The horse house has not received the urgent order of the court for a long time, and the Yanglin is in a hurry to put on a set of court clothes that do not fit well and go out, I heard that the civil and military forces of the Manchu Dynasty are waiting for him, and the coachman of the horse house directly stepped on the tricycle to the door of the Taiji Hall before calling Yanglin to get off. "Captain Yanglin, meet my emperor."

Since the official face of the king in the Taiji Palace, all the pairs will be written into the history books, and the etiquette is not missing at all, and Yanglin, who has not knelt for a long time, knelt down again solidly. "Commander Yang Lin, you tell the Manchu Dynasty civil and military forces, what are the tricks for the application of firearms, and what you say must be detailed and detailed."

Li Shimin's upright face still had the words 'I'm in a bad mood' written on it, and Yang Lin had to raise the board and reply: "Returning to Your Majesty, the application of firearms, in addition to calculating the ignition point time and the static parabola, actually has no skills, why did Your Majesty suddenly ask this question?" "Please explain in detail what the horse means, the ignition time, and the parabola." Yang Lin only said a few words, but Li Jing heard the main point, and asked rhetorically without waiting for Li Shimin to continue to ask. "The ignition time calculation is actually very simple, the ammunition leads made by the craftsman are all fixed length, and as far as I know, it takes about fifteen seconds to burn. That is to say, the time required for a shotgun to be fired from ignition to cannonball launch is fifteen seconds, that is, the time for a person to count from 1 to 15 with a calm and uniform speed, assuming that our army has a hundred artillery arrays waiting in formation, and the elevation angle is forty-five degrees, then the firing range is about eighty meters, and the enemy army has 3,000 cavalry, which is charging at our army from 300 meters away. “

Yang Lin asked rhetorically, it is easy to run the day, but the court is silent, only the reaction is as fast as Li Jing, who is calculating quickly, but I am afraid it will be difficult to solve the problem for a while. Seeing this, Yang Lin shook his head and said: "It should be fired after five seconds, because when the cavalry charges, a breath is about ten meters, from igniting the lead to the shell landing, it takes about sixteen or seventeen seconds in total, plus five seconds of delay, about twenty-two seconds, the cavalry just ran to the eighty-meter range of the shotgun, at this time, killing the enemy soldier who rushed to the front will slow down the enemy's charge, destroy the enemy's charging formation, and minimize the enemy's lethality." This is the importance of calculating the ignition point of the shell, if you order early, the shell misses, and if you are late, the enemy has already rushed over, and the shell still misses the rear of the enemy, and it will not have any effect on killing and injuring the enemy. ”

In this way, most of the ministers understand what the ignition time means, he is like a bow and arrow that needs to be delayed to be launched, and the projectile distance and ignition time must be calculated in advance, but most of the generals in the military array can't even read words, how can they understand such advanced arithmetic?

"No wonder this is the case, just this ignition time calculation has stumped most of the generals in the army, it seems that the generals of the firearms battalion must be proficient in arithmetic." Li Shimin has naturally seen the use of firearms many times, and the most equipped in Datang now is the shotgun run, followed by the Wan Cavalry Army is also equipped with a revolver, but the sergeants of the Tang Dynasty do not seem to be proficient in this, looking at the ten thousand cavalry led by Xue Rengui all carrying bows and arrows, you can know that the fire gun may be more suitable for infantry to kill at close range.

"Not only that, different battlefield environments, but also to calculate different parabolas, if in the steel armor ship or ship, but also to calculate the active parabola, calculate the landing point of the shell, in order to make it explode at the most needed position, for example, Your Majesty is sailing on the Tianshen, is facing the Taiji Hall to drop an explosive package, the goal of the Taiji Hall is big enough! However, the explosives package may not be able to blow up to the Taiji Temple, because of the principle of inertia, the landing point of the explosives package will be deviated, and the delivery time must be calculated according to the height, and the parabola of the explosive package must be calculated according to the driving speed, so that the explosives package can accurately hit the target. If you don't believe me, you can do an experiment. ”

Okay, after Yang Lin finished speaking, the Luo circle pattern in the eyes of the ministers came out again, Li Er touched his beard as if he didn't understand, he didn't dare to really use the Taiji Hall as a test, and continued: "Believe, believe, such a complex arithmetic skill, how many people in my Datang can calculate?" "Well, at the moment, not much! There are formulas for calculating parabolas in the junior high school textbooks of Chang'an Academy, but at least the level of junior high school graduates can barely calculate these arithmetic problems. "I'll go, it's a junior high school student again······" Li Shimin almost squirted a mouthful of old blood, recently he has heard the most about junior high school graduates, the spaceship can't fly without junior high school graduates, and the cannonballs can't be hit without junior high school graduates, but where are the junior high school graduates of Datang? "Your Majesty, you urgently summoned your ministers to the court to play a duet, in order not only to discuss the use of firearms!" Yang Lin looked at the strange expressions of the ministers, especially the eyes of the generals who scratched their ears and cheeks and looked at them like treasures, this seemed to be a little wrong!

As soon as Li Shimin waved his hand, the eunuch sent a military report from Hebei Province to Yanglin.

"Na Na Na, it can be seen from this battle report that firearms did not play their due role in the Zhenbei Army at all, and when they were attacked, they did not use the explosive power of firearms to disperse the enemy's war horses, not to mention that they did not detonate the explosive bag when they evacuated, but let the enemy grab our army's ammunition and use it against our army, as long as they did either of these two points, the losses of the Northern Army could not be so great.

Looking at the 10,000 cavalry army, they have been initially introduced in terms of gunpowder, after finding that the Murwei and the cavalry are invincible, they decisively chose to ignite all their ammunition, put it in place, and then evacuated, when the enemy chased them to their original position, the ammunition exploded, not only killed and injured a large number of enemy troops, but also found a chance to get out of the battlefield, if they were not surrounded and intercepted by more than ten times their own cavalry, and ran out of ammunition and food, only with this 10,000 horses, they could level the results of the enemy and us. ”

The numbers on the battle report are very scary, anyway, Yanglin is scared, tens of thousands of Tang Dynasty young people died in this battle, which means that tens of thousands of Tang families will lose their pillars, and the 10,000 cavalry troops in Hebei Province are all veterans, and they are the knights with the most experience in Datang combat, in the case of losing more than fifty percent of the soldiers, they actually did not disperse, relying on only 10,000 cavalry, not only undertook the work of breaking off the defeated Zhenbei Army, but also left more than 30,000 corpses of the Goryeo coalition army, and only about one percent of the soldiers survived on their side. still insisted on fighting, it can be seen that the battle situation was so fierce, if it were not for them, the 150,000 Zhenbei army would have been completely annihilated by nearly 300,000 Goryeo coalition troops.

"I swear to this hatred."

Li Shimin slapped the dragon chair violently, and stood up from the chair angrily, even Yang Lin, who had not been in the court for a long time, knew that he should kneel down to cheer him up at this moment, so in the midst of a wave of revenge and hatred, Li Shimin calmly sat back on his dragon chair.

The Zhenbei Army has built a defense line on the Yanshan section of the Great Wall, and with the support of the Zhendong Army, there will be no problems in a short time, and Li Shimin has fallen into the consideration of the imperial expedition, he wants to go very much, but he is suffering from no one to supervise the country, and the crown prince Li Chengqian does not dare to use it again.

"God, when will Chang'an Academy be able to cultivate a group of junior high school graduates for me?" After struggling for a moment, Li Shimin asked. With the rapid development of the Tang Dynasty, there are too many places that need talents who know mathematics, physics and chemistry, take the simplest one, the accounts of the imperial court are now no longer clear, of course, this is to say that the existing ministers of the imperial court, excluding the scientific research talents of the Yanglin team, this alone is worried about the emperor of the ages.

"Well, according to the results of the first three monthly exams of Chang'an Academy this semester, in the first half of this year, maybe one person will be able to complete the junior high school coursework, and the rest will be at the end of the year at the earliest." Yang Lin replied truthfully.

"Who is so intelligent?" Li Shimin knows how difficult it is to understand the knowledge in the junior high school classroom that makes him full of circles as soon as he listens to it, and someone can master the knowledge of the junior high school grade in a year, and he is really a genius.

"It's none other than Li Zhi, the king of Jin." As soon as he heard the answer, Li Shimin regretted asking Yanglin this question, he originally intended to hide Li Zhi for a few more years, but now that it has been exposed, I don't know whether to be happy or worried. (To be continued.) )