"Make me a mold according to this diagram, and the caliber of the barrel is fixed at thirteen millimeters, which is the distance between the male and male lines. The caliber of the bullet is one millimeter smaller, and the positive and negative error is half a millimeter, and it is cast with a metal mold, and the material is used first, and then the ratio of lead-zinc alloy is tried. "Unable to improve the production process of guns, Hong Tao turned to the second best thing, starting with bullets. Since there is rifling, spherical bullets are not suitable, and round-headed bullets have a better aerodynamic shape than spherical bullets, which are more suitable for rotating flight, which is of great help in stabilizing the trajectory and increasing range and accuracy.

The mold drawn by Hong Tao is the mold for the production of airsoft bullets in later generations, or Mini bullets. Anyone who has ever played with guns will know this thing, and it is not troublesome to make, the only thing that is a little difficult is the ratio of lead-zinc alloy. It should not be too hard, which would cause damage to the rifling and speed up the scrapping time of the barrel; It should not be too soft, it is easy to hang the bore, leaving fragments of lead bullets in the barrel, which affects the loading speed. However, at present, Qi Zu does not have a ready-made alloy ratio on hand, Hong Tao can only choose to use lead to make bullets first, hang the bore, and it will be better to smear some whale oil on the bullet, and then change it when the test comes out of a more suitable alloy in the future.

The principle of mini bullets is easy to understand, and the air gun bullets of later generations are standard mini bullets. This thing originated from the blowpipe used by the indigenous peoples, and in order to increase the pressure of the blowpipe, the aborigines made a grooved plug from the tail of the dart out of cork. When the plug is hit by a high-velocity air current, it expands, sealing the blowpipe and increasing the blowpipe chamber pressure, allowing the dart to shoot farther and more accurately.

This simple principle is more convenient to use on the bullet, no need to make the cork, directly cast into the shape of the bullet in a steel mold with lead water, add two circles of grooves on the bullet body, used to apply grease and reduce the friction area with the rifling wire, and then punch a round hole with a punch at the tail of the bullet. When the air flow of the ejection and the injection of the drug hits the round hole. The tail of the bullet will swell, sealing the gap in the barrel, which not only increases the chamber pressure, but also bites the rifling, forcing the bullet to rotate along the rifling and shoot out, killing three birds with one stone.

Four hundred meters! After adopting Mini bullets. The effective firing range of the front-loading rifled rifle is directly doubled, and the accuracy of firing at humanoid targets from a distance of 400 meters can reach 30 percent. If there is an optical sighting device, the accuracy can be improved a lot, and the main reason for the inaccurate shooting is not that the gun is bad, but that the target cannot be seen clearly. If the firing distance is shortened to less than 300 meters, the accuracy will increase exponentially. The effective firing range of the pistol has also increased to more than 30 meters, in fact, it is still powerful enough from 50 meters, and whether it can be hit depends on the shooter's skill, after all, it is more difficult to aim with a pistol.

In addition to a significant increase in range and accuracy. After using Mini bullets, the reloading speed is also doubled, and Hong Tao, a two-knife shooter, can easily reach the level of three rounds per minute. This is entirely due to the fact that the caliber of the Mini bullet is slightly smaller than the barrel, and there is no longer a need to wrap the skin and smash it into the barrel with a hammer. With the adhesive effect of these greases, even with the muzzle downward. Bullets don't fall out either.

"In the future, let's apply wax to the body of the bomb, and you have to get a hand and a body of oil that is too dirty to fight. Seriously affect the appearance of our army! In the face of the complete satisfaction of the Qi ancestors, Hong Tao was still a little dissatisfied.

The gun is a good gun, and it is very convenient to use, but he always leaks black oil from the barrel, and he rubs his body if he doesn't pay attention to it, which makes him very awkward. This problem is not difficult to solve. When making bullets in large quantities, you only need to roll the finished lead bullet with paraffin wax and graphite balls together, so that the surface of the bullet is coated with a layer of wax and there is no need to dip it in oil. Not only does it increase the loading speed and reduce rifling wear, but it also gets much cleaner.

"The manufacture of rifles, pistols must be carried out under the supervision of the Internal Affairs Service. Each pistol has a strict registration of the number! "With front-loading rifled guns, sailors and marines on board could abandon crossbows and be armed with rifles, but Hong Tao put forward higher requirements for gun management while mass-producing rifled guns. Rifles only need to have a production number and know when and where they were produced, but the production and use of pistols need to be strictly controlled.

Hong Tao is afraid of death, this kind of weapon will be leaked out sooner or later, the rifle is better, that thing is one meter and four long, and it is not very convenient to carry. But the pistol is different, just hide it in your clothes, and you can't even see it in your sleeve, if anyone is not very satisfied with themselves, get close to yourself and give yourself a look, no effort is in vain. With such a large-caliber soft lead bullet, it is not far from death when it hits the body, directly a hole the size of a bowl.

However, the Imperial Navy could not wait for the new flintlock pistols to be refitted, and in early May 1240, the Imperial fleet stationed in Mingzhou sent an alarm that the Mongol sailors were massing at the port of Dengzhou. The number of their warships has exceeded three hundred, and it is still growing, and almost every day there is a fleet of ships coming from the north of Korea, most of them new ships. At the same time, Cixi's Ministry of Supervision sent similar information from Guangzhou, that the Mongol Empire was gathering troops and supplies to the Shandong Peninsula from all directions, and that there was also a force operating north of Xiangyang, most likely to launch an attack on Xiangyang.

"It seems that we have overlooked another place, the Mongolian top brass is very smart, they are not only building ships in Dengju, Miju and Jinju, but the larger shipyards are estimated to be in the north of Goryeo. They succeeded in attracting our attention with this method, but as a result, the plank road was secretly Chen Cang, and the warship was secretly violent, and the Great Song Dynasty was caught off guard. This time, they are afraid that they will have to advance by land and water, first using land forces to draw the attention of the Great Song Dynasty, and then using sea forces to suddenly land south of the Yangtze River. ”

"Lao Kong, our enemy is very smart and bold, isn't this a bit of a desperate feeling, and he will finish his work in one battle?" Hong Tao really admired the decision-making level of the Mongol Empire, their thinking was very advanced, and they did not limit the navy to the aspect of fighting for sea supremacy, and actually wanted to carry out a large-scale landing war. And the execution is very strong, just do it when you think about it, and don't delay a minute. From this point of view, the Great Song Dynasty is far behind, for a while the main battle faction has the advantage, and for a while the main peace faction comes up again, and it is not over if you don't toss it a few times a year. But the fart decision didn't come out, except for reinforcing the cities along the Yangtze River with cement, there seems to be no accurate idea.

"It's just that I don't know where their landing place is, if they can attack the army of the Great Song Dynasty by land and water when they land, they will not be able to go back." Kong Pei was thinking more concretely, and he was thinking about how to achieve a bigger victory.

"Don't, don't expect the Great Song army to be able to withstand the Mongol army head-on in the plains, it's impossible, as long as a few boats of Mongol cavalry come ashore, they will definitely want to run to the city. At that time, even if we wipe out all the Mongolian sailors on the seashore, it will not matter, tens of thousands of Mongolian troops have come ashore, and it is still the prosperous plain area south of the Yangtze River, and the supply can be completed just by fighting and supporting the war. Once they are allowed to break inland, our ships and artillery will be useless, and at most we will rely on a few rivers to hold Guangzhou, Mingzhou, and Lin'an. If the south is all destroyed, it is useless to just defend these cities, and then the Great Song Dynasty will definitely transfer all the troops in its hands back to guard the old nest, and the Yangtze River defense line will be all in vain. Hong Tao thought more comprehensively, he had a much deeper understanding of the urine nature of the Great Song army and the imperial court than Kong Pei, don't look at Kong Pei's real contact with the Southern Song Dynasty army, he still can't see through their nature.

"Your Majesty means that we intercept the fleet of the Mongolian sailors in the middle of the way? But with less than twenty of our ships, I'm afraid we can't stop them, right? If the Mongolian sailors continue to move south regardless of casualties, we will be more passive if we can take care of the front and the back. Although their artillery range and accuracy are very different, they are difficult to deal with once they are numerous. Kong Pei was afraid that Hong Tao's brain would be hot, so he led the fleet to rush into the fleet of the Mongolian sailors to fight hard, facing hundreds of warships equipped with artillery, even if the ships of the imperial navy were good and the cannons were powerful, they did not dare to say that they were unscathed. Such a large-caliber solid bullet is enough to smash one or two.

"How the Mongol cavalry fights on the shore, our fleet fights in the sea, which is called treating others the way they do. It doesn't matter how many ships they have, we have the advantage in range, we can grind with them in circles. A large fleet of hundreds of ships, it can't all be together, right? How to command and how to coordinate and unify is a big problem. They will definitely be divided into several detachments, and we will start with their vanguard fleet, and eat one and then the next. As long as their fleet is disrupted and alarmed, the remaining ships will be handed over to the Great Song Naval Division. ”

"They don't have the courage to go to the sea for a decisive battle with the Mongolian sailors, don't they have the ability to defend the coast? If they don't even care about their own home, then we'll be fine. Lao Wen, you go to Lin'an again and explain the current situation to Zheng Qingzhi clearly. The Royal Fleet will arrive in Minnesota before the end of the month, and I hope to see him then. "Hong Tao doesn't have a foolproof way to solve too many warships at once, if it's a pure naval battle, no matter how many warships the other side comes, the Imperial Navy can kill them. But this time, the Mongolian sailors were obviously going to carry out a landing battle, and this thing couldn't be stopped, and they had to cooperate with the Southern Song Dynasty sailors.

"Your Majesty is going to personally command this time?" Wen Nan didn't have much say in naval battles, but he was very concerned about who commanded them.

"This is a national war, and it is not enough to win it, but we must minimize our losses. If you can find someone who knows more about naval warfare than I am, then I'll let Xian. Hong Tao knew what Wen Nan wanted to say, not only him, but many people in Jinhewan also thought that the emperor should stay in the palace, and it was best not to go anywhere.

(To be continued.) )