The days in the "Secret Development Base of Artillery Technology" were very intense, and Xia Hongsheng taught these soldiers how to estimate distances, how to measure angles, how to adjust altitudes, and so on. Pen, fun, pavilion www. biquge。 infoBecause these soldiers don't have a good foundation, these things are very difficult for them. Xia Hongsheng needs to insert some of the most basic things involved in this place when he talks about a certain place. So the amount of things that need to be taught is also huge.

"We already know that in order to use the eye-skipping method, you must be able to estimate the size of the object to be measured, know the height or width of the object, and thus be able to estimate the lateral distance from the object to the position pointed by the thumb. If the size of the object cannot be judged, then the lateral distance cannot be estimated, and the distance between the object and us cannot be estimated. So let's practice the ability to familiarize ourselves with the size of an object by eye. Xia Hongsheng used the eye-beating method for a few days, and found that the weakness of these soldiers was to get the size of the measured object through visual inspection, so he began to practice this item of theirs: "First of all, you must be able to keep some basic lengths firmly in your heart, how long is a meter, how long is ten meters, how long is a hundred meters, and even how long is a centimeter, a decimeter, and a millimeter, you must have a clear impression in your mind." Secondly, what you see in this eye will not be seen all the time. If you put it far, it will be small, and if you put it close, it will be big. The same length of one meter, when you are ten meters away from your eyes, how long it looks, when you are fifty meters away from your eyes, how long it looks, and how it looks when you are 100 meters away, you have to know how it looks. To remember these, there is no other way but to practice more, read more, and memorize more. ”

There is no way, before the advent of professional ranging instruments and tools, these future artillerymen can only use this simple method to roughly estimate the distance.

Xia Hongsheng seems to vaguely remember that there is a kind of instrument that uses triangular relationships to measure distances, and it does not need anything like a power battery, which is purely passive. It seems that I can use eyepieces and the like, but that's all I can, and I don't know much about it anymore.

Therefore, this can only be used in this way. However, this method is said to be used by artillery in later generations, so I think it should be okay.

Xia Hongsheng looked at the soldiers there, estimating the length, width, and height of a large pile of things in front of them, and then compared them.

There is no good way to remember this kind of thing, it can only be practice makes perfect. It's like the old kiln head of a glass factory, with a pair of hands to the front of the kiln, you can estimate the temperature, and it is very accurate. There is also the master who holds the grain in the grain store, as long as the weight is not too large, he basically does not need to be commensurate, and he can report the weight with a hand. That's what comes from decades of experience in the same business.

This is not actually a skill, but already an instinct.

Xia Hongsheng is to train these soldiers to have an instinct for "length". Let them finally answer that if they know what it is, they can roughly know its size and length, and then look at the size and distance of this thing in their field of vision, and they can estimate the distance between them.

"Hou Ye, Hou Ye!" Xia Hongsheng was watching those soldiers train their eyesight, when he saw a craftsman running up to him.

"Master Xie, what's the matter?" Xia Hongsheng asked.

Master Xie took a breath and said to Xia Hongsheng: "We have tried to practice a few kinds of steel, and I want to ask Master Hou to see which one can be used." ”

Xia Hongsheng nodded, handed over the matter of watching the training of the soldiers to Qi Yong, and went back with Master Xie.

At the end, when I entered the shed, I saw a group of old blacksmiths gathering around a few pieces of steel and discussing.

Xia Hongsheng walked over, the blacksmith saluted, and then pointed to a few pieces of steel on the platform and explained to Xia Hongsheng: "Master Hou, we tried to make four samples. This piece is the hardest and hardest, but if it exceeds the force it can withstand, it will be much more brittle and will crumble. This piece is moderately made, with some hardness, but it is not as hard as the one just now, but it is tougher than it, and it is not so easy to break. This one is the softest and most tough, but it is easy to deform. There is also this, this kind of work is the same as that one, but the one is slightly harder, and the one is slightly tougher. Master Hou, can you see which of these kinds can be used? If it doesn't work, let's try again! ”

Xia Hongsheng thought for a while and said to the blacksmith: "This, the distance of the artillery is to fill the gunpowder projectile into the barrel, and then fill the back of the projectile with gunpowder, after detonating the gunpowder, use the thrust generated by the gunpowder explosion to push the projectile out of the barrel and shoot it into the distance. As a result, the barrel is subjected to extremely high temperatures and pressures during continuous firing operations. This requires that the steel used as the barrel should have high strength, high toughness and burn resistance. This cannon steel, and try the hardest and moderately hard two. The steel of the barrel we make is the outer layer of the barrel, and there is a layer of copper in the steel. The function of this steel pipe is to wrap the copper pipe inside, so that the copper pipe inside will not be deformed by high temperature and impact after the explosion of gunpowder. So try to make a cannon barrel with these two harder ones first, and see the effect. ”

"Okay!" The blacksmith replied and asked, "Master Hou, what about the gun carriage and other parts?" ”

"Use that moderate-to-hard one!" Xia Hongsheng thought for a while, replied, and then asked: "How long does it take to try to make an artillery?" ”

"Back to Master Hou, we people are rotating day and night, estimating...... Half a month! The blacksmith smashed it with a hammer and said, "Don't worry, Master Hou, the first sample will be made in half a month!" Bring the projectile together! ”

"Good!" Xia Hongsheng nodded: "Time is pressing, I'm tired of you working harder!" ”

"It's not hard!" Another blacksmith said: "Master Hou, I look at the drawings, there is a wheel under the gun carriage, and this wheel is made according to the wheel of the carriage, how about it?" ”

Xia Hongsheng shook his head: "No, the structure can be the same, but the material can't." It is estimated that the iron frame must be used, otherwise I am afraid that it will not be able to support the artillery, and the horses will run for a long time, and then the frame will not be able to be crushed. The reels are also wrapped with rattan bundles of cork, and the outside is wrapped with cowhide and cowhide. ”

The crowd nodded.

Xia Hongsheng saw the wooden wheel next to him, and thought to himself that Ryukyu could grow rubber trees, but the origin of rubber trees was also in the New World, and it was estimated that there were no rubber trees on Ryukyu Island at the moment. Pity. (To be continued.) )