Chapter 258 75

Following the 30mm small-caliber infantry artillery that has appeared, artillery researchers in the territory have accumulated some artillery design experience and tried to scale up the structure of the 30mm artillery. With the initial starting experience, the artillery design team had some confidence before starting to design larger caliber artillery.

Today's 30mm small-caliber infantry support artillery can now fire twenty-five rounds continuously without causing barrel damage after multiple iterative adjustments, material processing and rune optimization.

Ji Lin provided them with design ideas on the ratio of magnification to caliber to see if it could provide some direction for their artillery design.

Rather than simply enlarging in proportion.

Then continue to pour money into it. What is scientific research? Scientific research is an endless waste of money. Until a group of skilled scientific researchers are created - that is not the end of burning money, but the beginning of burning more money!

With the rapid advancement of multiple projects in the territory, every step of progress in each project corresponds to the disappearance of the output value of dozens of acres of farmland. The cost of the materials they use is ten times or even a hundred times higher than the salary Ji Lin paid them.

In this way, the dean of the college came to the office every day to ask for help and money from him.

He first has the vehicle platform, and then he can design the artillery according to the vehicle platform.

Unlike the light infantry support artillery that needs to advance with the infantry, this type of artillery is designed to only rely on aerospace ships for transportation, and it is particularly loose in terms of weight.

The load capacity of the artillery pod is the same as that of the infantry pod, with a maximum load capacity of 2.2 tons. The remaining 3 tons of weight are used for the thick and strong pod protection of the aerospace ship.

Excluding the ship-borne artillery, the weight occupied by ship-borne artillery ammunition is determined by installing two artillery pieces in one artillery pod... Their artillery design can reach a maximum of 700 kilograms/0.7 tons.

With the weight allowance, the barrel design of the artillery was quite wild. None of the plans submitted by the design team were less than 600 kilograms/0.6 tons.

Almost all of them pile materials on the barrel without restriction to offset the bore pressure, and the large amount of charge causes damage to the barrel.

"We use 75 mm, 25 times the diameter, and a total length of 2 meters. Including the total weight of the bracket is 650 kilograms, the effective range is 800 meters, and the maximum range is 1,500 meters. The first batch has a total of six doors and three pods, and the rest The two pods carry shells and ammunition bags.”

The researcher saluted him and told him the answer he had prepared for a long time.

75 mm, about three inches of six-pounder gun.

Ji Lin was thinking, and felt a little itchy when he saw the Seagull-class aerostat that had begun to land in the distance.

He has not been exposed to this kind of normal artillery of standard caliber for a year. Although the 75mm artillery is less powerful, it is a standard artillery independently developed and produced by the territory.

It is also capable of fighting against thicker carapace.

But if it's something like the Governor's mecha, which is made of steel, or the giant ancient tree owned by Li Yan is covered with thick bark. The power of 75mm is extremely limited, and it is considered successful if it can penetrate armor.

You have to wait until the professional anti-giant 152 and 203 smoothbore cannons appear to effectively fight them...or just take out the 400mm upward mortar and smash it to death.

It's a pity that Ji Lin doesn't have a special technology tree for mortars, and only focuses on artillery.

"Come on, take me up there and give it a try. Let's set up two targets and try it out."

Ji Lin smacked his lips, with joy on his face, and asked the officers to get on the boat with him.

Rub hands together.

"Have you prepared the corresponding tables for charge, falling speed, and range?"

He walked to the pure black casting barrel, which was engraved with runes that faintly flashed purple light. It was very strange. It is as if there is life flowing in it, and the substandard steel materials are strengthened in a special way, allowing them to show higher structural strength.

The sliding and rotating bracket that supports the gun barrel is also engraved with corresponding runes and floating stones to make the gun bracket easier to rotate, which shows that they have put in the effort.

Runic literature...

"Done!"

The engineering college student was stunned, took out a small notebook from his pocket and handed it to Ji Lin.

Ji Lin quickly glanced at what was written above and nodded happily. The researchers conducted the test using prescribed medicine packs according to their own requirements, which means that soldiers do not need to worry about adjusting the amount of medicine packs bit by bit.

Let this student teach him how to do it. Although the other student was flattered, he still cautiously guided Ji Lin on how to operate the 75mm front-loaded artillery. They completed the loading step by step, measured the distance, and placed the charge.

Aim and fire.

On the ground in the distance, small camps are being built using the remaining building materials from the territory, and target groups are set up at 200, 400, 600, and 800.

Limited by the shooting window of the pod, the firing angle of the 75mm ship-borne artillery mounted on the internal gun mount is also limited, with only 10-15 degree angles adjustable up, down, left and right. You can only rely on reducing the charge to adjust the shells to hit targets at different distances.

Different from the firing of muskets and 30mm artillery, the 75mm is already a real artillery. When firing, a dull and translucent sound is transmitted through the thick shell of the pod.

The rotating projectile exited the chamber in the bursting flames, losing the accuracy provided by the rifling, but also had higher chamber pressure and initial velocity, accurately penetrating and shattering the temporary tents built with wood in the distance.

400 meters, 12 out of 16 shots, 75% hit rate.

The officers who heard the sound of this kind of artillery for the first time looked at each other in surprise. This was their first time to come into contact with artillery of this caliber. The researcher from the School of Engineering treated it as normal. He tested the firing effects of different artillery several times a day.

Ji Lin thought of a small problem... He forgot to equip the soldiers with soundproof earmuffs.

The charge of the 75 gun would not directly cause serious damage to people's hearing, but no one could tell if it was close to them for a long time. It would be better to equip them with soundproof earmuffs.

Taking the paper and pen handed over by the officer, Ji Lin wrote down his suggestions and improvements for the new 75 gun on it - he also had to start writing artillery drills for the territory, and his rare rest time was about to disappear again.

He was very satisfied with the new artillery, but it was a pity that it was still a little less powerful.

If I could move a 120mm gun...

‘75mm shipborne muzzle-loading smoothbore gun’

‘Range: 800’

‘Weapon power: 175’

‘Gunpowder: Provides additional armor penetration and range, but the overheating time of the barrel is extended with each shot. ’

‘Armor penetration: This unit has a significant penetration effect on high armor when using slugs. ’

‘Shotgun charge: +100% damage to low armor units, -50% effective range. You definitely don’t want this thing firing at your infantry line, believe me. ’