There is no doubt that all the components can be reproduced.

Wang Bu'an decided to use tertiary carbide manufacturing to improve the quality of the gearbox.

With the hardness of secondary cemented carbide, it can withstand 1500 horsepower. However, it is still a bit difficult to fully withstand the high torque of 3000 horsepower.

If tertiary carbide is used, then there is no problem.

The same goes for the drive spindle. Tertiary cemented carbide is also used.

A little more troublesome is the propeller.

Its processing requires the use of 100 million tons of hydraulic presses.

In fact, for an ordinary fishing boat propeller, a hydraulic press of two hundred thousand tons is enough.

If there is a 200,000-ton hydraulic press or CNC machine tool in the new Hongyang shipyard, all the parts and components can be solved in the shipyard.

Of course, it refers to those parts that are common in the country, have standard specifications, and do not have patent rights.

There are good and bad parts like this.

The advantage is that the data is open and used in a large area, and there is no need to worry about infringement.

The downside is that the performance is not advanced enough.

Those advanced propellers are protected by many patents.

Just a small propeller has thousands, tens of thousands of patents.

The 65-meter squid fishing boat uses a universal propeller with a diameter of 204 cm, a design speed of only 11.64 knots, aluminum bronze material, four blades, right-hand rotation, pitch ratio of 0.79, diameter ratio of 0.163, and a total weight of 718 kg. The efficiency of the screw machine is 0.661, the moment of inertia is 1389, and the trim angle is 10 degrees.

According to the data, this propeller was designed more than ten years ago. There have been no major changes since then.

Obviously, today, it is definitely backward and cannot keep up with the times.

However, its biggest advantage is that it is universal! The specifications and parameters are standard, and there are many spare parts. Easy to repair. The price is cheap.

What fishing boats need is good quality at a low price.

Any other advancements can be ignored for the time being.

"If you want to double the thrust, how should you modify it?" Wang Bu'an deliberately tested Mihara Takeshi. Who calls the other person a technician?

"The diameter increased by 2 meters, and the rotational speed increased to more than 1750. Takeshi Yonehara opened his mouth and came.

"Aren't you afraid of broken blades?"

"You only asked how to double the thrust, and you didn't say that you want to ensure that the blades don't break!"

"What if you want to make sure the blades don't break?"

"If I understand, do I still need to work here?"

"That's right. ”

Wang Buan nodded noncommittally.

Takeshi Yonehara's method is, of course, simple and crude. It's almost infeasible.

Why almost?

Because of the need for sufficiently strong raw materials and manufacturing processes.

Otherwise, the propeller blades will break in minutes.

The propeller with a diameter of only 2 meters was forcibly raised to 4 meters, how much more does the water resistance have to increase?

Originally, there was only a speed of more than 1100, but if you raise it to more than 1750, the blades of the propeller will definitely not be able to withstand it! You know, the propeller of a fishing boat basically has a very low rotational speed.

Seawater is not air. Its resistance is very large. Small blades need to withstand very harsh tests.

Seawater is also much more corrosive than air. Higher requirements are placed on the quality of the propellers.

A few small bubbles can knock the propeller into a thousand holes, and finally have to be eliminated and replaced.

The propeller with a diameter of 4 meters will catch up with a 5,000-ton ship.

It must be known that the world's largest diameter propeller is only 11.2 meters. It was used to propel the 400,000-ton mega ship.

This super-large propeller weighs more than 130 tons on its own.

It's just the weight of the propeller itself. It does not include any other accessories.

In addition, the hub of the propeller is also unable to withstand such drastic changes, and it is estimated that it will break when it starts.

There is also the question of bearings......

How does the propeller turn? Of course, it depends on the bearings!

What kind of bearing can withstand such a strong force?

There is also a drive spindle......

What kind of high temperature and high pressure does it have to withstand in order to transmit such perverted power?

Conservative estimates put the torque at least above 4000 tons.

It is even possible to exceed 5000 tons.

Is it possible to achieve such a simple, such a crude transformation?

Of course!

That's super raw material!

Superior manufacturing process attached.

Tertiary cemented carbide is utilized. Utilize 100 million tons of hydraulic presses.

"If the blades don't break, and the speed can reach more than 1,750 rpm, how fast can it be?" Wang Bu'an continued.

Verse 22. Takeshi Yonehara said affirmatively, "Are you going to test me?"

"Yes. Wang Buan was blunt.

"With a maximum output of 1,500 hp, the speed is definitely over 22 knots. ”

"What if the maximum output is 3,000 horsepower?

"Theoretically, it can reach more than 35 knots. But considering the strength of the marine steel plates, as well as the influence of wind and waves, I recommend controlling it below 28 knots. ”

"Why?"

"The dead weight of the fishing boat is too small. There is not enough draft. Easy to get out of control. ”

"What if you add a bulbous bow?"

"It's going to be a new design, a new manufacturing. ”

"Do you have manufacturing experience?"

"The drawings are all designed by the 708 Research Institute and are used throughout the country. You don't have to design it yourself. ”

Takeshi Yonehara is like a few treasures.

He mainly recommends the 73-meter pelagic squid fishing boat.

The length of this type of ship is 72.78 meters, the length between the perpendiculars is 63 meters, the width is 10.8 meters, the depth is 6.7 meters, the design draft is 3.95 meters, and the structural draft is 4 meters.

Full load displacement 896 tons, maximum displacement 932 tons. The design speed is 13 knots, and the design range is 10,000 kilometers. Unlimited Navigation Zone.

The volume of fuel tanks is 420 cubic meters, the volume of ballast tanks is 110 cubic meters, and the volume of clear water tanks is 40 cubic meters.

It is equipped with a 1,152 kW diesel engine as standard. The maximum power is 1334KW.

"Why don't you make a 65-meter squid fishing boat?" asked Wang Buan, intentionally or unintentionally.

"It's not that I don't do it. As long as you have an order. We can do that too. Yonehara said, "But the 73-meter squid fishing boat is more cost-effective." ”

"Why?"

"Because, for a 65-meter squid fishing boat, there are only 25 squid fishing machines. However, there are 29 squid fishing boats of 73 meters. It is also equipped with a crane capable of lifting 1.2 tons of heavy loads......"

Takeshi Yonehara is indeed familiar with shipbuilding data.

After all, these ships, they used to make them often.

Because it is a popular ship, there is no considerable profit, only to work on the details and save costs as much as possible.

For example, a steel double deck with 10 mm steel on one floor and 20 mm steel on one layer.

Wang Buan doesn't pay attention to any of this.

He doesn't really care about the cost.

He cares about performance.

How do you get the most out of your squid fishing boat?

"I'll give you a task. Wang Bu'an said, "You can discuss with everyone and see how to transform the squid fishing boat to maximize its performance." ”

"What do you mean?"

"For example, shrinking the fuel tanks and expanding the ballast tanks and clean water tanks. Increase electromechanical equipment. Increased squid fishing machine. ”

Wang Bu'an called the old monster over and asked him to have a good talk with Takeshi Mihara.

All the transformation costs are borne by Wang Bu'an.

In other words, the old youkai can get a brand new 65-meter squid fishing boat for the price of 150 rocks, as well as all the new equipment.

"Boss Wang, you can't fool me, right?" the old monster felt incredulous.

"What am I lying to you for?" Wang Buan said indifferently, "How much money can you have?"

"Hey, hey. The old monster was immediately relieved.

That's true.

Others have a lot of money, will they care about your millions?

Eight Panshi 150 diesel engines, half sold and half sent, the total price is 3.84 million, less than four million. Will others be eye-catching?

More often than not, Wang Buan is engaged in experiments.

"Then I'll transform the 65-meter fishing boat first. "Takeshi Yonehara is also energetic.

Repeating the same thing all day is really boring.

If there is a slight change, then the freshness will come up.

The 65-meter squid fishing boat is not completely without the possibility of modification. For example, it is still possible to add one or two air conditioners.

You only need to reconnect the line, and you can properly install the air conditioner.

Spare batteries will also be removed. Replace with a tertiary hydrogen storage alloy.

That small piece can reserve 5,000 kilowatt-hours of electricity. It feels a little incredible.

The transformation of the clean water tank is more difficult.

Unless there is a seawater purifier.

"That's right, to produce seawater purifiers. Wang Buan recorded the incident.

If there is one thing that is most uncomfortable for seafarers on board, it is probably that there is not enough fresh water to use. Clean fresh water can only be used for drinking, or cooking. Don't expect anything else.

What the?

Bathe?

Don't even think about it.

Unless you're willing to jump into the ocean.

The reason for all this is the lack of a cheap seawater purifier with a large production capacity, which cannot produce fresh water in large quantities.

Seawater desalination technology has been developing at a rapid pace. In recent years, the cost of desalination per ton of seawater has been reduced to 4-5 yuan. It's almost the same price as tap water.

China's first desalination laboratory is in Yucheng. The desalination technology in West Lake Province is still relatively advanced.

The problem now is that it is difficult to miniaturize and produce high volumes of desalination equipment.

It is not easy to achieve desalination on smaller fishing vessels. Output is not enough to meet demand.

Calculated according to the standard staffing of 30 crew members. About 15 tons of fresh water are needed per day.

How do these 15 tons of fresh water come from, and how much does it cost?

If the cost exceeds 5 yuan per ton, you must think twice.

However, in small desalination equipment, the cost is very high. It is often more than 10 yuan per ton.

What to do?

Wang Buan has a way.