Walking through the steel trestle paved with wooden boards, Xu Jun and his party stepped on the deck of u1001.↑, unlike the flat and open upper decks of the submarines in the past, the deck of this new submarine is slightly narrower. The steel deck with anti-slip lines and drainage holes extends along the central axis of the submarine to the command tower, and then bypasses from both sides of the command tower and then extends to about ten meters in front of the bow of the boat. The widest part of this narrow deck is only 1.5 meters, and the narrowest position is on both sides of the command tower, only 50 centimeters wide, just allowing a sailor to pass.

The hull outside the deck shows obvious arc lines, from both sides of the deck down to the water surface. The cross-section of the ship is circular, which is just the first impression this submarine leaves on the visitors.

In the past, German submarines had a very complex cross-sectional structure, and they only added a bunch of required compartments, fuel compartments, ballast compartments, head and tail balance compartments, and the overall appearance is still inseparable from the influence of surface ships. In general, it is a warship that can submersible, and the water surface is the home field of this ship. The underwater line type is just a secondary issue in the designer's mind. The overall design of German submarines focuses more on the maneuverability and seaworthiness during surface navigation. The surface speed and endurance were the hard indicators of a submarine at that time.

Although the xxi submarine adopts a concept that transcends the times, the designer's ideas still fail to bypass the original thinking mode. Although this submarine adopts a cross-age double-layer shell design, the linear model also adopts a lot of fluid dynamics achievements at that time, and many details are obviously optimized. However, due to the inertia in the thinking mode, the submarine was finally a little short of the styling design. The designer equipped the submarine with an unnecessary wave breaking bow, and also adopted the corresponding design in the hull structure.

Although this submarine crossed the times in concept, the design of the boat exposed the limitations of the designer's vision at that time, making the super electric craft that could have become a legendary one that could only become an inappropriate transition model, far lower than the actual value of the concept she represented.

In Xu Jun's view, this sharp blade-like bow is completely a snail. Instead, it weakens the potential of the submarine. Since the submarine generally adopts a double-layer shell design, it means that any change in the shape of the non-pressure shell outside the inner pressure-resistant chamber will not affect the internal layout. Xu Jun cut off the ten-meter-long blade-shaped wave-breaking bow structure in front without hesitation. The steel component will only affect the submarine's underwater maneuver. Just imagine the difference between a chopstick and a spoon when stirring in the water. You can find out how much resistance this slightly forward-tilted wave-breaking bow will cause to the submarine's underwater steering maneuver.

Xu Jun changed a round and blunt shell at the original bow of the boat. Because the internal structure was difficult to further optimize, the foundation of this submarine could not be modified into the popular water droplet line type in later generations. Because of the aspect ratio, Xu Jun could only choose to take a step back. He replaced the whale-shaped bow of the later generations with a popular whale-shaped boat, and tried to get close to the advanced conventional submarines in later generations in line.

Xu Jun spent all his efforts to replace the bow of this boat. There was no similar information in his database. He could take out the design drawings of mainstream diesel-electric submarines from the 1950s, but the performance of those submarines was not much improved than that of xxi, and some designs were even worse than that of this Nazi era submarine.

Xu Jun could only draw a basic sketch based on his original personal memory to make improvements for the design bureau. A group of fluid dynamicsists and mathematicians spent a week to finally calculate the optimization plan they thought was the best. At the same time, the head of state's mind opened the eyes of these scholars, opening a closed window for them, and seeing another new development path. In fact, these problems have been revealed in the previous torpedo design, but no one has conducted further research on this. This time, Xu Jun's design completely unveiled the veil, and experts began to prepare for greater discoveries in this field.

The new bow of the boat has been proven to greatly improve the submarine's underwater performance. The design of the Head of State surpassed the entire era. No one has ever proposed a similar concept in the past. A new submarine dominated by underwater combat. After reading the design drawings, Deniz wished he could immediately run to the commander-in-chief to worship the apostle.

Since Xu Jun has improved the bow of the xxi type boat, the structure of the stern of the boat must of course be changed accordingly. However, Xu Jun found that the design of the xxi type boat stern has reached the level of the 1950s, which can be said to be the peak that the current technology can reach. In addition to being consistent with the overall model of the online type, the structural arrangement has deviated from the usual surface ship model of German submarines.

If a comprehensive change is made like those submarines in later generations, it will definitely affect the structure of the entire tail section. Moreover, in the absence of more powerful engines, dual-machine dual-axis propulsion is still the mainstream design of conventional diesel-electric submarines in the world for a long time.

Of course, Xu Jun knew the single-axis large inclined propeller, and also knew that the cross and x-shaped balanced tail rudders were balanced. The problem was that these technologies had exceeded the scope of his database, and he could only make some experimental improvements based on the technology and memory he mastered. Xu Jun optimized the external lines of the stern as much as possible, and strengthened the mechanisms of the horizontal rudder and the vertical rudder on the original basis. He expanded the area of ​​the rudder surface. He also installed two deflectors similar to aircraft flaps on the horizontal deflector wings of the fixed oar shaft, which can increase the effectiveness of the horizontal rudder during high-speed navigation. At the same time, through the opening and closing of the deflectors on both sides, it can also be used as an emergency rudder to adjust the course and balance of the submarine.

Under Xu Jun's modification, this submarine has truly become a transitional version, a transition of an era. According to Xu Jun's estimate, it can reach the level between the 1960s and 1970s. Of course, it is only his personal opinion. In fact, there should be a big gap with those three generations of mainstream submarines. However, in this era, this submarine will be a nightmare for all enemies. Xu Jun firmly believes that with the performance of this submarine alone, no escort ship can match it. If controlled by a cunning captain, the enemy will not even know who attacked him until the moment he sank.

Xu Jun corrected the cross-sectional shape of the submarine to make it closer to a circle. Of course, it is somewhat impractical to reach a perfect circle. This boat should be considered closer to an oval, and looks more plump than the original egg shape, so the maneuverability underwater has been greatly improved.

"Please go here, my head of state." Captain Heinke stood by the command tower and waited, temporarily adding a steel cable fence here for safety.

Xu Jun did not make much changes to the command tower. He liked the original command tower shape of the xxi type very much, so he basically retained the original basic design, but made a little correction in some details. The original design of floating outside the top of the upper layer of the command tower was changed to vertical downward. In Xu Jun's opinion, the original upper layer was covered under the top cover of the command tower, so there was no need for such floating outside.

The two double electric 20mm machine turrets in front and rear were retained. Although Xu Jun did not think this thing could play a big role, it was better than nothing. It should be fine to scare low-altitude targets. Using it to shoot some surface targets can also have a good sound and light effect. More importantly, it can slightly increase the sense of security of the crew so that they will not feel naked. Therefore, Xu Jun finally decided to retain these two anti-aircraft turrets that have almost become xxi characteristics, and also consider creating newer replacement products in the future to increase the air-to-air firepower of this submarine.

The u1001 has only three external hatches on and off the entire boat. This submarine is different from the previous models and has one less tail torpedo loading hatch than ordinary conventional submarines. Because this submarine does not have tail torpedo launch equipment, of course there is no burden on tail torpedo cabin.

All weapons of submarines are installed on the bow of the submarine, and generally only small offshore submarines do this. The configuration of the u1001 giant shark with more than 2,000 tons seems a bit special. In fact, this is also a valuable experience obtained by the German Navy's long-term use of submarines. Although the tail torpedo increases the means of submarine attack, it also consumes valuable tonnage. Most of the time, the submarine faces the enemy head-on, and there are not many opportunities to use the tail torpedo. Turning the bow to attack is both troublesome and dangerous. Many submarine captains will avoid using the tail torpedo, but instead treat it as the last guarantee.

The xxi type uses technology beyond the times. The new hydraulic auxiliary loading equipment gives her the ability to quickly reinstall torpedoes in combat. This improvement cooperates with the excellent maneuverability and concealment of the submarine. Xxi will always take the initiative in the battlefield, rather than being chased by enemy ships as usual. Therefore, the cancellation of the tail torpedo launcher will not reduce her combat capability, and the saved tonnage and space can be used to install more advanced equipment.

In addition to the torpedo loading port at the bow, the xxi submarine has only two personnel hatches, one of which is directly connected to the captain's command tower and the command center cabin at the top of the command tower platform. The other hatch is inside the command tower enclosure, and enters the command tower through a side door on the command tower shell, and then enters the submarine through the entrance hatch on the deck.

If you want to use the hatch in front, Xu Jun must step on the pedals on the command tower shell. Climb up the command tower more than four meters high and flip into the fence to reach the lookout deck where the hatch is. Although Xu Jun didn't mind doing this, no one present would allow him to take risks like this.

So a group of people could only enter the submarine from the second hatch. Not only Germany, but all submarines of all countries would leave a hatch at this position. Xu Jun insisted on asking him to be the first to enter the submarine, and everyone could only obey obediently on this issue. The head of state put his cane under his armpit and slowly climbed down the straight iron ladder.

When the shiny riding boots stepped on the floor with a rubber non-slip pad, Xu Jun turned his head and looked around. When he looked up, he saw a chef holding a spoon standing in front of the electric stove in amazement.

"Hi, Reinhart!" The chef stood attentively and saluted, and the spoon in his hand hit the smoked pig's trotter hanging at the bottom of the closet. The pickled product weighing two kilograms was shaking there.

"Hi... Forget it, you can continue to work." Xu Jun raised his scepter and knocked his hat brim, then turned his head and looked towards the top of the ladder.
Chapter completed!