2776: C2776 There Are so Many Requirements

C2776 There Are so Many Requirements

To Qin Guan, since he had to do it, he had to do it the best he could. In any case, even if he didn't ask for it, the Ruby Design Bureau would still improve it.0

Although they were both called Kilo-class submarines, there was a huge gap in their performance. In the early days, they were called Type 877. Later on, they were called Type 636, and their appearance didn't seem to have changed much. It was just that their drainage was slightly enlarged. However, its combat ability was already as different as heaven and earth.

Now, since Han Country wanted to order, then they might as well buy the most advanced submarine. Furthermore, if they wanted to improve it, then it would be the submarine designers of Han Country who designed it together with them. After all, many of the equipment inside would definitely be replaced by the equipment of the Han Country itself. This way, it would allow the submarine's combat strength to improve further.

The first thing to be remodeled was the propeller.

For a submarine, the noise produced by the propeller was the loudest. In the past, the submarine used a three-leaf propeller. The propellers rotated at a high speed and made a lot of noise. Later, the blades of the propellers began to increase. Five leaves, seven leaves, the number of leaves increased, and at the same time, the diameter of the leaves began to increase. This way, when the spinning speed was lowered... Obtaining sufficient thrust, the speed of rotation became lower and lower... Naturally, the noise would also be smaller.

"I need to use an even better design of a seven-leaf propeller, or even a nine-leaf large slanted propeller. The spin speed will be lowered to 250 revolutions per minute. This way, there will be a better performance of low noise." Qin Guan said.

Spesky frowned when he heard this. Do you think it's that simple to say something? To build a new propeller, complicated programming and complex calculations must be done. Do you think it's as simple as moving your mouth?

"If you can't do it, you can leave the propeller at the tail. We can process and install it in the country." Qin Guan continued.

For a submarine, the propeller was one of the most confidential parts. It could be seen, even when it was being transported by the dock. The propeller would be tightly wrapped, afraid that the outside world would know the shape of the propeller. Thus, the sound and characteristics of the propellers could be deduced.

Since this submarine was ordered by Han Country, then Han Country would have to join in. In any case, Han Country was definitely the most advanced in this aspect. There were countless plans to achieve better performance. As long as the parameters of the transmission shaft were matched well, when the propellers came back, they could install them on their own.

"In terms of battery storage, the battery you produced only has two years of life. This is absolutely not possible. In our country, there are better battery storage companies... The batteries produced can be used for at least five years of life. If you don't have the same batteries, then we need our own batteries." Qin Guan continued.

When the submarine sailed underwater, the batteries were the main driving force. It was no different from an old scooter or an electric bicycle. It was the most ordinary lead acid battery, with good performance in the first two years. After that, it began to shrink drastically. Originally, it was 100 kilometers long to be charged with electricity. But in the end, it couldn't even run 50 kilometers. For electric vehicles, at most, it would just charge a few more times. For submarines, that would be bitter. Increase the number of charging up. That would increase the risk. So, as long as the endurance was reduced to a certain amount... I need to change to a new battery.

The ones produced in Bear Country only had a lifespan of about two years. After that, he had to change to a new one that was produced by his own side. It could be used for at least five years. So, if the other side doesn't have a similar product... Then he would have to use his own. Only then would he be able to achieve excellent performance. Qin Guan was definitely perfecting himself. Even with the AIP system, he could not relax in terms of battery storage.

In the submarine, the most ancient lead acid battery had always been used. The lithium battery, which could increase energy density by a large margin, had never been used before. This was because the lithium battery was too dangerous. Those small batteries were linked together. It was already very dangerous to make a car. Not to mention the battery used in the submarine, which was equivalent to dozens of cars... It was more complicated, and its performance was not good under low temperatures. After the submarine dived into the water, the temperature wouldn't be too high.

Spesky's brows furrowed more and more. He originally wanted to trick the Han people. Who would have thought that they would know the parameters of their own submarine. They were so clear that they even knew the lifespan of the battery! They were not as easy to fool as White Elephant People!

"We also have a battery with a lifespan of five years. We can totally give it to you to use." Spesky said.

"That's the best. But when we have to sign the agreement... It is clearly stated that if the submarine's battery life is less than five years, then you will be responsible for changing it for free, and we will leave behind the final payment, we'll make up for it in five years. " Qin Guan said.

Qin Guan's words shocked Spesky even more. Their conditions were really harsh. In the past, when Bear Country sold military equipment to the outside world, it was not their turn to be picky and deduct the final payment.

This was a market. It was not the same era as before. Qin Guan secretly thought in his heart. In fact, in any project, it's normal to leave a portion of the final payment. You promised five years of life, but you wouldn't be able to reach it in those five years. What should I do?

With your reputation? If I have this reputation, I can only depend on my luck. It's just like some electric car companies that promise to protect the electric core for life. But the electric core was not a battery. What if the battery's control circuit was broken? Moreover, even if the electric core was broken, when the other party tested it, it was man-made to say that when you charged, the charge would not be broken. What could you do?

Only by leaving behind the final payment can you have the confidence. If you don't repair it for me, then I won't give you the final payment. It's that simple.

"Its soundproofing system needs to be more precise and ensure that it has lower underwater noise. We also hope that you can use the latest silencer."

Over the years of development in Bear Country, submarine technology had made great progress. This included silencer tiles. They had developed many types of silencer tiles. They stuck to the surface of the submarine and greatly reduced the noise. Of course, in the long journey, the silencer tiles would sometimes fall off. Therefore, some of the submarines in Bear Country would look mottled. It felt like the vicissitudes of time.

"Some of the equipment inside, we hope to know the specific indicators. If it's not advanced enough, we also hope to use the same kind of equipment to replace it. Especially the most important sonar system inside. " Qin Guan continued.

Spesky almost slammed the table and stood up. We are not going to do your business anymore! It's just four submarines. Why do you have so much nonsense to say? This is simply tailor-made for you. It's just the workload at the Design Bureau. That is quite a large amount, not to mention that the factory needs to learn new crafts.

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