Chapter 469: Magical Gun

The "Italian gun" uses a screw breech block.

The screw-type latch body is installed on the lock leaf fixed on the side of the gun breech and can rotate freely when opening and closing the latch.

The thread surface of the latch body is divided into several even-numbered sections, and the threads are cut off in every other section.

The threads on the inner surface of the breech are also processed in the same way, except that the threaded section is exactly offset from the threaded section on the latch body.

When closing the latch, the threads on the latch body and the corresponding threads on the inner surface of the breech first engage with the teeth.

Then the latch handle can continue to move. At this time, the gear under the latch handle will drive the latch body to rotate in a circle, tightening the threads on the latch body and the breech.

This is the basic principle, and of course there are many accessories, such as a safety device that prevents the latch body from turning back and opening during shelling; a device that automatically resets the mechanical firing pin to the firing state when the latch is closed; and manually resets the firing pin to the firing state after a firing failure.

Devices for re-launching; and safety lock devices, etc.

As for the tightening plugs used at the bottom of the ammunition bags, observation equipment for gun sights and other devices, that is a very, very later matter.

Su You had only seen the shape of the Italian cannon in the military museum, so he could only roughly draw a shape for Shi Fu, then explain the principle of the breech block, and finally let him use his own brain.

But he picked on the weak and presided over the research and development of simple equipment mortars and mortars.

This is too simple.

The requirements for the mortar barrel are not high and can be achieved using the mature iron mast technology.

What was produced was still incomparable to that of later generations. Although the barrel was bored after it was made and the concentricity was guaranteed, it was still much thicker. It could only fire 50mm bullets, but it weighed as much as later generations fired 80mm.

The mortar shell weighs one hundred and thirty kilograms.

And for the safety of the shooter, instead of relying on the mass of the projectile itself to cause the primer of the projectile to hit the firing pin at the bottom of the barrel, it relies on its own mass to slide to the bottom of the gun body, and the shooter hiding behind the bunker pulls the pull cord to release the firing pin and impact the shell.

Bottom primer.

This is a design that Su You made because he was not confident about today's steel manufacturing technology and wanted to prevent the gunner from being injured by the explosion.

As for the rest, it is almost the same as the mortars of later generations.

The projectile body is made of cast iron with a lead-enclosed gas ring, and the bottom end of the tail pipe is internally threaded. The basic charge tube is installed and screwed to the primer. Several different muzzle velocities and firing ranges can be obtained by adjusting the number of additional charge packages.

The mother gun is actually the Fran machine gun introduced from abroad during the Ming Dynasty. The mother gun has a slender barrel and a smaller caliber. The gun body is equipped with a front sight and a rear sight, which can aim and shoot at long-distance targets.

The rear part of the gun is thicker and has a long slot for loading the gun.

The sub-guns are similar to cannonballs. Each main gun is equipped with nine sub-guns, which can be loaded with ammunition in advance. During battle, they can be loaded into the main gun in turn and fired, thus increasing the firing speed.

However, because it uses wrought iron instead of cast iron, the thickness of the tube wall is much lower than that of the Fran cannon, and the weight is reduced to two hundred kilograms.

And due to the development of Meishan precision machine tools, although it is a split type, its sealing performance is much better than that of the Folang machine in the Ming Dynasty.

The difference from the Folang machine is that the musket tail also has a screw device, which can adjust the position of the bottom bracket at the bottom of the barrel.

If it is rapid fire, the bottom bracket should be set further back to facilitate the loading and unloading of the gun.

If it is a slow fire, after the sub-gun is installed, you can shake the chassis and the bottom bracket will hold the sub-gun tightly so that the sub-gun and the barrel are closely combined. This can increase the air tightness and obtain a longer range.

In addition, it uses a nearly modern medicine bag, so the range is much longer than that of the Ming Dynasty Franco machine gun. The nine-foot-long double-shot gun has one pound of ammunition and one pound of medicine. When fired rapidly, it can attack a target four hundred meters away.

, when firing slowly, it can hit more than a thousand meters away.

These two types of artillery, one with horizontal firepower and the other with upward firepower, fired explosive shells, which Su You thought was enough.

Of course, this is just a test product. In addition to understanding the principle, a large amount of experimental data is also needed to achieve the best results.

Both of these are flexible and mobile offensive firepower. Su You felt that it was not enough, so he invented a third type.

Fortress gun, the barrel is three meters long, weighs one ton, has a caliber of 150 mm, and a shell diameter of 140 mm. The amount of gunpowder is nine kilograms, or four kilograms of nitrocellulose. The shell weighs twenty kilograms. When filling the gunpowder

, the effective range is 400 meters, and when filled with nitrocellulose, the effective range is 600 meters!

In addition to being used as a fortress gun in conjunction with a bastion, the most important thing is that it can be installed on a giant ship in combination with a mother-and-son gun and used as a weapon in naval warfare!

However, this is a front-loading gun, and its rate of fire is very slow. Before the invention of the breech-loading gun, you could only play with it like this.

As for rockets and the like, the accuracy is too poor, and large-scale coverage means burning money, which cannot be afforded.

Zhong Yi was going crazy. The horse-drawn ballista and porcelain bullets had already made him feel that he could conquer Xixia and conquer Yanyun. Now that he had this, let's include the Liao Kingdom and Goryeo.

Su Youpa hit him on the back of the head: "Arrogance! War is about national strength and logistics, otherwise it's just giving away people and equipment!"

"Honestly, give me statistics on the experimental data, the ratio between charge and bullet weight, the ratio between barrel and firepower, the design of the gun carriage, the design of the aiming device, and the design of the control device. I will leave these all to you!

"

"There are also tactics, how to use these things to cooperate with the existing army to complete rationing, transportation, and combat. This is also a topic."

"Then how many operators, horses, and ammunition can be equipped with a gun; how many guns can form a unit, and how many troops can be matched by a unit; how many maximum clusters are reasonable, and how many guns can be commanded by one commander..."

"How to observe the enemy's situation, how to transmit message parameters, how to improve combat efficiency, how to match ammunition types, all of these must be studied! Things are not made for you to waste! You must form a set of tactics!"

Zhong Yi raised his hand: "Then I want to do a lot of live shooting!"

Su You said: "It's up to you, but you must pay attention to safety. This is equivalent to sending a twenty-pound thunderbolt hundreds of meters away. If it explodes, it will be a very scary thing."

"Every time you test, you must hide behind the reinforced concrete bunker! Once you are caught by me and do not follow the test regulations, just once, you will be permanently disqualified from the experiment! Go back to Weizhou to practice bows, arrows and knives with your brother!"

Artillery is only the most important scientific research project at the Dizhou Military Test Site. In addition, firearms and individual explosive weapons are also the focus.

The problem of long barrels has almost been solved by Shi Fu. He changed the shape of the barrel from a cylindrical shape to a regular hexagon, which instantly solved the problem of machine tool clamping.

After this problem is solved, you can use a high manganese steel milling cutter to bore holes and rifling the soft iron, and then use carburizing and heat treatment to make the barrel hard on the outside and soft on the inside. The problem with the barrel is basically minor.

Instead, ammunition became a bottleneck.

Brass-cased bullets like those used for Shiwei's revolver gun, in which the propellant and primer are separated by copper caps, are too difficult and expensive to process and cannot be mass-produced. Therefore, paper-cased bullets with a rear-mounted pin are used.

Su You’s first choice.

The final product, except for the hexagonal barrel, is very similar to the later Dreiser rifle, plus a Mauser m1871 safety.

This is a real rifle. It weighs nine kilograms empty, is one meter three meters long, has a barrel of eight hundred millimeters, and has four right-hand riflings.

The bullet uses a paper tube as the shell, which integrates the projectile, propellant and primer.

When loading, use the bolt to push the bullet into the cartridge from behind. The bolt moves forward to press against the barrel, and the needle is retained at the rear by the trigger.

After the trigger is pulled, the firing pin pops forward, pierces the paper case, strikes the primer, ignites the gunpowder, and shoots the projectile.

The gunpowder uses black powder modified by potassium nitrate, which can greatly save costs and has an effective range of 300 to 800 meters.

It can be said that except for the hell of a service life, there is almost no difference between things and later generations.

In order to increase the service life of the barrel, the warheads were forced to use flat lead bullets, and some steel core lead bullets were used for special purposes.

Today, this gun is still being modified. Because it is a paper-cased bullet, it will cause the gunpowder gas to escape from the contact point between the bolt and the barrel, causing the bullet to lose part of its kinetic energy.

In fact, it is not difficult to solve this problem in theory. The first is to use a brass cartridge case to make the barrel and bullet in closer contact. The second is to wrap the bolt, barrel and bullet so that the gas will not leak.

The initial test product looked like a strange iron rod placed horizontally on a weapons rack. After the iron rod could actually fire effectively, the core part was successfully developed, and then the attachments were added.

When you should do addition, do addition, when you should do subtraction, do subtraction.

For example, if the barrel is finished, it does not need to have the same thickness at the front and back. The explosion will mainly impact the bottom of the barrel.

In other words, after the internal boring is completed, the appearance can be polished to make it grow into a tapered barrel to reduce weight and adjust the center of gravity.

Another example is the design of sighting systems, bayonets, wooden handles and other supporting facilities.

But these are all things for later. This magical musket can transcend muzzle-loading muskets, matchlocks, flintlock guns, and breech-loading flintlock guns. It has evolved in one step like a shark, allowing Su You to compete with Meishan for fifteen years.
Chapter completed!