When the sky was approaching dawn again, the teenagers who had been training in the queue during the day and standing in a military posture all night seemed to have reached a certain limit, and some people began to fall and their legs and waist were numb, and it was difficult to return to the queue for a while. When the Provisional Officer Non-commissioned Officer Corps was about to dispose of it with a military stick according to Xiao Xuan's request.

Xiao Xuan said unexpectedly: "It should be almost, forget it this time." But I'm afraid that when you return to the military tent, you'll start herding sheep and grumbling again, so because you didn't have to worry about the queue training yesterday, you didn't have to worry about breakfast. Now give you an hour to rest on the spot. After an hour, continue to train in the queue until there is no problem with all kinds of true and false passwords, all kinds of circles and alignment! You have to remember that I didn't let you speak, and you gossiped privately, and that's the result! ”

At this time, although the teenagers felt great pressure again when they heard these bad news, they could no longer hold on to the ground under the fatigue of staying up late for the first time and a day and night, and almost in a moment, most of them fell asleep.

At this moment, a few people around Xiao Xuan, as well as a dozen or so craftsmen invited by the Imperial Horse Supervisor, also set up more than twenty pairs of wooden shelves like parallel bars on one side of the school yard after a lot of busyness since the day before. On these wooden shelves, kite strings are used to hang many wooden blocks, some large and small, that have been weighed. In addition, the first test of the wooden parallel bars also tied a lot of thin lines according to a good scale. Everything seems to be somewhat confusing, and even the craftsmen who do what they are asked to do don't know what they are doing it for.

After everything was ready, Xiao Xuan began to personally take a few temporary officers in the battalion and a few cronies to the place where the Imperial Horse Supervisor temporarily stored the equipment and ammunition to re-select firearms and weapons.

This time, Xiao Xuan also suddenly discovered that compared with yesterday, the specifications of firearms and even equipment were somewhat different. The iron leaf cotton armor was obviously a lot heavier, and it felt a lot harder to the touch. Xiao Xuan didn't look at the gunpowder before, so he couldn't tell how much difference there was, but at least roughly the caliber specifications of the artillery not only increased a lot, but also unified a lot. What's more: when people arrived, the horses that belonged to them seemed to be completely unrecognizable to strangers, and were obviously specially chosen. In addition, there were a lot of things that were obviously heavy arquebuses and the like, at least a hundred of them. It's the ordinary three-eyed gun, and it looks a lot newer.

Wang Chengen rushed over at this time and whispered in Xiao Xuan's ear: "These are all equipment and firearms carefully selected by the entire Imperial Horse Supervisor, even the pro-soldiers in the head of the barracks over there may not have this kind of goods. I'm afraid that the personal soldiers under the chief officer of the border army may only have this kind of equipment, and it must be in recent years. Pang Gonggong's meaning: Since His Majesty intends to take this road of going straight to the beginning of the martial arts, he will help him and completely rely on His Majesty. ”

One of Pang Tianshou's eunuchs personally read: "Two iron cannons of the seven-pound general, ten iron cannons of the second general, ten iron cannons of the third general, 300 pieces of three-eyed iron guns, 300 pieces of single-eye iron guns, 120 pieces of Western 127 coin projectiles, 50 pieces of cannon ammunition, 25 large lead bullets and bulk bullets, and 300 pieces of gunfire ammunition; 500 pieces of iron cotton armor, 50 pieces of general armor, 500 pieces of long soldiers, 300 pieces of waist knives, 500 pieces of 4 bucket strength to 5 bucket war bows, and 250 arrows each... Your Majesty please inspect ... ”

Xiao Xuan took out one of the waist knives and violently knocked the back of the knife on several of the firearms, leaving only shallow traces. It seems to be quite different from the steel in my impression, but at least it is still in the category of iron, and it is not too bad.

"Are all firearms made of iron, and not of brass?" Xiao Xuan, because he had read some historical novels and appeared on some forums, knew that some of the last smoothbore guns in the 19th century were made of bronze. During the Sino-Japanese War, Japan also apparently produced bronze-lined steel artillery. It is said that when the bronze cannon fires, there are some early signs of exploding the chamber.

"Then the Holy One does not know anything. In the early years, some of my Ming firearms, whether artillery or handcuffs, were indeed made of copper, but these copper firearms were either too soft or too hard, and they were easy to explode. Otherwise, it is very weakly powerful, and it is far less safe than an iron cannon. The iron cannon can fire projectiles continuously in a very short period of time, until the barrel is hot enough to dry the paper, there is a danger of large explosions, and in addition, the caliber becomes larger, and the copper cannon is not so reliable. According to Pang Tianshou's request, the eunuch in charge of firearms told some inner doorways without saying anything.

"There are only turtle doves and no birds, also because ordinary birds are unreliable?"

"Exactly, the common bird is extremely difficult to process because the inner diameter is too small and slender, and the iron requirements are strict. . . ."

These words did not dispel Xiao Xuan's idea of trying those legendary inferior weapons, but after thinking about it, he still felt that it was better to think about it in the long run, and first take a look at the performance comparison of these reliable firearms that are said to be selected.

So Xiao Xuan selected a big general cannon, four second general cannons, four three general cannons, more than a dozen three-eyed guns and single-eyed guns, first carefully measured the weight of these firearms themselves with several scales, and then hung firmly on the wooden parallel bars and let the tails of these firearms only hang next to the thick wooden blocks of the same V-shaped string.

How can you use your secondary school level cultural knowledge to get the accurate guns, muzzle kinetic energy and other indicators of these firearms? Since the time of recruitment, Xiao Xuan has actually thought about it. It took a lot of time to think about the problem at the end of a middle school book, and finally came up with this method of calculating momentum first: try a small charge to find out how much pendulum potential energy is generated by the recoil momentum of the shell, so that you can reverse the recoil momentum of the entire gun. The muzzle velocity and momentum of the ammunition are then calculated from the proportion of the recoil momentum of the gun and the ratio of the ammunition to the weight of the barrel. With muzzle velocity, then there is also a spectrum of drop heights at different ranges. Even if there is an error, through field measurement adjustment and free fall formula backwards, a roughly reliable conclusion can be drawn. And according to the principle of air resistance, it is obvious that the lower the muzzle velocity, the less likely the effect of air deceleration? Under Xiao Xuan's personal guidance, the firearms test was soon launched.

The rumbling of cannons hundreds of meters away did not seem so deafening, but it also made all the resting teenagers no longer have much childlike excitement about playing with firearms and weapons. Obviously, compared to the firecrackers and cannonballs during the Chinese New Year, the loud sound brought by the real iron cannon is naturally a great shock to the untrained people and horses.