Chapter 144: Is the speed not up to standard? Where is the pit?

"Xiao Ling, you have lost weight. You are really wearing more clothes and never regret it. You are so haggard for me!" Qin Tao said to Zhao Ling after seeing her.

 “Screw you, we are all busy with work, who would care about you? Stop being so sentimental.”

"Really? Then I'm really disappointed. You don't miss me at all, but I miss you every day."

“No, I miss you a little.”

“That’s pretty much it, come on, let’s have a pop first!”

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　what is this? Zhao Ling really had never heard of it, and then she felt a burst of moisture on her lips. With a pop, she finally understood.

“Hey, be careful of being seen.” Zhao Ling blushed and looked around.

 It is afternoon now, everyone is working, the road here is empty, there is no one.

“How is the situation on Chongming Island? Is it going well?”

“Well, there is no problem there for the time being.” Qin Tao said.

 “Then what did you come back for?”

 “I miss you.”

Even though she knew Qin Tao was joking, Zhao Ling still felt very sweet in her heart.

“The second missile boat has been launched, and the sea trial is going smoothly.” Zhao Ling said: “Aren’t you anxious about the subsequent orders?”

Qin Tao smiled: "One trick can be used everywhere. Only our factory can build this kind of missile boat. No other factory can take on this hot potato."

 “You are quite confident.”

 The two of them continued walking forward.

"Xiao Ling, if the navy doesn't give us follow-up orders, will you, the military representative, have to leave?"

"Um."

“How about we take advantage of this free time to go to the capital together and I will formally propose marriage to your family?”

“Huh? Well, well, well!” Zhao Ling nodded repeatedly. This was what she was looking forward to the most.

Although Qin Tao kept talking about him and didn't explain the real purpose of his return at all, Zhao Ling didn't care anymore. The two of them had already done that, and of course they had to get married quickly.

 Under the same blue sky, Zhongjiang Shipyard.

Three ship production lines including a 30,000-ton slipway, a 1,500-ton ramp, and a small boat show the strength of this shipyard. They are a backbone enterprise with an annual production capacity of 200,000 deadweight tons of ships, and are also a subsidiary of China Shipbuilding Industry Corporation , they are proud.

 Today, they also ushered in a new moment.

 A brand new missile boat, all construction work has been completed.

Looking at the large missile boat and the hulls on both sides, Ma Guoqiang was very excited. He said to the military representative Wang Gang on the side: "Representative Wang, this is the strength of our Zhongjiang Shipyard. We can completely build it within a month." , Complete the construction of the missile boat! Three times faster than the Mingzhou Shipyard!"

 It is normal for them to be fast, because in their warehouses, various radars, anti-ship missile launch tubes, etc. are ready. The weapon systems originally intended for the next few 037-class missile boats can be directly installed on the 022 missile boats.

“Yes, Zhongjiang Shipyard has been building missile boats for our navy. The navy is relatively confident about you. Now, let’s start sea trials!”

“Yes, the sea trial has begun! Let’s all see how fast this ship can run, it will create a miracle!” Ma Guoqiang said.

More than a dozen shipyard technicians and navy sailors stepped onto the ship and quickly started the motor. With a roar, the missile boat began to slowly leave the dock.

 The four water jet thrusters were working at full power, constantly pushing the water flow, and the missile boat surged forward like an arrow off the string.

 Ten verses, twenty verses, thirty verses, forty verses!

 The missile boat continues to sprint, but it can be seen that the missile boat's acceleration has begun to decrease.

 Forty-one, forty-two, forty-three, when the missile boat reached a speed of forty-three knots, it could no longer accelerate.

The people observing on the pier were all experienced. Even if they couldn't see the speedometer, they knew that the speed of the missile boat at this time simply could not meet the design specifications.

 “What’s going on?” Ma Guoqiang’s expression suddenly changed: “Keep accelerating!”

 The missile boats of Mingzhou Shipyard can reach more than 50 knots! How come the missile boats from their Zhongjiang Shipyard can only reach more than 40 knots?

“The ship has reached its maximum speed and can no longer increase its speed. Moreover, it is still following the current.”

Ma Guoqiang's heart skipped a beat when he heard the news from the sea test personnel.

 Any ship has a maximum speed. The faster the ship, the greater the resistance of the water flow. Moreover, the relationship between speed and resistance is not directly proportional.

 At ten knots, the two have a primary relationship, at twenty knots, it is approximately a quadratic relationship, and above thirty knots, it is a cubic or even higher relationship.

 At the current speed, the resistance encountered by the ships is also huge, and all their power is used to overcome the resistance of the river water. Therefore, it is simply impossible to continue to speed up.

This still takes advantage of the downstream flow. If it were going against the current, the speed would probably not exceed forty knots!

how so?

Wang Gang, the military representative on the side, also changed his expression: "Speed ​​is the most important indicator of our missile boat. If the speed of this missile boat cannot meet the standard, then I will not sign. The Navy refuses to accept such a missile boat."

Cold sweat broke out on Ma Guoqiang's back. He quickly said: "Representative Wang, please rest assured that we will definitely hand over qualified missile boats to the troops. If the speed cannot be reached, we will solve it immediately." Research and solve it!”

 When the missile boat came back, everyone had serious faces. Ma Guoqiang immediately called a meeting with technical staff.

"It's definitely not a welding problem. We welded it exactly according to the design drawings without any changes." A technician said: "The lack of speed has nothing to do with us!"

“The power system is all imported, whether it is an engine or a waterjet, unless, unless…”

 “Unless what?”

“The engine power is not enough, or the waterjet propeller is the wrong model.”

“How is this possible? It’s clearly written on the drawing, and the reserved location is completely appropriate.”

“Call the Navy immediately for verification!” Ma Guoqiang said.

 A few minutes later, the caller came back.

“Yes, the model is exactly the same. It has been equipped with missile boats of the Navy. It uses two MTUV16396TE74L power diesel engines, each with an output of 6,800 horses, and four jet thrusters imported from the UK.”

"What's going on? With the same power and the same shape, why can our missile boat only run to forty knots? Tell me, what's going on?" Ma Guoqiang was anxious.

"I'm afraid we can only contact the design unit for this. If the speed cannot be reached, it is the design unit's fault." A technician said.

  If this problem occurs in other ships, then they can definitely blame the designers. After all, the failure to reach the speed was originally a design problem, but now, they cannot blame it.

"There must be nothing wrong with the design. The drawings are mine..." Ma Guoqiang swallowed a gulp of saliva: "We have to find the reason from ourselves. Everyone then thinks, what other problems are there that will cause the speed to be unable to be reached?"

“If it were a previous ship, we might be able to feel something based on experience, but now, this is the first time we build this catamaran. Who knows what the problem is.”

 “Yes, let’s find a designer to help!”

 Designers help? How could it be possible? The designer of this ship was Qin Tao. How could he come to solve their problem? Even if I come, I don’t know how much the consulting fee will be.

“You think, if we narrow the sheets on both sides, will it reduce the resistance of seawater?” said a technician.

Ma Guoqiang’s eyes immediately lit up.

If you look at the development of warships, you can see that early warships had a relatively large length-to-width ratio (simple understanding, the ratio of the length and width of a warship.) Such warships look relatively slender. The advantage is that they have low resistance and are easy to reach high altitudes. speed.

Early warships were all designed in this way. For example, the domestic Type 051 destroyer is 132 meters long and 12.8 meters wide. Divide the two to get 10.3. The American Perry-class frigates, Spruance-class destroyers, and Ticonde The length-to-width ratio of the Roga-class cruisers reaches more than 10.0.

However, this kind of slender hull has a small internal space, making it inconvenient to arrange more equipment. At the same time, it shakes violently in the waves, making the crew very uncomfortable. Therefore, in the later period, with the development of ship power, this value became It started to gradually decline.

  The aspect ratio of the domestically produced Type 056 frigate is approximately 7.4, that of the Type 054A frigate is approximately 8.4, and that of the Type 052D destroyer is approximately 8.3. The aspect ratio of the Burke-class destroyers and Zumwalt-class destroyers is set at around 7.6.

 Hence, later warships appeared to be relatively bloated, with fat hulls, less violent rocking from side to side, and at the same time, the space would become larger.

  If a warship cannot reach the speed, it is easiest to slim it down. Now for this catamaran, it is just a matter of reducing the width of both sides of the hull.

“No, the engine is placed inside the body, and the width is just right. If the width is reduced, the engine will not fit in.” Someone immediately rejected this plan.

No matter how much they discussed, they could not find a solution to the problem. A few hours passed, and Ma Guoqiang only felt helpless for a while. He frowned: "You continue to think of solutions, I will go to the Ship Design Institute to hire experts."

 The autumn wind blows and the leaves fall. It is already a refreshing autumn scene in the north.

When Santana entered the gray building, Zhao Ling in the co-pilot felt a little emotional.

“Brother Tao, it’s actually good for us to take the train.”

“Take the train? There are no sleepers, and the hard seats are too crowded. It’s not as convenient as driving a private car. Besides, I brought so many gifts.”

 “This is not a private car, it belongs to a shipyard.”

"What's the difference between the shipyard's and mine? Well, even if there is a difference now, there will soon be no difference in the future." Qin Tao said.

Zhao Ling glanced at Qin Tao curiously, not knowing what Qin Tao meant by this.

The car stopped at the entrance of the small courtyard. Qin Tao opened the trunk and took out the things inside. There was no shortage of tobacco, wine, sugar and tea. Of course, the more important thing was the wedding certificate and gift money.

Zhao Xiu'e did not go to work today and was resting at home. When she heard the noise outside, she rushed out and looked at Qin Tao with a smile: "Taozi, this engagement is just a formality. Why take so many things."

"This is what it should be. My father is busy dealing with many things at the shipyard, so he can't come over." Qin Tao said, "I will definitely bring my father and mother to visit the two elders before I get married."

“We now pay attention to new things and do new things, and we don’t pay so much attention to etiquette.”

“This is the gift money.” Qin Tao had already put the gift into the room, and then took out the red gift money bag.

 It’s bulging inside.

"This is it?" Zhao Xiu'e took it and opened it. She was immediately surprised: "There are so many, no, no!"

In the 1990s, a typical engagement fee of fifty or one hundred was quite a lot, but now, in this thick pile, there are seven or eight hundred-yuan bills for just four people!

"Here is eight hundred and eighty-eight yuan and eighty-eight cents, for good luck." Qin Tao said, "Nothing else, please accept it."

“Boy, don’t bring the social trap into your home. We are marrying our daughters, not selling them.” At this moment, Wu Shengli came back with his handbag.

Qin Tao looked at his watch. It's not even time to get off work yet, right? Is it appropriate for you to come back so early?

Facing Qin Tao's questioning gaze, Wu Shengli said: "Tell me, what good things have you done? Someone wrote a letter of report and the report came to the capital!"

“What?” Qin Tao was very curious: “Am I famous?”

“Humph, some people said that your factory pays bonuses at the end of the year, and you gave yourself 20,000 yuan. Is this true?” Wu Shengli said.

"have."

“Twenty thousand is enough to put you in jail for several years. Are you too bold?”

"I gave a bonus of 1,000 to ordinary workers, and another 1,000 bonus after working during the Chinese New Year. Ordinary workers can get 2,000, and I, the biggest contributor to the shipyard, can get 20,000. Why not?" Qin Tao said. .

Looking at Qin Tao's confident look, Wu Shengli shook his head: "When we do our work, we must be dedicated and don't ask for too much."

"Stop, stop." Qin Tao interrupted Wu Shengli: "In society, wealth is being created everywhere. You, the older generation, can talk about dedication. We young people, our efforts must be rewarded. Similar words, my family The old man talks a lot."

"Wait a minute, you are deceiving me like this, do you want me to work for the Navy for free? Tell you, no way! Just tell me how many good things I got for the Navy last time when I went to Lao Maozi's place? If the Navy doesn't give me three or five The order for ten missile boats, after that, don’t expect me to make a voluntary contribution, the navy will have to spend money to buy the good things I got from Lao Maozi!”

"Brother Tao, why are you talking to my dad?" Zhao Ling was a little anxious. Have you forgotten what you came for this time? Don't forget the important things!

“Oh, I’m sorry.” Qin Tao hesitated for a second.

"You, really, Tao Zi is here to propose marriage. What are you talking about?" Zhao Xiu'e also came out to smooth things over.

"It's not time to get off work yet. I came back to talk about business. Taozi, come with me to the study!"

 (End of this chapter)