness, easy preparation and easy replacement, which is indeed very suitable. Forcing the use of steel is not right.

There are many forms of shock absorption in vehicles, but in fact, there are very few compression springs, and other forms are mostly used. Of course, in this era, you can't use compressed air as high-end and high-grade, but leaf springs, connecting rod torsion frames and the like can be borrowed. However, the material is not as good as special steel, and the performance is of course not comparable, but the requirements for use are also much lower, and it is enough to use.

The bamboo leaf spring used by Guo Zheng is the best part of the toughness of the bamboo piece, cut into a shape that is thin on both sides and thick in the middle, and then the multiple pieces are tightly pressed together and combined to be installed at the place where the wheel axle and the frame are connected. This kind of bamboo leaf spring, in fact, was still useful in Xu Ping's previous life, and was used on low-end freight trucks such as animal powered vehicles or simple tricycles and tractor bodies. Although it is far less durable than steel, it is much cheaper and cheaper than the cost of replacement.

In addition to bamboo leaf springs, in fact, bamboo torsion springs can also be used, but Xu Ping did not have the energy to test them one by one, and he did not know what advantages and disadvantages they had. Bamboo leaf springs and bamboo torsion springs are deformed greatly when stressed, and the speed of restoring their shape after force removal is slow, which is not suitable for bows, crossbows and other weapons, but it is still very useful for some shock-absorbing occasions.

Sitting in the car, Tan Hu was on a whim, up and down, the frame followed him up and down, and the people around him looked at him and laughed. Perhaps in the eyes of Han Qi and other people who have no personal experience of war, this is a very interesting novelty, quite interesting, but in Wang Kai and other people who have experienced several wars, this car is of great significance.

Of course, grasslands and deserts also include vast plains, and the ability to maneuver is a matter of life and death for an army. In this regard, the Han people are indeed inferior to the nomadic people, in the grassy desert, the Han people need the same drinking water and accustomed food, and cannot maintain their lives in the same harsh environment as the herdsmen. There is no way to do this, and the differences brought about by daily habits cannot be changed in the short term. You can't ask the Han army to become like herdsmen, it's unrealistic, it's like you're a hunter who goes out hunting, and you don't have to live like your prey. What can be done is to make the army more mobile than the nomadic army, and to be able to carry as many supplies as possible when moving quickly. At this time, this kind of large car with good off-road performance shows great superiority.

The speed of the cavalry of the party was not very fast, and they mainly relied on camels for the transportation of supplies, and the speed of maneuver depended on the speed of camels. Xu Ping only had to let his cavalry brigade run over the camels, and it would be enough to drag down the party army.

The horse-drawn cart, even if it cooperates with the cavalry to march normally for sixty or seventy miles a day and night, can march continuously for ten days and half a month, which is a terrible ability to maneuver. Xu Ping's five field legions, each of which could control a range of hundreds of miles, would envelop the entire front if they marched together. At that time, Yuan Hao no longer had the opportunity to ambush the Song army with five or six times his strength at every turn. In the head-to-head battle, the party has not yet shown its ability to be stronger than the Song army.

Tan Hu came down, and Xu Ping said: "You take a few soldiers, just go out for a run according to what Guo Cao said." If the car is still fine, dozens of cars will be made, and they will be pulled to Yuzhong in the north, where they will run around the valley for ten days to see! ”

Tan Hu promised, took the three guards who had been ordered, and let one of them lie on it pretending to be a patient, and with a roar, he went to the camp gate.

Xu Ping watched a few people leave, and said to Guo Zheng: "I don't have high requirements, as long as this kind of big car can travel for ten days and ten nights in the grassland desert continuously, run five hundred miles, and there is no major damage, for example, half of the car can be scraped together in the end, it will be enough!" Of course, it's good to be more useful, but for now, if you do this, you won't delay the war against the thieves, and it's good to have enough. ”