As soon as the Russian army ran downstream, it was in the arms of the gunboat, the gunboat adjusted the speed of the boat, went downstream, and called the Russian soldiers with machine guns, and the terrified Russian soldiers desperately fled away from the river bank, they thought clearly, although the gunboats were powerful, they could not go ashore!

The Russian soldiers miscalculated, not only did the gunboats have artillery and machine guns, but each ship also carries 50 heavily armed soldiers, and there are 800 soldiers on 16 gunboats, who disembark from the gunboats and chase the Russian soldiers behind.

Just when the battle situation was one-sided, Zhang Yao in the city suddenly ordered his subordinates to prepare war horses and go out of the city!

The soldier asked, "There is no need to go out of the city to pursue the enemy now, our fleet is enough to deal with them." ”

Zhang Yao said: "I didn't go out of the city to chase the enemy. ”

The soldiers under him had to ask carefully, Zhang Yao had already taken ten warriors and rushed out of the city on fast horses, and the horses they rode were also taken from the Russians, and the speed of these horses was very fast, so Zhang Yao had already taken ten warriors out of the city.

Zhang Yao's target was the Russian artillery, and he guessed that the Russians were likely to use brand new artillery, and the Russian army was defeated, and he would definitely not keep these four artillery pieces for himself, so he had to take them back before the Russians transferred them.

Zhang Yao led people to rush to the position of the artillery, and saw four behemoths moving on the grass from a distance, the speed was not slow, Zhang Yao thought to himself: "The heavy artillery of the Russians actually did not sink into the ground, I don't know what tricks were used on the road." ”

Eight horses pulled four artillery pieces and fled to the upper reaches of the river, the location of the Russian artillery was relatively remote, so the gunboats did not find them, if Zhang Yao hadn't arrived in time, they really let them escape, the Russian artillery carriage sat on the gunners, they saw Zhang Yao chasing after them, they raised their rifles in their hands and shot at them.

Zhang Yao held a semi-automatic rifle produced by the Beijing ship in his hand, waved it left and right, and ten soldiers left and right, and outflanked the gun truck, the purpose of this is very simple, the gunner on the gun car will not be very good, if you chase from behind in a straight line, the gunner does not need to calculate the amount of advance, and the soldier will be easily hit, but if you outflank the left and right, it will be different, the gunner must consider the amount of advance when shooting, and also correct the bumps of the gun car, so that the hit rate is greatly reduced. Zhang Yao ordered: "Knock out the ** who is driving the car first!" "The soldiers under his command were all trained to shoot immediately, and their skills were extraordinary, and after a burst of gunfire, all the charioteers were thrown to the ground, and the horses pulling the cart stopped without the command of anyone, and the remaining gunners got down from the carts, leaned on the cannon body, and struggled to the death, and were soon all killed. Zhang Yao stepped forward and took a closer look at the artillery, the caliber was indeed one size larger than the original 75 mm gun, and the biggest change was the wheels, the wheels were no longer wood wrapped in iron sheets, but thick rubber tires, no wonder these four guns did not sink into the ground.

In this battle, the Russian army was killed 487 people, 549 surrendered, and the rest fled back to the camp near the Wandashan fortress in disarray.

Lin Yuan was most interested in the four artillery, and when the flood receded, Lin Yuan left four gunboats to cover in Lahassusu, and the rest returned to Sansa City with those four cannons.

At this time, Luo Chaoying had taken a train from the Tianjin Machinery Bureau to the city of Sanxing, and Lin Yuan's strategy was that where the troops hit, the railway would be repaired, so the railway line had been widely established in various parts of the Northeast, coupled with the original railway of the Russians, the railway in the Northeast region had a considerable material transportation capacity.

Luo Chaoying first asked someone to bring a cannonball, he measured it with his hand, and said: "The long-diameter ratio is close to the cannonballs of our time, and it seems that the Russians have a good understanding of gas dynamics." ”

Luo Chaoying asked people to disassemble the artillery, he took out the vernier caliper, measured it between the two rifling lines of the muzzle for a while, and then said: "One hundred and five millimeters, such a gun is not small!" It seems that the Russians' steel smelting skills have taken a big step! ”

Lin Yuan said: "Didn't you plan to design and manufacture this caliber artillery a while ago? ”

Luo Chaoying kicked the rubber wheels with his foot and said, "If we had such a rubber tire at that time, wouldn't we have built it?" At this time, the wheels are still made of wood and iron, and it is easy to get stuck in the mud, not to mention, this kind of wheel cannot absorb shocks and cannot maneuver quickly. ”

Lin Yuan said: "Don't worry, we will be able to make rubber soon." ”

Luo Chaoying said: "That's great, at that time, we can even make a 155 mm cannon howitzer, and the firepower will far exceed any artillery in the world today." ”

Luo Chaoying said as he instructed people to unload the barrel of the artillery, and then glanced at the connection between the barrel and the frame, and said with a smile: "The rate of fire will not be very fast if we use a spring-type retracting machine. Lin Yuan said: "Elder Luo, what we need to design now is not a large division-level support artillery, but a weapon that can provide firepower for individual soldiers." ”

Luo Chaoying was stunned for a moment, and Lin Yuan explained: "Our next combat target is the Russian army in the mountains, the roads in the mountains are narrow, and it is inconvenient for large artillery to maneuver. ”

Luo Chaoying asked, "What kind of weapon do you refer to to providing firepower for individual soldiers?" ”

Lin Yuan said: "Take the infantry equipment of our era as an example, such as the 40 rocket launcher. ”

Luo Chaoying said: "The range of these weapons is relatively close, such as the 40 bazooka, the distance of the gauge is only 250 meters, and it is rarely used 100 meters away in actual combat." Lin Yuan said: "It doesn't matter, many cases of mountain combat are close-range operations, and they don't need much range." ”

Luo Chaoying said: "In our time, individual rocket launchers are mainly used for anti-tank, rockets widely use metal jet armor-piercing warheads, since there are no tanks in this era, then we can improve the warhead, but, the most important thing is the propellant, we make artillery shells, the propellant can be made with black powder, but the rocket needs to be propelled with solid fuel, and the propellant needs to be made into blocks, so this can't use black powder, do you know what propellant should be used?" ”

Lin Yuan said: "I know that nitrocellulose and nitroglycerin are generally used for solid rocket propulsion fuel. Luo Chaoying said: "Nitrocellulose Tianjin Machinery Bureau can produce it, although the output is not high, it is enough, but nitroglycerin, where can we find it?" ”

Lin Yuan smiled: "Why are you confused, our petroleum industry has started, oil is simply a cornucopia of the chemical industry, many chemical raw materials can be found from it, nitroglycerin is made by the reaction of glycerin and nitric acid, what is glycerin?" Isn't it glycerol? We can use catalytic hydrogenation to produce glycerin, and our nitric acid is also available, isn't it a matter of course to produce nitroglycerin? ”

Luo Chaoying said: "If you say that, I'll go back and prepare, and soon we will be able to build a batch of individual rockets." ”