The elf grinned and flew around someone's head.

She seemed to be very happy to see Liu Yun enter the virtual illusion world, so she replied very cheerfully, "Yes, I am Zhibrain Dick, we have been partners for a few years, this is the first time we have met."

Liu Yun was also dizzy for a while, how did the good alien high-tech become an elf.

He asked depressedly, "Dick, aren't you the best companion for a Space Marine?" It seems that you are still from some pan-human alliance, and now you have become an elf, is there also an elf in the galaxy? ”

Zhi Brain smiled slightly, with the magic wand in his hand, with a slight wave, colorful magic fragments suddenly appeared around him, the stars are not magical, and the exquisite fashion on his body is also new, do you need to explain the reason, now it is the boss.

Liu Yun had no choice but to shut up with a wry smile.

The elf flew in front of him, Commander Liu unconsciously stretched out his palm, she jumped up very affectionately, and explained his question slightly, "In the entire galaxy, as well as in the pan-human alliance, there are indeed no elves, but there are extragalactic galaxies, as for my appearance, it is a secret."

Liu Yun didn't bother to pay attention to it, what Milky Way, what extragalactic galaxy, it is too far away for the earth, with the current speed of development, there is no thousands of years, there is no way to leave the solar system, as for colonizing the Milky Way and the like, we have to wait another 10,000 years.

At present, the artillery fire is more important.

Speaking of business, the elves also got serious, and introduced the performance differences between army artillery one by one, the smallest caliber artillery fire is a 40 or 60 mm mortar, and the smallest mountain artillery field gun is a 70 mm caliber infantry gun, followed by the common 75 mm standard infantry gun.

The caliber of the cannon, once it reaches more than 100 mm, is often called a heavy artillery, and its power has risen several steps, and if it is more than 150 mm, it is called a super heavy artillery.

Therefore, the 173 mm howitzer, in the early days of World War II, was indeed the most terrifying conventional artillery fire, and it was also a typical example of the German army's military-level suppressive artillery fire, its range and power far exceeded that of the 150 mm heavy gun, as for the Far East in 1936, it was even more invincible, even the thick-skinned warships could not carry a few cannons.

As for the 240mm mortar gun, it is still a little behind, whether it is range, power, or rate of fire, etc., it is far less sharp than this gun, and the only cannon that can beat it is only the train gun, but the number of that thing has never exceeded a single digit, and the rate of fire and accuracy are pitifully low.

Practice has always produced true knowledge.

Zhi Brain began to test firing various types of cannons one by one, the fastest rate of fire is still large and small mortars, followed by 75 mm mountain artillery, one to more than 100 mm, the rate of fire immediately decreased, the reason is that manpower is limited after all, and the weight of artillery shells has increased geometrically.

Taking the Japanese Army's Type 92 infantry guns as an example, the shells were only 3.8 kg, while the West Sichuan Type 72 shells were only 4.3 kg, as for the 75 mm shells, most of them were only 6.8 kg, and the 107 mm shells were directly doubled, and the shells were close to 20 kg, and as for the 122 mm shells, they directly broke through 30 kg.

As for the 150-mm shells, not to mention the terrifying 48 kg.

The newly released 173 mm artillery shells in Germany are as high as 68 kilograms, how much human strength is there, Liu Yun estimated that the physical strength of a normal person is 50 kilograms, the problem is that the artillery shells must be carried safely, if you are not careful, you will be blown to pieces by the shells in your hands.

Commander Liu suddenly thought of the navy, those artillery fires are very forked, and the caliber is even larger to the top, what 305 mm, 380 mm, 410 mm, and the unprecedented 460 mm, the weight of a single shell, isn't it to be calculated by tons.

How do they launch?

The elf thought for a moment, pointed the magic wand in his hand slightly, and immediately a destroyer appeared, which was the German "Rhineland", and instantly zoomed in, and came to the turret with Liu Yun, and found a strangely shaped loader, or a semi-automatic one.

It's so simple.

Liu Yun also suddenly realized, so he had an idea, why not simply transplant the automatic loader to the 173 mm cannon, only to see the small hand of the brain hook, the loading equipment automatically floated, and flew back to the heavy artillery with the two of them, but unfortunately, the size difference between the two is too big to match at all.

This is not difficult to the brain, after a period of magical modifications and adjustments, the rough loader has come out, but it is slightly bulky, and it also affects the firing degree of the cannon, what can I do?

The elf was hairy, and a semi-movable fixed frame was set up, and finally everything was done, and the effect was very good, and it could greatly increase the rate of fire, and the safety problem when carrying the shells.

Looking at the peculiar shape of the fixed frame, Liu Yun always felt a little awkward, remembering that in another time and space, there was no such strange shape at all.

What's wrong? That's right, it's mobility.

This sudden fixed frame, in addition to the weight of several tons, unless it is installed in advance, who can guarantee that it can be properly placed in a short time, and after it is erected, it is impossible to maneuver and adjust.

The mobility of the cannon is the life of the cannon.

A cannon that loses its mobility often means destruction, because as soon as the cannon fires, the experienced enemy artillery will immediately calculate the trajectory of the shell, and often after three or five rounds, the approximate firing direction is captured by the enemy.

If you wait until the enemy's artillery is finished.

At that time, the exposed artillery positions of their own artillery should be destroyed, so all experienced artillerymen, often after a burst of rapid fire, take the artillery and run away quickly before the enemy can react, the purpose is to prevent the enemy's artillery fire retaliation.

Is there any way that only you can strike at the enemy, and make the enemy unable to reach you? Liu Yun was a little distracted, and he no longer paid attention to the test of the cannon.

The elf was in touch with him, and immediately stopped the artillery experiment, suggesting "unless the range is long enough, or the defense is effective".

Commander Liu couldn't help but be stunned, and pondered carefully, this is really the case.

As long as the range is long enough, it is true that only you can hit others, just like the Type 72 infantry gun, competing with the Type 92 infantry gun, one is 3500 meters, the other is 2788 meters, and the one with a short range will definitely suffer.

Then the 170-mm heavy gun, which has a range of nearly 30 kilometers, is naturally superior to other artillery fire.

I remember that the Japanese army liked to put the cannon on the bayonet, simply put, it was to transport the parts of the cannon to the front of the battlefield through the low trenches, and then temporarily assemble them, with its suddenness and stealth, counterattack the enemy heavy artillery group with a long range.

So the elves are right, and artillery also needs to be "effectively defended", such as heavily armored tanks and warships, or strong permanent fortifications.

Liu Yun remembered that in the Russo-Japanese War in 1904, the Tsarist Lushun military port was very strong, and the Japanese army, known for its ferocity and tenacity, paid more than 50,000 casualties before it could barely occupy it, and effective defense was indeed very important.

As for the Qingdao military port during World War I, it was also known for its strong fortifications, and only 3,000 German soldiers caused heavy losses to the Japanese army, not to mention tens of thousands of casualties.

By the way, there is also the war barrier of the Strait of Gibraltar, which is known as "never falls", which has been controlled by the British Empire for hundreds of years, and indeed has never fallen.

Even in the 21st century, the barrier is still a symbol of British hegemony, and any warship that wants to pass through must get its permission, whether it is a battleship with a fork or an invincible aircraft carrier, there is no fear of such strong fortifications.

It is no wonder that in the early days of the all-out war of resistance, Lao Chiang always emphasized "resistance in echelons and stages, and space for time", because letting the enemy attack strong fortifications is a victory in itself, and as for the low quality of the defenders, the blood paid by the enemy is not heavy enough, that will be another topic.

Liu Yun suddenly remembered an incident that allowed the Japanese army to send heavy troops to attack, and it was a scene regardless of the cost, as if at the beginning of the all-out War of Resistance Against Japanese Aggression, there was such a time, and he couldn't remember which time it was.

Which time, exactly? Was it the Battle of Xuzhou, the Battle of Nanjing, or the Battle of Songhu?

By the way, it should be the Battle of Songhu.

The Japanese devils once boasted to the whole world that the Imperial Japanese Army would "occupy China within three months," so they had to take risks and take human lives to fill the gap.

Commander Liu touched his chin and thought with a sneer, especially in the later stage of the Battle of Songhu, the two sides had been fighting for more than three months, and the battle situation in the Songhu area was still in full swing, and it was understandable that the Japanese devils wanted to engage in some military adventures.

Then, it would be more normal to bleed a little more.

Well, when more than 100,000 Japanese troops are preparing to land in Hangzhou Bay, it should be when they are most vulnerable, if there are hundreds of 170 heavy guns lined up to welcome them, the scene must be very hot.

Liu Yun felt that he had a passion to design a more powerful heavy artillery, the best caliber should be 182 mm, and as for the weight of the shell, strive to break through 100 kilograms.

Because the heavier the shell, the greater the lethality.

The weight of a hundred kilograms, hum, other artillerymen may feel a little troublesome when reloading, but for ant robots, it is not a small meaning at all.

In the entire animal kingdom, ants are famous weightlifting champions, can easily lift weights a thousand times their own weight, and ant robots with the blessing of alien technology, weighing 139 kilograms, can easily do it even if they are filled with several tons of shells.

The 173-mm heavy artillery weighs 18 tons, and if it is on the march in wartime, it will be increased to 24 tons, let alone the 182-mm heavy artillery.

Therefore, whether it can reduce self-volume is the primary issue.

However, the weight of the cannon and the strength of the steel are inversely proportional to the life of use, according to the evaluation of the brain, the higher the strength of the steel, the lower the weight of the cannon, if the service life is not considered, the weight will be reduced again.

Liu Yun was a little hesitant, whether to design the 182 mm heavy gun as a disposable cannon, take the main gun barrel on the battleship as an example, their life has always been very low, it can be fired 300 times, it is powerful, if it is used too often, it often has to be scrapped after 200 times.

However, the strength of the steel, the elf said that there is no difficulty, in these years of mining, the ant robot has found a lot of rare metals, synthesized hundreds of tons of high-strength alloys, is more than enough.

As for the question of the longevity of the barrel, it is even more of a problem, since it proposes to use compressed air as a propellant for shells, and one kilogram of compressed air is equivalent to 8.5 kilograms of ordinary propellant.

According to the elves, there are three main benefits of air-compressed shells.

First, it avoids the burning of the barrel by the chemical propellant, thereby improving the life of the barrel in disguise.

Second, the preservation and combustion process of chemical propellants can greatly affect the rate of fire and its firing degree.

Third, it can reduce the cost of use.

The elf then demonstrated the difference between the two types of shells, ordinary shells will always appear smoke when fired, when fired three or five times, the barrel immediately has a tendency to heat up, once it exceeds thirty or forty times, the entire barrel has a dark and reddened phenomenon, if it is not cooled down in time, it can not be used at all, if it begins to heat up and redden, let alone what artillery accuracy, the cost of stealth will also rise rapidly.

However, with air compression shells, it is completely different.

Although the barrel of the cannon will also have the phenomenon of heating, but it did not fire nearly a hundred shells, there was no reaction at all, as for the level of dark redness, at least after firing a few hundred, so it is not necessary to know which is better or worse.

In addition, the normal rate of fire of a 170-mm gun is only 80 rounds per hour.

If you use air compressed bullets, and the reloading speed can keep up, the rate of fire will reach 6-8 rounds, so the practical effect of the two is simply very different, and there is no comparison at all.