After listening to Lin Weiye's introduction, Xia Nan was happy, but also asked: "Since the explosive bomb is so good, why did we only use shotguns and solid bombs before?" And this bombardment doesn't sound particularly difficult on the technical principle, so why didn't it be directly equipped in large quantities at the beginning? ”

Lin Weiye touched his cheeks, which were hot from excitement, and said with a smile: "It's not as simple as you think." The accidental explosion of a cannonball www.biquge.info cannot be completely avoided in the 21st century, let alone in the more primitive 17th century. If the operation accidentally detonates the shell, and then triggers the gunpowder detonation, it is a disaster for the expensive warship, so before the invention of the bombardment cannon in Peksan, the warship commanders were very reluctant to let the explosive shells on board - the combat effect is not very good, and there is a high risk. ”

Xia Nan nodded: "This is a very real problem. ”

"As for the lack of bombardment guns before, the reason is also very simple: although the barrel is slightly shorter than the cannon and the weight is much lighter than the cannon of the same caliber, the 8-inch bombardment gun commonly used in the 19th century fired an explosive shell of about 30 kilograms, which is about 68 pounds according to the imperial system, and the weight of the gun body alone has reached 3 tons, not counting the gun mount of more than 1 ton. Such a heavy artillery, not to mention the Wuxiang-class with a displacement of 280 tons, even if the 500-ton Wuyi-class can be equipped with a few guns? ”

"68 pounds? I'm a good girl! Xia Nan was speechless, "The weight of this shell is almost the same as our mortar, right?" ”

Lin Weiye nodded: "The explosive bomb fired by the 10-inch mortar gun is 80 pounds, which is indeed not too much." ”

"I see. The bombardment artillery is too heavy for both the Wuxiang and Wu Yi classes, and instead of barely stuffing a few of these heavy guns, it is better to install more light Caron guns, so as to give full play to their mobility advantages on the premise of ensuring sufficient firepower intensity. ”

"That's right. The Wuxiang and Wuyi classes are equipped with bombardment guns, which are small horses and carts, and they are powerless. Now the 1000-ton large battleship is about to be launched, and with the right platform, the bombardment can come into play. ”

Xia Nan asked expectantly, "Did you get this cannon out?" ”

Lin Weiye thought for a while: "The principle of this cannon is not too complicated, the technical details have been verified on mortars and howitzers, and the difficulty lies in the casting of the barrel ......."

"What's the difficulty of casting the barrel?" Xia Nan asked in surprise, "We have cast all the cannons of different lengths and sizes, isn't it just to refine the white iron, and then cast the cannon with an iron mold?" ”

Lin Weiye became serious: "Climbing the peak of technology is a never-ending process, casting such a large heavy artillery is a new challenge for me, can building a small car be the same as a heavy truck?" The biggest problem is that the inner and outer walls are too different from the inner and outer walls because of the thickness problem and the inner and outer surface area, and the cooling rate of the inner hall and the outer surface is not the same, resulting in the outer layer cooling first and the inner layer cooling later, especially when the inner layer is finally cooled, it is easy to crack when the inner layer is stressed when it is finally cooled......"

Xia Nan seems to understand whether he understands or not: "The outside of the gun barrel is cold first and the inner wall is cold, this truth is easy to understand, what is the matter with the greater stress and easy to crack, and what will be the consequences?" ”

"To put it simply, the inconsistency of internal and external cooling will produce cracks, which may not be easily detected by the naked eye, but during the battle, the barrel will heat up and expand due to repeated shells, and the cracks will get bigger and bigger, and finally lead to explosions!"

Xia Nan was shocked: "Such a big cannon will kill a lot of people if it explodes!" ”

"What's more, if such a cannon is loaded into the gun deck, the entire gun deck is all-through, without any cover inside, and the explosion of one gun will cause other gunpowder to detonate, and the whole ship will be reimbursed!"

Xia Nan asked tentatively: "It's so dangerous, then let's not engage in this bombardment, right?" Anyway, when all these ships in the shipyard are launched, 12 Wuyi-class and two thousand-ton warships will form a fleet, and more than a dozen Wuxiang-class patrol ships will be brought to protect the perimeter, I don't believe that Zheng Zhilong will not be able to do it. ”

Lin Weiye looked at him with hatred: "You are just pursuing it like this, it is simply a small peasant consciousness!" If the 1,000-ton warship still has the same weapon configuration as the 500-ton Wuyi-class, but it is just a few more guns, why should we build such a big ship, and can't we build a few more Wuyi-class or even Wuxiang-class ships for the same money? From World War I to World War II, why did the maritime powers desperately build cruisers, battleships, aircraft carriers? Because without large surface ships as the core, it is not a qualified navy of a great power! ”

Xia Nan quietly wiped the spittle on his forehead, trying to calm down the partner: "Big brother, we are just a local armed force with a band in the Ming Dynasty now, and we are considered a warlord and a big navy...... Far from it, right? ”

"Okay, I won't mention to you the concept of a great power navy and a blue-water navy, but the most realistic question at hand: compared with the armed merchant ships of the Dutch, the Wuyi-class battleship itself has some forward-looking advantages in terms of design, and the advantages of artillery may be more obvious, but it is not enough to be crushed, right?"

Xia Nan nodded: "You are responsible for the technology, you said so, I have no opinion." ”

"Then the question is: since the 13 Dutch armed merchant ships plus Liu Xiang's more than 50 pirates have lost to Zheng Zhilong, then why do you think that our 12 Wuyi-class ships and 13 Wuxiang-class ships will definitely be able to defeat Zheng Zhilong?"

Xia Nan was asked and groaned. Although William led 13 Wuxiang-class patrol ships to repel the Dutch easily, the Dutch had been exhausted by Zheng Zhilong's fireships and crowd tactics before, and their combat effectiveness was greatly reduced, so it could not be concluded that the Qiongzhou battalion VS the Dutch would win.

Although the naval battle of Liuluo Bay in this time and space was guaranteed because of the participation of the Qiongzhou battalion, in another time and space, Zheng Zhilong defeated the Dutch and Liu Xiang coalition forces with real swords and guns-perhaps because of his own appearance, Zheng Zhilong got the Karon cannon that did not exist in history, and made a wrong command with a hot head, and then fell into passivity-In this way, with the current strength, defeating Zheng Zhilong is not a sure thing, if he repeats his old tricks and blocks the Qiongzhou battalion fleet in a narrow harbor, Having lost the advantages of artillery and mobility, it is not alarmist that the tragedy of Liuluowan will be repeated in the Qiongzhou battalion.

Thinking about it, a cold sweat broke out on Xia Nan's body, the previous battle was too smooth, and he was a little paralyzed. Zheng Zhilong is not an NPC in the game, he can defeat Li Kuiqi, Zhong Bin, Liu Xiang large and small sea lords with his own strength, and beat the Dutch dare not set foot on the coast of China, how can he be so easy to deal with?