The sun is shining and the windows are bright. In the subtle morning breeze, the sound of a sonorous metal hitting comes from the shipyard factory in the distance, bringing some strange atmosphere to this originally quiet little house.

"Submarine? What you said is the kind of gadget that appears underwater and is used for sneak attacks?" Frick asked suspiciously. Qingying nodded and said, "Yes, I remember this new recruit came out a long time ago." Frick twisted his beard with his fingers, his soybean-sized eyes narrowed slightly, and said, "But I remember that there seems to be no regulations on the construction of such gadgets in the Navy Law. What do you want to do with this thing?" Qingying snorted, "Is this my personal hobby not okay? With this thing, you can smuggle at sea and smuggle some drugs, which is much more profitable than the honest shipbuilding."

Seeing Frick's face full of shock and a look of ghosts, Qingying couldn't help but roll his eyes. The Germans were too old-fashioned and rigorous, with no other cells at all. What he said casually made the guy believe it and made this expression of dying! He shook his head helplessly and said, "What I said just now is just a joke. I need a submarine for a more profound purpose. This army has appeared in the navy for decades. There is no way that there is not even a designer who knows about submarines in this shipyard, right?"

Frick breathed a sigh of relief and said, "Your Highness, you scared me to death just now. I just said, the royal family has nearly two million marks of money every year. Now that you have this shipyard again, how can you be short of money? As for the submarine designers..." He smiled slightly, and then said, "Your Highness, you are the right person. The little Khedira in my team is a professional talent who is proficient in this field! When he first studied submarines, he wanted to use them to smuggle drugs to change his living conditions. But later, since the empire began to vigorously develop maritime shipping, he found that the rewards of honest designing merchant ships were also abundant, so he taught himself the design of surface ships and became a member of our team. However, he did not give up his skills on the submarines at all, and always showed off his design in front of us."

Qingying was surprised and said, "So, Mr. Khedira, is he here now?" Frick nodded and said, "He is in another office on the top floor. If His Highness wants to see him, I will take you there."

Climbing the stairs, panting. A few minutes later, Qingying and Frick walked into another room. The same flower and grass bonsai and the same long cabinet lined up, but the protagonist sitting in the seat became a man in his thirties. Before the guy could ask questions in confusion, Frick had already taken him one step ahead of him and told his old partner the whole story.

After listening to Frick's story, the guy's eyes gradually narrowed; but he did not show the unexpected surprise expression, but instead brought a hint of confusion and confusion in his eyes. After a while, he turned his head slightly and said, "Your Highness, Frick should have told you, right? I do have a lot of experience and attainments in the field of submersible ships, but if I don't know the purpose, I can't start designing it. I wonder why your Highness wants to make this thing?"

After the introduction just now, Qingying already knew that the person in front of him was the little Hedira in Frick's mouth. Faced with his inquiry, Qingying said seriously: "Mr. Hedira, according to the assessment made by the Navy Staff, the submarine will play a significant role in future wars. Therefore, I want Germany to be one step ahead and lead other naval powers in this field." Because of concern that the guy who had never met in front of him would not buy his own account, Qingying pulled up the banner of Tirpitz.

Hearing Qingying say these words, the two people next to him put away their slightly relaxed expressions. For two years, Qingying has gained fame in the ship design industry. The ideas and ideas he proposed have made the gold medal engineers who have been immersed in shipbuilding for decades suddenly understand. No one dares to underestimate this young man who has just turned 13. He has keen insight in the navy that ordinary people can imagine, and he has a close relationship with the Navy Chief of Staff Tirpitz. If he says that the Navy Staff has such a new assessment, it is probably true!

At this point, Khedira showed excitement on her face and said, "It's amazing that the Navy is actually interested in smuggling ships like me. However, when I first studied it, I didn't add any war elements to it; now the Navy needs such a gadget, so I should have to put some other things on it. Am I right?"

Qingying nodded and said, "That's right. Since the submarine itself is very small and is not suitable for artillery battles with enemy warships, the Navy's General Staff decided not to install cannons on it, but to be equipped with torpedo launch tubes that can fire torpedoes underwater. If this submarine that launches torpedoes can be built, we can let it dive into the water and attack the enemy's warships; as long as it appears within our attack distance, it can be used to rush to it!"

Khdira shook her head in disappointment and said, "Your Highness, if the Navy's idea is like this, then I can say very responsibly that no one in the world can create this thing. Theoretically, this idea is indeed feasible; but if it is implemented in detail, there are two problems that are difficult to solve."

"The first is the problem of submarine power. Although the submarine has now evolved from the most primitive human-powered to steam propulsion, its speed is still unbearable. At present, the submarine powered has a surface speed of only 3 to 4 knots, and its endurance is only a pitiful 150 nautical miles, and its speed and range are even less than one-third of the oldest patrol gunboat! This low speed and range directly limit the range of activities of the dead submarine, making this weapon only move near its own military port and cannot go to sea to perform tasks. In addition, since this steam power is coal-burning and requires a lot of air; once the submarine dives, it is full of sea water in all directions, the boiler cannot continue to operate. If the submarine is driven by an electric motor, the consumption is too high, and the endurance is only one-third of the steam power."

Khedira said: "The second is the problem with the torpedo itself. At present, the range of torpedoes is too short, with an effective range of only a few hundred meters, which greatly limits its scope of application. For example, the 350mm torpedo I, which was in service five years ago, had a range of only 400 meters; and even the latest 450mm torpedo has a range of only 1,200 meters. This distance is not enough for the vast ocean, not to mention that the submarine cannot move underwater! Unless the opponent's warship happens to pass by the torpedo tube of our submarine, there is no chance of attack at all! Your Highness is proficient in the navy, and I don't think I need to say it again. If the two problems of submarine power and torpedo range are solved together, it is impossible to use a submarine to attack the opponent's surface warship."

"Wait, Mr. Khedira, what did you say just now? The submarine uses coal-fired steam as power?" Qingying opened her mouth wide, as if she heard some unbelievable news, and said in surprise, "Did you make a mistake in somewhere? How can this thing be used on a submarine?" Khedira said in surprise: "If you don't use steam power, what should you use? The product of compressed air engines is not as effective as a steam engine. Coal-fired boiler and steam engine are the most standard power of naval ships."

Qingying added his forehead with his hands and spoke in a helpless tone: "Mr. Khedira, the reason why naval warships use steam power is that steam power appears early, and the other is that the space in the ship is relatively large, which can meet the power combination of boiler and steam engines. However, on submarines, specific problems need to be analyzed in detail. Traditional steam power is a high-power equipment, and now it is a completely waste of money to install it on submarines. Why can't we change our thinking and consider amplifying the gasoline engine on the car and then install it on submarines? As far as I know, this kind of thing is much better than a pocket-sized coal-fired boiler, right?" Qingying did not jump to the diesel engine in one step, because the diesel engine technology is truly mature, and we have to wait until the time when the dreadnought appears.

Khedira's eyes lit up and said in surprise: "Yes, I really forgot that there is a gasoline engine. This kind of low-power internal combustion engine is not suitable for use on warships, but it can just play a role in a sampan-level submarine! If Benz and Daimler can provide gasoline engines with enough power, I can definitely try this new idea. However, gasoline engines still consume air when working, what should I do after the submarine dives? Just relying on a thin snorkel can still not meet the consumption of gasoline engines."
Chapter completed!