"Finally, about its power and range: 70 mm caliber, firing 3.8 kg of high-explosive shells, is actually not far from the 5.5 kg high-explosive shells of the 75 guns, and it can basically be regarded as a level. The main flaws in World War II were that they were not effective against armored targets and concrete fortifications - but we obviously couldn't touch those things. Although the ultimate range of 2,700 meters is far inferior to the 8,005 of the 75 cannons, it is more than enough to bully the opponents of this era -- our current 12-pounder guns only have a range of 2,000 meters, and they are still the absolute masters of the battlefield. ”

Ma Qianshan cited a series of numbers that made the commanders of the military group below nod their heads, they had all fought in actual combat, and almost everyone had experienced the pain of being able to drag the cannon into the interior although it was good.

"Indeed, from the few battles we've had before, it's easy to win where the twelve-pounder can be deployed and used. But in many places, the bronze cannon could not be dragged up at all, and could only rely on the infantry to gnaw hard. The artillery basically did not play a role in the attack on the red city, and the enemy's fire points were solved by grenades and explosives packs. ”

"It's the same on the Luzon side, except for the help of warships by the sea, and after going a little further inland, the artillery will not be used at all -- the forest is too dense for the artillery to drag in."

Tang Jian, Wang Haiyang and others have made evaluations, and Feng Yufei is also good:

"No problem, the industrial team will develop an infantry cannon and the corresponding ammunition as light as possible - just use the Japanese Type 92 as a template."

"But the development of the 75 cannon itself must not be left behind, and the 'high' is the core in the high and low matching."

Although Ma Qianshan put forward the requirements for the 92-type gun, he did not lower the requirements for the 75 guns. In fact, he soon put forward many new requirements that Feng Yufei had not thought of:

"The development era of the 75 Cannon is still relatively early compared to its overall technical level. Therefore, although she already has a subversive advantage over her contemporaries, she actually has a lot of potential to tap, which is slowly reflected in the subsequent imitation and research and development process of various countries. We can use these improvements in advance to avoid some of the original problems of the Seventh Five-Year Plan. ”

said. Ma Qianshan took out a small notebook from his pocket and began to read it one by one—obviously he had thought a lot about it. And Feng Yufei immediately began to memorize the main points - but she didn't do it herself, but glanced at Xu Hui, who was stunned for a moment, and then immediately reacted, took out a small notebook and prepared to make a record. This action made a burst of chuckles in the conference room - don't look at Feng Yufei who took the initiative to find Xu Hui to force her to marry before, and invited the Women's Federation to come forward for this reason, but after getting married, she did not show any weakness at all.

In laughter. Ma Qianshan pointed to the slide picture and talked eloquently:

"First of all, the bolt part, the original 75 gun made a small mistake in this regard: while using metal integrated ammunition, it still used bolt gun bolt to strengthen the seal, which later proved to be too conservative in practice. The metal shell is actually enough to ensure that the gun chamber is breathless, so it is still directly used to use the common wedge gun latch in later generations to simplify the production and operation steps. ”

"The second is the gun mount part, the one-legged gun mount of the original 75 gun is completely a traditional cannon type, and the application range of the guide zhì gun is strict and narrow. The directional firing range is only three degrees to the left and right, and the high and low firing boundaries are even narrower -- the maximum elevation angle is only 18 degrees. This strictly restricts its performance. We have built a U.S. military's M2A3 gun mount, so that the directional firing range can be expanded to 30 degrees to the left and right, and the high and low firing range to at least 45 degrees. In this way, the range advantage of the 75 guns can be maximized, and at the same time, it will be able to gain some of the warp firing ability. ”

"In addition, when Miss Qiwu first came out, the muzzle brake had not yet been invented, and it was only added later. But if we design from the beginning with the muzzle brake taking into account the recoil-reducing effect. In terms of the number of designs in various aspects such as gun chamber pressure, hydraulic pipe withdrawal system and shell charge, it may be more generous than the original. Combined with the improvement of the firing elevation angle in the gun mount part, the firing range of our new gun must be much higher than that of the original 75 - I estimate that it should be extended to about 15 to 20 kilometers. ”

"That's a howitzer, the real 'one cannon erodes dozens of miles'."

Someone next to him immediately laughed, and Ma Qianshan also nodded:

"Yes, with our army's current firepower superiority, there is no need to study a howitzer for over-the-horizon shooting for the time being, but since the innate conditions of the 75 artillery are very good, it is not bad to let it have this function."

"If you shoot beyond the visual range, the requirements for artillery and means of communication will be much higher."

Someone next to him reminded, and Ma Qianshan said confidently:

"It's okay, in terms of training gunners, I think I still remember some of the courses in the Hefei Artillery School. In fact, I asked the new version of the artillery to have the function of curved fire, and I also hoped to restore the training in this area to the best of my ability, because the 75th Cannon basically had the characteristics of most of the later artillery, and it was used to train modern artillery tactics much stronger than the bronze cannon. Otherwise, if I delay any longer, in case something happens to me one day...... Our artillery heritage is about to be broken. ”

In the midst of everyone's "no taboo" scolding, Ma Qianshan said calmly:

"I'm not kidding, Dr. Feng was right earlier, Xiao Lang's injury should be a warning to all of us - many of our skills are irreplaceable."

After mobilizing everyone's feelings a little, Ma Qianshan waved his hand again and said with a smile:

"Okay, let's not digress, let's continue -- I estimate that after the official installation of the 75th Artillery, the biggest user is actually not our army, but the navy. Lao Ling, let's talk about the needs of the navy? ”

Ling Ning, the representative of the Navy who was named, shook his head with a smile:

"I'm not a technical expert, so I don't have a lot of professional advice. But I can confirm one thing: the 75 cannon is indeed the most suitable weapon for our navy, even if she does not make any changes, our navy will definitely have to purchase a large number of them, and ships and batteries will need them! ”

In fact, when Ling Ning heard that the industrial group was preparing to use the French-made 75 cannon as the main artillery, he immediately laughed toothlessly - there is no more suitable artillery for the navy than the 75 gun: the firing range is long and the rate of fire is fast, these are the two most critical numbers in naval warfare! As for the straight ballistics and weak curved firing performance, this is not a problem at all at sea level.

Moreover, compared with the appearance of "Miss 75" in history, the technology of ironclad ships has been greatly developed, and the 75 cannon is only used in land warfare. In this time and space, the 75 guns also have a big advantage - the large warships of the Joan Navy are all captured European galleons, and their opponents are only galleons. None of these ships had turrets, and the guns were placed in flat-deck gun cabins. The weight of the 75 cannon was 1.2 tons no more bulky than that of the traditional bronze gun, and its rate of fire of up to 15 to 18 rounds per minute was absolutely unmatched by any breech gun. The range of 8,500 meters far exceeds that of any firepower launcher in the world today, and even the theoretical range of the rockets developed by the Qiong Navy itself is only about 8,000 meters. Moreover, in this era when the means of sighting and communication are not well developed, unless such as rocket artillery, the ability of a single-barreled firearm to fire beyond the line-of-sight is actually of little significance, and the hit rate is too low.

So once the seven or five guns were able to get on board, it would mean one thing for the Qiongzhen navy: they would easily destroy any hostile target that appeared in the line of sight. In the past, except for one Qionghai in the Qiongzhen Navy, the other ships were not much ahead of the navies of the world, and they had limited advantages in battle. Ling Ning knew this most -- the "Earl" under his command was besieged on all sides by a group of Spanish warships, and his predicament has not been forgotten to this day. And now, even the clumsiest, oldest Spanish galleon, Ling Ning had the confidence to maneuver her to attack the entire Western fleet—as long as the ship was equipped with four or six "Seven-Five Misses".

"By replacing the bronze cannons with the seventy-five cannons, any of our large ships will have firepower similar to that of the Qionghai, and this advantage will ensure that our fleet is firmly in control of every inch of the sea that the navy can reach—unless the enemy has mastered similar technology."

Ling Ning said confidently, and Wang Ruobin, the owner of the shipyard next to him, also chuckled:

"Doesn't that mean that the navy will remain invincible for a hundred years? The technology of the 75 cannon is at least 100 years ahead of this era. Even if technological diffusion is inevitable, the dominant position of forty or fifty years should always be secured, right? ”

"By that time we should have gone to Europe......"

Everyone laughed and laughed, and finally passed a resolution on the upgrading of the artillery of the Joan Navy - agreeing to make the 75th and 92nd guns the main artillery of the future Joan Navy.

And after artillery, there is a discussion about firearms. The Joan Navy's guns also need to be upgraded - although their Joan I rifle is still the most advanced weapon of the era. After several actual battles, the reputation in the army is also quite good: fast reloading, accurate design, fast firepower, and a low failure rate. In the surrounding countries, including the Ming Dynasty, the Qionghai rifle is definitely regarded as a unique weapon in the world.

However, in the eyes of modern people, this weapon of the American Civil War era using paper-shell ammunition was actually just a temporary transitional product when it had just established itself in the Ming Dynasty, the processing technology had not yet developed, and the stock of resources and minerals was insufficient -- in history, paper-shell ammunition was also quickly eliminated.

And with the passage of time, when the technical strength and resource reserves of these time and space travelers have reached a certain level, those classic light weapon designs that have really been adopted by the armies of later powers, embody the killing ability of human society, and have experienced the test of two world wars are about to show their hideous colors. (To be continued......)