"Shh..."

Xu Xingchen made a gesture of silence:

"Be quieter, don't make a noise until 517. Everyone comes out with me. Please help Sister Yingtan guard 517..."

Xu Xingchen took a group of little guys to leave the renovated lounge and came to the hall of the construction center to explain to the enthusiastic little guys:

"This is the first time this transformation. The results and effects of the transformation are still full of uncertainty. What I am talking about is not the question of success or failure of the transformation, but whether I can adapt after the transformation. After all, this has changed from a warship girl to a tank girl, and the way of walking and moving has completely changed...

"So, we have to wait for the 517 transformation to complete, and after doing basic tests, we can confirm that we can adapt to this transformation method, and then we will make a transformation for everyone. At that time, we don't need to come to me, and I will take the initiative to make a transformation for everyone.

"And now this is just the first attempt, and it has been changed to the relatively stable tank. There will be an attempt from aircraft or spacecraft. Do you want to fly?"

The little ship girls are all very sensible. After Xu Xingchen explained the reasons seriously, he nodded obediently and agreed without rushing to make a transformation immediately.

Xu Xingchen's last words made almost half of the little ship girls stunned for a moment, and then burst into warm cheers:

"Fly, I want to fly!"

"I want to change it to an airplane, I won't make a boat anymore!"

"The tank is not as good as the plane!"

Xu Xingchen smiled and nodded in agreement, saying to the girls who shouted the loudest:

"Okay, okay, if I do the aircraft transformation test tomorrow or the day after tomorrow, I will choose one of you..."

Xu Xingchen and a group of small ship girls chatted and played for about an hour, and the transformation of 517 was finally over.

Yingtan, who was guarding the room, saw the little guy open his eyes and immediately notified Chaoge who was following Xu Xingchen, and Chaoge notified Xu Xingchen.

Xu Xingchen immediately took the little ship girls and ran into the lounge together.

As soon as everyone entered the door, they saw a girl aged 17 or 18 and very good-looking. She was wearing a dark green military uniform and carefully got out of bed with the support of Yingtan.

Xu Xingchen knew that this was the 517 that was transformed. If the ship's armor was opened...armored, those equipment similar to armor would appear.

"commander!"

Seeing Xu Xingchen come in, 517 immediately subconsciously wanted to jump up and run over to say hello, but as a result, he rushed forward as soon as he stepped forward.

"careful!"

Xu Xingchen screamed in shock and rushed forward quickly, trying to support her, but it was obviously too late to get off the distance.

Fortunately, Senior Yingtan is stable enough. He was holding her arm next to him. At this time, he grabbed her with force and reached out to block her waist. 517 did not fall directly on the ground.

Then there was some helpless reminder and criticism:

"I just sat up and I had to sit up, but now I forgot it? Don't think about running away now. Let's stand up slowly first, stand firm first, and then walk slowly step by step..."

Xu Xingchen finally followed, grabbed 517's other arm, and asked with some concern and concern:

"Don't worry, get used to the state first..."

The 517 chosen by Xu Xingchen was originally a relatively stable little ship girl. Now that she has not changed much after she grows up, her thinking has become more mature.

The reaction just now was only completed. When I saw Xu Xingchen excited, I subconsciously ran forward.

After being supported by the senior Yingtan, he immediately recovered and realized his own changes again. He did not dare to do any impulsive and reckless things anymore.

Moreover, after the body turned from a little baby to a big girl, 517's mind became more mature, and his thinking and expression ability were significantly enhanced.

517 still remember that Xu Xingchen made a transformation for himself, and then did another test. He wanted to see the effect of the transformation, so he took the initiative to report his situation:

"Commander, I feel...it's very confusing now, mainly because the center of gravity of the body and the hull have changed.

"Especially the center of gravity of the hull, the floating center has completely changed, the structural linear shape has also changed, the vertical and horizontal rolling angle has certainly changed...

"Originally... we didn't have to consider these. The shape of the hull is fixed. As long as the design is correct and the straightening is automatic, we will get used to it.

"But now... I feel that I am unstable now. Now when I get into the water, I will probably capsize and sink to the bottom..."

Xu Xingchen was of course a little confused and curious about 517, so he listened very seriously and thought about it.

The stable design of a ship is a very complex science. Xu Xingchen himself lets the system automatically generate the optimal hull and cannot complete the design by himself. He just saw it a lot during the transformation and has also learned it specifically, so he knows the basic principles.

The two centers of the ship, the center of gravity of the hull mass - the center of gravity, and the center of buoyancy - the center of floating force.

For modern large ships, the center of gravity is usually above the floating center, usually above the water surface, and the floating center is the center of the underwater part.

It’s like putting a basin in water, putting a wooden board on the basin, and pressing a few bricks on the formwork.

The center of gravity of the overall structure must be on the water, inside the pile of bricks, and the center of buoyancy must be underwater, at a certain point in the basin.

The center of gravity of the ship is basically unchanged. After the fuel and items loaded are consumed, the hull becomes lighter. Most of them are usually filled with a water pressure chamber to maintain the original center of gravity, otherwise it will be unstable.

However, Russian warships usually do not hold the bay. If they are unstable, they are unstable. If they are not overturned, they will run faster if they are light...

The floating heart of a ship changes at any time as the hull shakes, because the floating heart is the center point of buoyancy.

The hull is tilted to the right, and the left part of the hull, which is located in the water, becomes smaller.

Because buoyancy is equal to the gravity of the water discharged by the object, the buoyancy received on the left also becomes smaller.

On the right side, it is completely opposite. As more water is discharged, the buoyancy force is also increased.

When the hull tilts to the right, the buoyancy on the right will increase, which is equivalent to the downward pressure of the spring. Unless the load-bearing capacity of the spring is exceeded, the pressing force is equal to the elastic force.

So before turning completely over, the inclined hull will be automatically straightened.

Think about putting a thicker wooden stick into the water and pressing hard on one end of the stick. As the depth of the wooden stick enters the water, you can feel that the buoyancy becomes greater and greater.

Unless you press the stick completely into the water to reach the point of making the stick stand up, as long as you release your hand, the head you pressed will float up immediately.

According to the principle of leverage, the wider the hull, the greater the force of the straightening, and the more stable the hull, so traditional large battleships are all chubby.

In this case, why not design the boat in a round or square shape, it is obviously the most stable.

Because we cannot only consider stability, but also consider the resistance encountered during navigation and the direction of the water flow under navigation.

Normally, the hull is long-shaped. When the hull is sailing, the main gun in front of the hull fires to the left, and the recoil of the main gun will definitely cause the bow to shift to the right.

Once the hull shifts to the right, the force-bearing surface on the left side of the hull will increase, and the impact force of the water flow will also increase, thus forming a force to straighten the hull to the left.

vice versa.

The Russians once made a bold attempt and designed a very strange prototype warship, Novgorod-class.

Not only is the navigation resistance very high, the speed is only 7 knots, but two guns are installed, and they are not at the center of the disc, so they often turn around in the spot when firing.

And it is difficult to stop when turning, because she is a round plate, so no matter how she turns around, the left and right stress surfaces will not change...

However, just as this thought began, the 517 passage was still halfway through, and Xu Xingchen suddenly understood:
Chapter completed!