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As for the drilling method, Lam's method is to use a hydrodynamic simple lathe.

The so-called simple lathe is an enlarged horizontal hand drill, but it uses water power instead of hand crank. The original drilling is a manual inch by inch drilling, and vertical drilling, time-consuming and laborious, the use of simple lathe is to fix the barrel horizontally on a shelf that can be rotated by itself, the drill bit cutter is fed horizontally, so that the efficiency of drilling is several times higher than the original, it originally took a month to drill a barrel, and now five or six days can drill out a high-quality barrel with smooth bore.

The successful production of the barrel can also be regarded as an improvement of the original process, and the production of the bolt is a revolutionary improvement.

The Ming army's bird gun is the arquebus, its structure is, there is a metal hook on the gun, one end of the hook is fixed on the gun, and can rotate around the axis, the other end clamps a burning rope, when firing, the metal hook is pushed into the fire door by hand, so that the fire rope ignites the black powder, and then the projectile contained in the gun chamber is fired.

Compared with the flintlock pistol, the arquebus has many drawbacks, the most obvious is that the shooting process is very complex and slow, Qi Jiguang recorded 10 procedures for using the arquebus in the "Qi Jiguang Art of War", and in Europe, the "Weapon Practice" published in 1607 described the firing steps of the arquebus, which is divided into 25 steps, which is very cumbersome; The second is that rain, snow and windy weather cannot be used, the rain will wet the ignition of the medicine door, and the wind will blow away the ignition powder of the medicine door.

The flintlock pistol solves the above shortcomings of the arquebus, its ignition device is to clamp a piece of flint on the jaws of the hammer, and a blow anvil is provided on the side of the fire hole, when shooting, pull the trigger, and under the action of the spring, the flint is hit on the side of the fire door, and a spark emerges, igniting the gunpowder. The firing process is greatly simplified, the firing rate and shooting accuracy are improved, and it is easy to use.

As a mature standard flintlock pistol, compared with the early simple flintlock pistol, the bolt adopts an improved wheel wedge core design, this new device is also the standard design of all flintlock pistols in all countries in the later period, the wheel wedge has two fixed cores with tenon grooves and brake damping to form two insurances, the first is to fill the black powder to the primer basin of the mobile ready state, the second is the shooting ready state, the brake iron linkage trigger mechanism can slide up and down, so that it is locked and fired.

In order to make this kind of bolt, Lin Weiye specially drew three views to intuitively depict the bolt structure. As a skilled blacksmith, although Wang Yihammer has never encountered this kind of drawing, he understands it at a glance, and after a few explorations, he successfully made the bolt.

The barrel and the gun mechanism are formed, which means that the main part of the gun is completed, and the next step is to further improve the performance of the gun. For example, brass is used to make gun body accessories to enhance the sturdiness and durability of the musket; Wooden butt and body handguard, the butt is designed as a rooster neck butt type, extended and smooth, and the brass bottom plate is added so that the butt of the two pieces will not spread out, easy to hold and aim close to the cheek, and the barrel handguard is a sleek design that is easy to hold; A new simple crosshair at the end of the barrel is designed to help the shooter aim; Two brass movable gun strap buckles were added to facilitate soldiers on long marches; Two small brass pipes were made of brass and fastened to the lower edge of the handguard as a place to store the gun bar.

The final finale was the casing bayonet mount, in which a sliding tenon bayonet and bayonet mount were installed on the muzzle, so that the bayonet was fastened and did not fall off and did not affect the shooting. Although a bayonet of suitable material has not yet been made, it is also a precautionary measure to reserve a bayonet equipped with a bayonet.

The bayonet is an epoch-making invention of the flintlock era, and its significance is no less than the flintlock ignition replacing the arquebus ignition. Due to the advent of bayonets, the musketeers did not need the protection of the spearmen, and while maintaining the ability to strike at a distance, they had a certain melee ability, and when facing the cavalry, they were no longer as vulnerable as before.

Under the guidance of Lin Weiye, through the craftsmanship of Wang Yihammer, a copycat version of the brown bess flintlock pistol was born a century in advance, this gun is 1.4 meters long, weighs about 4 kilograms, and is expected to reach 1.9 meters after loading the bayonet, which is basically close to the length of a spear, and can be used as a spear assassination at close range.

Lin Weiye reveled in admiring this famous gun born in the 18th century and used until the 19th century, the barrel of mild steel shimmered with metallic light, the embellishment of brass fittings made the body look shining, the ergonomic butt looked so harmonious, the whole gun is simply a work of art!

Xia Nan didn't appreciate the artistic cells of the beauty of the craft, he grabbed the gun, "Try to shoot it, it's a mule or a horse to come out and slip." ”

Lin Weiye took back the gun dissatisfied: "Bad scenery, this gun is the crystallization of modern craftsmanship, it is a work of art, this first gun, I have collected it, I want to try the gun, find another one to try." "Actually, I can't try it if I want to, and I haven't had time to prepare gunpowder.

Xia Nan didn't dare to offend the chief designer, hehe laughed, his heart was itching, and he thought that when the new gun was mass-produced, he would definitely shoot a few shots to test the power. Under Lin Weiye's suggestion, the whole process is divided into four major links: barrel manufacturing, bolt manufacturing, bayonet manufacturing (temporarily vacant), and whole gun assembly.

The next step is to prepare black powder, the gunpowder workshop should not be close to the gun production workshop, for the sake of safety, it was selected on the shore of Bairentan, some distance from the musket workshop and the future artillery workshop. In fact, the black powder of this era was not very powerful, and without an airtight container, it would only burn and not explode, which was also done just in case.

In the summer, Nan transferred some older women from Ma Yuan Village as the labor force of the gunpowder workshop, these women did the high-intensity labor of the textile factory quite hard, but the victory was patience and careful, the preparation of gunpowder does not require much fine craftsmanship, nor too much physical strength, as long as the proportion of nitrate, sulfur and charcoal powder is added, they are completely competent.

According to Lin Weiye's guidance, the optimal ratio of gunpowder for gun firing is 75%, 10% and 15% for nitrate, sulfur and charcoal respectively, and the optimal ratio of gunpowder for gun firing is 78%, 8% and 14%, which is calculated by the British chemist Chevlery in 1825 according to the equation of the best chemical reaction of black powder obtained by the experiment.