One Planet for Everyone! Building Science and Technology Civilization at the Beginning

Today was the first sea trial, and Zhou Lei also came over, and the shipyard's slipway was flooded. The first thing to do is a static test to see if there are any leaks in the hull.

"Slipway, please report the situation." The big screen in the main control room displays the status of the Dolphin's internal sensors. If there is any water leakage or pressure problem, it will be displayed on it.

"The seawater has reached the no-load waterline." At this time, there is no seawater between the inner and outer hulls of the Dolphin, so this line is its floating line.

"The master control received it, and opened the water inlet valve remotely."

The sea water is slowly rising, and the Dolphin is also pumping water in. Slowly, the sea water overflowed the uppermost layer of the Dolphin. Because it is an unmanned submarine, there is no watchtower design, which looks like a torpedo from a distance.

"Slipway, please confirm that the Dolphin has completely entered the water."

"The berth has confirmed that the Dolphin has entered the water."

"Attention all units, check the sensor status."

Several operators in front of the big screen turned on the icons of the sensors, which were displayed on the screen with green lights.

"Report, master controller, everything is normal."

"Mr. Zhou, should we start the next test?"

"let's start."

"Please pay attention to the berth, the second test of the sea trial has begun. Open the sea door."

"The slipway understands that the Tonghai Gate has been powered on and is expected to open in three minutes."

The Tonghai Gate is a large iron gate leading from the slipway to the sea. It needs to be driven by a motor to open the gear box slowly.

"Console, throw out the antenna."

Because in the sea, radio signals are very weak, so usually submarines either use long-wave communication, or throw antennas like this.

The communication efficiency of long-wave communication is very, very low, and the antenna on land is calculated by several kilometers, so most submarines communicate with the outside world using towed antennas.

An arm-thin antenna tube is thrown out from the small hole on the back of the housing. There are more than 100 meters of tow wire inside the antenna tube, which will provide enough buoyancy to ensure normal communication.

"Start the propellers."

The three-bladed propeller slowly started to rotate, "propeller acceleration and deceleration test."

Under the remote command, the propeller started to rotate suddenly and slowly.

"The console reports that the propellers are fine."

"Prepare to leave the port." The following is the normal sea trial test.

"Please pay attention to the berth, the Dolphin will leave the port soon. Please pay attention to the console, loosen the berth and fix it."

There was a burst of bubbles in the sea water, and several huge mechanical clips that fixed the Dolphin loosened.

The Dolphin wobbled up a bit, then stabilized.

"There seems to be no problem." Zhou Lei asked the project manager.

"Yes, Mr. Zhou, we have added a balance blade at the rear, so there is no problem of tilting and rolling found in the previous test."

"You're looking more and more like a torpedo now. Hope it doesn't scare anyone."

"The design of the submarine is only a few shapes, and they are already mature designs. But this kind of unmanned one is still rare."

"lets go."

The operator sat in front of the control console with joystick and chart, and he carefully controlled the dolphin out of the range of the berth.

Then I clicked a few coordinate points on the sea chart and created a hexagonal route map.

The red light on the console flickered for a while, and after a few seconds, the Dolphin received the signal. It automatically adjusted to a depth of five meters underwater, then partially retracted the towed antenna, and the propellers began to accelerate.

"Look, it's already started." Many people gathered around the window above the slipway and looked at the sea.

Because of the antenna, there is a white line on the sea.

Zhou Lei also took out a single-aperture telescope and set it up at the window to look outside.

"The first waypoint has been reached," the operator sees from the control screen that a red dot has passed the waypoint.

At this time, a coast guard ship appeared from a distance, "No, don't be regarded as a torpedo by them."

Zhou Lei came back to his senses, and quickly asked the project manager, "Have you notified the Maritime Safety Administration for today's sea trial?"

Everyone shook their heads, "No."

"Is there anyone who can speak lights?"

"Yes, there are still lights in the warehouse."

"Why are you still standing there, hurry up and get it." Zhou Lei stamped his feet anxiously.

There was a flurry of fuss, the ship's signal lights were set up, and the wires were dragged over.

"Quickly tell that whoever can make lights to come over quickly."

A young man came and stood by the lamp, looking at Zhou Lei with questioning eyes.

"Just say, our submersible sea trial."

The young man considered the words and codes for a while, and then pointed the light at the Coast Guard ship slowly approaching in the distance.

"We have received it." A few minutes later, a confirmation light message was sent from the Coast Guard ship.

"Boss, the coast guard said it has been received."

Zhou Lei breathed a sigh of relief, afraid that the coast guard would use the cannon to shoot the submarine a few times for fun.

At this time, the submarine passed the fourth navigation point, that is, a few hundred meters from the starboard side of the coast guard ship.

The captain of the coast guard ship had already seen the white track on the sea, "Sonar, did you detect the sound?"

"Report Captain, no."

"This submersible is fine, there is no sound so close."

"Play active sonar."

"yes!"

The sonar sounded in the waters near the Dolphin, and the sonar soldiers covered their earphones tightly, but there was still no special sound, only the background noise in the sea.

"Report to the captain, there is no audio feedback."

"This is amazing, dock the boat on their pier. Let's go and see."

"yes!"

The Dolphin sailed back smoothly, and when it was a few hundred meters away from the berth, it emptied the sea water and floated up.

At this time, the captain saw the whole picture of the Dolphin through the telescope.

"It's so small, it's still a submarine, MLGD, who designed the shape, isn't this a torpedo?"

Half an hour later, the coast guard ship docked at the dock of the shipyard.

Zhou Lei had already seen the coast guard ship coming, so he called Mr. Chen first and asked him to ventilate the navy to avoid any trouble.

A dozen soldiers and seven or eight officers got off the coast guard ship.

Zhou Lei went up to meet him and said, "Welcome."

The captain waved his hand, "Take us to see your submarine."

"This way please."

At this time, the Dolphin stopped back to the berth, then closed the sea door, and started several high-power pumps to start draining water.

While waiting for the drainage, the sound of helicopters sounded in the sky, it was too loud. Everyone didn't pay attention at first, because there is a sea rescue airport nearby, and some helicopters often fly overhead.

But this one fell straight down and stopped in an open space in the shipyard.

Zhou Lei squinted his eyes, judging from his figure, Mr. Chen should have come over in person.

Zhou Lei walked a few steps to greet him: "Thank you, why did you come here in person?"

Mr. Chen smiled and said, "I'm afraid you'll cause trouble. The coast guard ship you're talking about is No. 311?"

"Yes, that's right, their captain is gray-haired."

"That's okay, I know him."

At this moment, the captain also came over. He punched Mr. Chen and said with a smile, "I haven't seen you for a long time."

"I didn't expect that I'm in the urban area every day, and you won't come to see me when you arrive in Hong Kong."

"It's not that the training is too busy, don't leave today, I just picked up a big fish from the sea."

"Where did it come from?"

"The waves were relatively strong in the early morning, and a salmon flew up from the sea. It is estimated that the lights of the warship were regarded as the sun."

"Okay, just give me a little bit."

"Report to the captain, the water has drained." A soldier came over and stood at attention to salute, and then reported.

"Let's go and see the submarine that can escape the active sonar."

A group of people went down to the still wet berth, and there were some small fish and shrimps that ran in just now in the place where there was a puddle, and a few crabs were still looking for the exit.

The captain saw at a glance that the hull was dark black, not dripping with water, and the surface was abnormally smooth. He touched it with his hand and found that there was almost zero friction.

"What material are you using on the surface?"

"Polymer coating." Zhou Lei took a peek at Mr. Chen, thinking, I just didn't inform you, I didn't mean not to tell you, I have found a way to paint the polymer material.

Mr. Chen really understood, he stared at Zhou Lei.

"How about the coefficient of friction?" the captain asked curiously.

"0.004, an order of magnitude lower than Teflon."

The captain wanted to continue asking some questions, but at this time Mr. Chen stopped him, lost his eyes, and said, "Captain Qian, I will explain later."

The captain probably guessed that there might be other properties of this material that should be kept secret, so he asked.

He analyzed the torpedo submarine with a professional eye, trying to find a topic to talk about.

Seeing the densely packed holes on the hull, he asked, "What's inside?"

Because it was the first sea trial, no life support was placed inside.

Zhou Lei replied: "It's life-support equipment for rescue."

"Rely on your submarine?"

"Captain Qian, the main reason is that if you use a small boat to transport it, it is easy to have problems in the wind and waves, so we want to use the submarine to pass directly under the sea surface."

"Your idea is also reasonable."

At a place tens of meters below sea level, it is basically calm.

"Can I have a look at your life support device? Did you name it?" Captain Qian asked with a look of disgust. What a broken name, I hope it can be worthy of this name in terms of function.

Next to an indoor swimming pool, a large number of life supporters are placed on a table, some engineers are making adjustments, and some are doing trial run tests.

In the pool, there are four life support devices that can swim flexibly. In the middle of the pool, the hull of a deliberately capsized wreck can be seen underwater.

Zhou Lei said: "We have set up several places for people to hide in the hull, and there will still be some air in these places after being reversed.

At this time, the life support needs to automatically find those places, provide oxygen and power for the people inside. "

"You mean this one is self-guided?" Captain Qian looked disbelieving.

Mr. Chen said: "Old Qian, this

It is their company's strongest technology. Didn't you just buy a robot dog for your father-in-law a few days ago? "

"Is it theirs?"

Mr. Chen nodded: "That's right, let's believe it now."