Mu Feng let Yiwu hug him, and the two of them sat quietly in Yiwu for a while.

Mu Feng waited for Yiwu to sit up straight again before whispering:

"Alright, now I'm going to replace you with the electromagnetic cannon that Neptune told you about in the morning, and this needs a small transformation, just sit there and don't move!"

Yiwu was surprised when he heard this: "Do I also want to change the electromagnetic cannon?" My hull is too small, can it fit? The electromagnetic cannon consumes so much energy, even if it is installed, I can't shoot a few rounds! ”

Mu Feng smiled and said: "You are wrong, the electromagnetic cannon system occupies less space than the gunpowder cannon, and it can be loaded with gunpowder cannons, of course, it can be equipped with electromagnetic cannons of almost the same size."

"And the energy of the electromagnetic cannon ultimately comes from fuel, which has an energy density 10 times that of TNT explosives, so the shooting will only last longer after replacing the electromagnetic gun."

"Oh...... That's right! ”

Yiwu suddenly realized that as a ship mother, Yiwu is clear about the energy density and actual utilization rate of fuel, explosives and other materials.

I just didn't remember it before, but now Mu Feng reacted immediately when he mentioned Yiwu.

The energy density of TNT explosives is 4200 kilojoules per kilogram, and the final energy utilization rate is 30%.

The energy density of diesel is 42,552 kilojoules per kilogram, and the final energy utilization rate is also 30%.

The thermal efficiency of the gas turbine is 42%, the efficiency of the generator is 95%, and the energy conversion rate of the electromagnetic gun is 75%.

42%×95%×75%≈30%。

The same weight of fuel oil contains 10 times more energy than explosives, and because the energy utilization rate is the same, the final effective energy produced is still more than 10 times that of explosives.

Although diesel has just over half the gravity of TNT, diesel is liquid and can fill any shape of storage space, and fuel does not require round, uneven metal cartridge casings or large medicine packs, which saves a lot of space and weight.

Therefore, if you calculate the volume of the occupied cabin, the difference may be more than 10 times.

That is to say, with the same large space, after changing the electromagnetic gun, the propellant reserve is directly increased by 10 times!

Moreover, after full electromagnetization, the energy stored in the hull is unified.

If you don't need to fight, all your energy can be used as fuel for sailing.

If there is a need to fight, the fuel of the entire cabin can be used as a propellant to fight.

Whether it is used to fight guns or run away depends entirely on the actual needs and can be deployed at any time.

The integrated all-electric system and the electromagnetic gun system can be said to be a perfect match, and the organic combination of the two will be a subversive and comprehensive change for the shipborne artillery system.

Even if the huge power of the electromagnetic cannon is not considered, and it is only used as an ordinary artillery, the electromagnetic cannon still has huge advantages in terms of cost, volume, and safety.

After Yiwu understood, he immediately said, "I'm ready, commander, let's start." ”

Mu Feng nodded slightly, entered the system to find Yiwu, and before replacing the electromagnetic gun, he first upgraded the hull of Yiwu twice.

The total power of Yiwu's original diesel engine was only 11,000 kilowatts, which was not enough to support the consumption of electromagnetic guns, so Mufeng wanted to replace her with a gas turbine.

As a corvette, Yiwu has a very small hull and a lot of equipment, and the remaining space can only put a set of 40,000 kilowatts of gas turbines.

Mu Feng simply calculated, 40,000 kilowatts of power generation, for a 76 mm electromagnetic gun, when the muzzle velocity is 5 times the speed of sound, the theoretical rate of fire when stopping the ship to shoot will reach 240 rounds.

At the current level of technology, even two barrels cannot reach such a high rate of fire, and 4 guns will take up too much space, so give up this limit rate of fire for the time being.

It sails at a speed of 33 knots with a maximum rate of fire of 120 rounds, and at a speed of 35 knots, with a maximum rate of fire of 60 rounds.

When the muzzle velocity is 7 times the speed of sound, the rate of fire is halved at the same speed.

At muzzle velocity of 10 times the speed of sound, the rate of fire at the same speed is reduced to a quarter.

This power and rate of fire are completely sufficient, and the small hull of Yiwu will also have an impact on her own if she shoots 10 times more shells, so she will not use it under normal circumstances.

In the end, Mu Feng installed a twin 76 mm electromagnetic cannon in Yiwu, with a maximum rate of fire of 60 rounds per minute for a single barrel and a total rate of fire for 120 rounds per minute.

The other two 30mm cannons were also replaced by Mufeng with electromagnetic, the rate of fire basically remained the same, and the power was increased to a certain extent.

The weight of the small-caliber electromagnetic gun is too light, and the velocity decays quickly after discharge, so the marginal benefit of greatly increasing the muzzle velocity is not large.

Therefore, the muzzle velocity limit of these two small cannons is only 5 times the speed of sound, which is about two-fifths higher than the original gunpowder cannon.

In this way, Yiwu has also become the first ship in the entire headquarters to completely abandon gunpowder cannons, and all the main guns and auxiliary guns of the whole ship are electromagnetized.

Mu Feng confirmed the transformation plan, and Yiwu fell into a dormant state in his arms.

The transformation range this time is medium, but the Yiwu hull is small, and the time required is relatively short, less than 20 minutes, Mu Feng did not put down Yiwu, just hugged her and waited for her to wake up.

After the transformation of Yiwu was over, Mu Feng slept with her for a while, and in the afternoon, he met Sirius, Neptune, Crimson, and Frost to go to the exercise ground to test Yiwu's electromagnetic cannon.

A while ago, the Second Fleet followed Changchun and Li Sai to France to help, and later the First Fleet was also called by Lanzhou to help, while the Third Fleet was usually stationed in Italy.

Now the rest of the fortified area is the Fourth Fleet and the task force, and the personnel gap is too large, so there is no formal confrontation exercise in the form of ranking.

Some people are doing daily training, some people are directing the robot to work, and two groups of people take turns.

The entire fortified area is very large, and the construction of the overall defense still requires a considerable period of time.

Now that the exercise ground is completely empty, after Yiwu unfolded the hull and put it on the field, Pachina used a helicopter to drop fixed targets of different sizes and structures.

After Yiwu aimed, one shot at a time, penetrated layer by layer, and there was no obstacle at all.

The fortified area has a fully functional drill and test ground, so you can see the power of the electromagnetic cannon more intuitively and quickly.

The 1,400-ton frigate, with its 76 mm guns, has a rate of fire of 120 rounds per minute, and is capable of penetrating battleship-class armor when released at full strength.

The 155 mm electromagnetic cannon with a maximum of 300 megajoules was able to penetrate the armor of battleships with ease, and the caliber of 155 mm guns was already capable of firing nuclear warheads in modern times.

If it is on the earth, even if modern electromagnetic guns are really mature and popularized, the major powers will not build tens of thousands of tons of battleships out of cost considerations, it is better to build a few more 10,000-ton drives.

If you have a ready-made battleship in this world, of course, you still have to make good use of it.

Mu Feng thought so, turned his head to look at the frost and crimson around him, the two of them were motionless, their eyes looked at Yiwu on the field without blinking, and there seemed to be starlight in their eyes.