Chapter 633: Bigger caliber

Boarding.
Set the destination.
take off.
Two hours later, I arrived at the destination smoothly.
The Little Golden Dragon helicopter landed slowly.
This is a remote seashore.
On the coast, five PLZ255 heavy guns are already lined up, with huge muzzles pointing to the sky.
The test firing personnel mobilized from the army are in their respective positions.
Wang Buan is looking forward to this test.
After all, its range is too far.
The impact point of the shell can only guarantee ten meters accuracy.
In other words, the maximum error may reach about ten meters.
If it is used to attack small targets, such accuracy is obviously not enough. The accuracy needs to be about one meter.
However, for ultra-long-range artillery, this accuracy is already very high.
After all, it fires shells, not precision guided missiles.
If it is an artillery-launched missile, the accuracy can of course continue to improve.
"Master Wang!" Tawu greeted him enthusiastically.
"Minister Tawu, hello." Wang Bu'an responded politely.
"Master Wang." Chai Lufeng greeted Wang Bu'an.
"Hello." Wang Bu'an nodded.
Inadvertently glanced around...
He unexpectedly saw a familiar but unfamiliar face in the crowd.
Sheng Huainan.
He actually appeared again.
It's really strange, this is a test fire of the PLZ255 heavy artillery, what does it have to do with him?
He studies nuclear submarines, so why not go busy with his own affairs?
It has been developed for so long, and there is no movement yet?
Is it another technical difficulty that is stuck?
Deserve it!
Deserves no one!
Deserve to be above the top!
Without the help of Tyrannosaurus Rex Industry, I see how you solve the problem.
"What? You and Sheng Huainan are a little unhappy?" Chai Lufeng was really clever, and he immediately felt Wang Bu'an's unhappy.
"There are some differences in technology." Wang Bu said calmly, "It's all trivial."
"It is said that his nuclear submarine project will be launched soon."
"What is the tonnage?"
"Forty-nine."
"Good guy."
Wang Bu'an secretly smacked his tongue.
This Sheng Huainan is really not a fuel-efficient lamp.
Sure enough, the largest tonnage plan was adopted. Up to 49,000 tons of displacement.
Looking at all the nuclear submarines in the world, this number can also be said to be ranked first. Even the typhoon level of the polar bear can't be compared.
What waves, what Ohio, what north wind goddess, there are scum in front of it!
"Is the power problem solved?" Wang Bu'an asked curiously.
"It seems to use two Rock 700 engines," Chai Lufeng said.
"is it?"
"Panshi 700..."
Wang Bu'an nodded to himself.
The single engine power of the Rock 700 combustible hydrogen engine is 100,000 KW, which is 136,000 horsepower.
If two are installed, they can indeed drive 49,000-ton nuclear submarines. Even compared with the nuclear power of the Ford aircraft carrier, it is not inferior. Even more energy saving.
Nuclear power also needs nuclear fuel. Maintenance costs are also high. But the combustible hydrogen engine saves everything.
From this perspective, the power system is no problem.
The most important thing is the shell material.
Is it to take pure titanium alloy?
However, the price of titanium alloy is very expensive.
A 49,000-ton pure titanium nuclear submarine requires approximately 30,000 tons of titanium alloy.
Calculated at 60,000 yuan per ton of titanium alloy, the cost of the shell material alone would require 1.8 billion yuan.
The price is still relatively high. It will push the price of the entire submarine to more than 10 billion yuan. After all, other raw materials or equipment are not cheap.
Ten billion yuan!
Just a nuclear submarine!
I am afraid that the superiors may not approve it. Too much over budget.
In addition, the processing technology of titanium alloy is also very high. It is estimated that it is difficult to meet the requirements.
To be honest, the price of titanium alloy itself will not be very expensive. my country itself is a major titanium producer. Titanium is also not a true rare earth metal. Its stock is very large.
Why is the price of titanium alloy so expensive? Mainly difficult to separate and difficult to process.
The process requirements for the later processing of titanium alloys are very high.
For example, titanium alloy spectacle frames. The cost of raw materials is actually dozens of dollars.
However, to process the titanium alloy into a mirror frame, the process requirements are very high. Few factories can do it.
Gas impurities (oxygen, nitrogen, hydrogen, etc.) have a great influence on the machinability of titanium alloys, because titanium has high chemical activity and is easy to combine with gas impurities. When the temperature exceeds 600 degrees, titanium is oxidized to form an embrittlement layer, the so-called "structure alpha layer"; it produces hydrogen embrittlement with hydrogen; and forms hard and brittle TiN with nitrogen at high temperatures.
In addition, the plasticity of titanium alloy is small, which obviously affects its plastic deformation during cutting. The deformation coefficient of titanium alloy is only 1 or even less than 1, while the deformation coefficient of ordinary carbon steel is about 3. During cutting, the chip has a very small contact surface with the rake face, which makes the contact area pressure and local temperature high, and the tool wears quickly.
Severe work hardening occurs when titanium alloy is processed. When C>0.2, the titanium alloy will form hard carbides, which will cause abrasive wear to the tool and reduce the machinability.
The titanium alloy specification required for nuclear submarines is titanium 64, which requires very high grades.
For now, the titanium alloy processing technology of Lao Maozi is relatively advanced in the world.
Even the United States, Dongying, and Germany cannot compare with Lao Maozi. Therefore, Lao Maozi used to build several titanium alloy nuclear submarines.
Until now, these titanium alloy nuclear submarines are Lao Maozi's secret weapons and have never been easily revealed.
Even if the Typhoon-class is pulled out for advertising, these titanium alloy nuclear submarines must be hidden.
The Americans also want to build titanium alloy submarines. It is a pity that the processing technology is not good enough.
Of course, these are digressions.
For the time being, it is out of Wang Bu'an's consideration.
For Sheng Huainan, just ignore it.
"preparation!"
"Reload!"
The test crew issued a password.
A heavy shell was lifted cross by four people and stuffed into the barrel.
A 255 mm caliber cannonball weighs more than 270 kg, and four people must move together to lift the cannonball smoothly.
In fact, even if it is operated by four people, it is very exhausting. The requirements for arm strength are very high.
It must also be the use of specially customized clamps.
The PLZ255 super heavy gun is not self-propelled. It is drag-and-drop.
Its barrel is too long for the self-propelled type to achieve balance.
Only the ancient traction can be satisfied.
However, the weight of PLZ255 itself is less than eight tons.
Relatively speaking, this weight is still very light. At least lighter than the American 240mm howitzer.
The American M1 240mm howitzer has a total weight of 22 tons. The maximum range is only 23 kilometers!
With a weight of eight tons, ordinary roads are passable. There are no obstacles.
"Fuck!"
"Fuck!"
The shell was stuffed into the barrel.
Then, piece after piece of propellant was inserted.
This propellant is a big bright spot. Its portion is very adequate.
The weight of each propellant pack is one hundred kilograms. It also requires four people to operate. It's still a bit difficult for a person to hug.
When it is at most, five propellant packs can be inserted. That is, five hundred kilograms of propellant.
The propellant of ordinary artillery is certainly not so terrifying. Up to tens of kilograms. Will not exceed one hundred kilograms.
Why use such a large amount of propellant? Five hundred kilograms?
Of course, it is necessary to pursue the maximum range.
How can the propellant without super abnormal components reach a distance of 130 kilometers?
There is actually no upper limit on the amount of propellant. There is no problem when it is made into several thousand kilograms. The key is that the barrel and barrel must be able to withstand it.
If the weight of the propellant is too large for the barrel to withstand, a bombing accident will occur.
Even if the chamber is not bombed, the barrel life will be greatly shortened.
The range of the PLZ45 self-propelled artillery is not particularly long.
The American M1 240mm howitzer has a range of only 20 kilometers.
The main reason is also the problem of propellant.
Can't hold too much propellant.
Otherwise it will explode.
Only Wang Bu'an is not afraid.
"Whatever you want!"
"Install as many as you want."
Wang Bu'an said very readily, "500 kilograms, five thousand kilograms, there is no problem!"
Of course, Chai Lufeng couldn't take his words seriously.
Thousands of kilograms of propellant is really stuffed?
Others will treat him as a lunatic.
It doesn't matter if Wang Bu'an is a lunatic. He Chai Lufeng doesn't want to be a lunatic.
In the end, it was determined that the shell is 270 kg. The weight of the propellant is 500 kg. The relationship between the two is one to two.
This ratio can be regarded as a wonderful precedent in the artillery field.
It is estimated that others dare not imitate.
why?
A hundred percent bombing!
The enemy didn't explode to death, first exploded himself to death.
"Fuck!"
"Crack!"
There was a dull sound.
The buckle fell, and the barrel was tightly sealed.
"emission."
"boom!"
The test crew pulls the rope.
The whole ground seemed to vibrate violently.
The 255 mm caliber gun popped out of the chamber, and its power was too strong.
Before, those large-caliber naval guns could even form a hurricane on the muzzle when they were launched.
The hurricane spreads around and can sweep all nearby people into the sea.
Such a tragedy happened on the battleship Yamato in Dongying during World War II.
A volley of heavy guns with a caliber of 460 millimeters swept hundreds of sailors into the sea, leaving no bones.
The diameter of 255 mm is completely different from the diameter of 460 mm.
However, the muzzle hurricane that erupted from PLZ255 was also very terrifying.
Dust flies around the entire artillery position.
Cover the sky and the sun, the sun and the moon are dark.
Wang Buan must cover his mouth and nose with a handkerchief.
Otherwise, as long as you want to breathe, whether you use your nostrils or your mouth, you will inhale a lot of dust.
After a full minute, the dust did not dissipate.
Wang Bu'an shook his head and backed away again and again.
If this continues, he will suffocate.
At this time, the test crew had already started the second round of preparations.
Frankly speaking, the launch speed of the PLZ255 heavy artillery is very slow. The theoretical rate of fire is only about three rounds per minute.
If the gunners are well-trained and skilled in cooperation, the speed can be increased to four rounds per minute. However, this is already the limit. It is impossible to continue to increase speed.
This is due to the drawbacks of large-caliber artillery. The launch speed is too slow. This is true even with automatic loading machines.
Of course, for super-caliber heavy artillery, the launch speed is not a problem.
The key is hit rate and lethality.
A video from a distance came.
The cannonball fell.
"Boom!"
"Wow!"
The entire surface of the water seemed to be boiling.
The shell directly lifted a water column over thirty meters high.
A full 275 kilograms of shells! The warhead charge exceeds 200 kg. Its blasting power can be imagined.
"Shit!"
"Wow!"
Suddenly, an accident happened.
On the surface of the sea, suddenly an octopus sprang out.
It swings its tentacles frantically, as if to express something. Soon afterwards, it slowly sank again.
"Observation point, what happened on your side?"
"Observation point, what special situation did you find over there?"
"The observation point reports the launch point! A super huge octopus was blown to death."
"Super huge octopus?"
"Look..."
Good guys.
It really is a huge octopus.
Its body is fifteen meters in size. For octopus, this is a very scary body shape.
The key is that it has a lot of tentacles.
The longest tentacle is even more than fifty meters.
"Oh my God! Couldn't it be the deep sea monster that was blown to death? Such a big octopus!"
"I don't know! Can anyone of you be sure?"
"There is no way to be sure..."
Everyone was surprised and happy.
This sea test ~EbookFREE.me~ is really powerful!
The lethality of a 255 mm shell is indeed not covered. After all, it is a 200 kg high explosive charge.
An octopus of this size was blown to death, let alone an ordinary fish.
"Good! Good! Good!"
"Great! Great!"
Tau was very satisfied.
What he wants is such an effect.
All he wants is to be able to blow up these octopus.
Now the coast of South Africa will be occupied by these variants of octopus. Must find a way to eliminate them.
These heavy guns with a caliber of 255 mm just meet this need.
Just bombard the sea.
From an economic point of view, it is definitely more cost-effective than flying a plane.
A 500 kg aerial bomb costs tens of thousands of dollars. The price/performance ratio is definitely not as good as 255mm shells.
"Boom!"
"Wow!"
The artillery continued to test fire.
One after another shells fell into the sea.
Countless water jets were overturned. It's a spectacle.
By accident, several mutant octopuses were killed. They became the best advertisement for the PLZ255 heavy artillery.
However, Tawu, Mobati and others seem to have still not enough.
"Mr. Wang, is there any further?" Tawu said.
"Mr. Wang, is there a bigger caliber?" Mobati asked.
"Do you need a longer range? A larger caliber?" Chai Lufeng said calmly, "How big do you want?"
"How big can you produce?" Tawu said eagerly.
Chai Lufeng turned his head to look at Wang Bu'an.
This question can only be answered by Wang Bu'an.
The barrel is the most critical component. The range and caliber depend on the barrel!
So, how big can Wang Buan's gun barrel be?