With the participation of major arms companies, the Stockholm International Defense Exhibition has truly become an international arms exhibition and trading platform. Carl, the owner of Bofors, was overjoyed and arranged a large private room at the Shelais Lantern Hotel for a small gathering. The participants are all senior management and shareholders of the company.

Karl raised his glass and said happily: "Everyone, we have made this glass of wine and wish the Stockholm International Defense Exhibition hosted by us a complete success!" ”

Seeing that the owner Carl was so happy, everyone stood up unceremoniously, and the goblet was filled with the famous French Bordeaux red wine, and everyone drank it all after clinking glasses.

Philip sighed secretly in his heart, thinking that in China, this French Bordeaux red wine was a high-end foreign wine, at least thousands of yuan a bottle, a more expensive tens of thousands of yuan a bottle, and even Lafite in 1982, fried to more than 200,000 yuan a bottle, ordinary people don't even think about it.

Seeing that Philip was thoughtful, Carl smiled and asked, "Philip, my friend!" What are you thinking? Are you homesick? ”

Philip sneered, "It's not homesick. I'm thinking that we Bofors should develop a new type of artillery, after all, this is our company's main business, if we don't have an artillery product that can support the family, then our waist is not straight! ”

Karl looked at the crowd and said, "Philip is right. Our company started with artillery, and as the organizer of the Stockholm International Defense Exhibition, we need to have artillery products to show the strength of our company. It's just that developing an advanced artillery piece is easier said than done. Guys, do you have any good suggestions? ”

At this time, Nelson, chief engineer of Bofors, spoke: "Mr. Carr, I think we should develop a large-caliber anti-aircraft gun for field air defense of naval ships and the army. Now that all countries are vying to develop the aviation industry, the performance of fighters and bombers is becoming more and more powerful, so the shield of anti-aircraft artillery will certainly develop rapidly, and if we can successfully develop a small-caliber anti-aircraft artillery, we will certainly be able to achieve good sales results in the international arms market. Personally, I prefer to develop a 75 mm caliber single-barreled rapid-fire gun, which is powerful for all kinds of fighters in the air, and one shell is enough to shoot down any fighter. ”

Carl nodded frequently, and waited for Nelson to finish before he continued: "Nelson is right, we should develop new products in the direction of large-caliber anti-aircraft artillery, and this kind of product should have great development in the international arms market." A few years ago, our company was commissioned by the Navy to develop a 20 mm caliber fully automatic shipborne anti-aircraft gun, and later let the military find that the power of small-caliber anti-aircraft guns is limited, the year before last, the Navy asked the company to design a ship-based anti-aircraft gun with enough power to kill enemy planes with a single shot, the caliber was set to 40 mm, and now this kind of gun is basically about to succeed. If a larger caliber anti-aircraft gun is developed, is it necessary? Philip, what do you think? ”

When Philip talked about the development of the 75mm anti-aircraft gun, Philip was thinking about whether anti-aircraft artillery was better with a large caliber or a small caliber. Now Bofors and Krupp are in the period of cooperation, and due to the major differences in the design concepts of Bofors and Krupp, Swedish designers have been focusing on the development of light artillery, while German designers are biased towards the development of heavy artillery. Unexpectedly, Nelson, the chief engineer, also began to be biased towards the development of large-caliber anti-aircraft artillery.

But in later real operations, small-caliber anti-aircraft artillery performed even better. Due to the light weight of small-caliber guns, which could accompany the advance of armored troops, Bofors later began to improve the towed 40-mm field anti-aircraft guns suitable for army equipment based on the ship-based M32 40-mm guns. This kind of field anti-aircraft gun uses a water-cooled barrel, and the actual body-to-barrel ratio is 56 times, which is customarily called 60 times. As soon as this sample gun was interviewed, it attracted the attention of the military forces of various countries around the world at that time, especially the armies of various countries that were in the process of forming armored forces. This new type of army towed antiaircraft gun has two major advantages, one is that it has strong mobility and can act together with armored troops, and the other is that it has added to the gap in firepower between light antiaircraft artillery and heavy antiaircraft artillery for a long time, and its power and firing height are better than that of 20 mm light antiaircraft guns, and the rate of fire is higher than that of heavy antiaircraft guns of more than 76.2 mm, and it can effectively deal with air targets at medium and low altitudes.

Of course, these are classics of anti-aircraft artillery of the Second World War era. As a Chinese ordnance expert, Philip was involved in the Chinese Ludun 2000 short-range air defense weapon system. This new type of domestic short-range artillery air defense system vehicle uses the 8×8 TA5450 variant military truck as the chassis, 7 barrels of 30 mm rotary tube artillery and Tianyan or Thunderbolt missiles, and the overall combat effectiveness is very strong.

The remote-controlled rotating turret of the Type 730 7-barreled 30 mm rapid-fire gun mounted at the rear of the car has two magazines, one for anti-personnel high-explosive grenades and one for deshelling armor-piercing shells, each containing 500 rounds of ready to fire. The empty shell after firing is ejected through the front of the gun carriage, the rate of fire of this domestic 730 type 30 mm seven-barreled rapid-fire gun is 4000 rounds / minute, the maximum firing range is 3000 meters, and the general blocking distance is 1000-1500 meters, which has the characteristics of fast reaction speed, good reliability, high hitting accuracy and great power. In addition, due to the overlapping working time of each barrel of the gun, it also has the characteristics of stable rate of fire, long life of the barrel and high reliability.

The 40 mm L/60 anti-aircraft gun, developed in 1936, is the most prestigious product of the Bofors company. Its barrel is water-cooled, with a rate of fire of 160 rounds per minute. The improved L/70 in 1948 had a rate of fire of 330 rounds per minute and an anti-aircraft range of 4 km. The 75 to 100 mm anti-aircraft guns developed by other countries can only attack long-distance targets with slow changes in distance due to their slow rate of fire, that is, they can only attack bombers, and it is difficult to pose a threat to flexible fighters and attack aircraft. Anti-aircraft guns of the 75 to 100mm class were important air defense forces of countries in World War II, but they became famous in the war not for air defense tasks, but for anti-tank missions.

With such a comparison, Philip already knew it. When Karl asked him, he said unhurriedly: "Mr. Karl, I have an idea, that is, to use the principle of the Gatling gun to develop a 30 mm caliber rotary cannon, this kind of cannon can be composed of five to seven or even more barrels, using electric drive, several barrels are connected together for good stability, reduce the vibration of the gun barrel, and at the same time, there is actually only one gun barrel fired at the same position at each moment, and the same as the single-barreled gun, there is no irregular recoil of the combined gun, and the vibration of the gun carriage can also be reduced." Theoretically, it can reach a rate of fire of tens of thousands of rounds per minute, and the range can also reach more than 3,000 meters. It can form a dense killing area and can hit multiple batches of targets. It can be installed on ships, vehicles, and even aircraft, which is more versatile. With such heavy fire, I don't think any target will be able to escape, I call it the Vulcan machine cannon, which is something I have studied for a long time. ”