Legend has it that mental retardation is contagious, so if you scold a person for being stupid, you can ask: "Did you let the fool touch it?"

At present, it seems that 'coarse nerves' can also be contagious, at least, several guys from the earth have been infected by Liu Jingtian into optimists, and they don't know how to write the word 'sorrow'. Pen "Fun" Pavilion www.biquge.info

In this bloody era when 'justice only exists within the range of cannons', a few people grabbed the port city that the Portuguese had operated for more than 100 years at the intersection of the 'Eurasian trade route' and the 'European and American trade route', and then began to bury their heads in farming regardless of it.

Fortunately, someone who is 'safety first' has also been killed all the way in several worlds, and this kind of thing has become instinctive. After getting the locals, he started building factories and equipment as soon as possible.

Now there are slaves to call, the kobold do not need to plough the fields and mine by themselves, and the shipyard has not started for the time being, and there is a serious surplus of 'dog power resources', and there are enough people to cast cannons and build fortresses.

Liu Jingtian first walked around and found that there were many iron rods, coal, and various unknown ores in the warehouses everywhere.

After all, Agadir started as a trader, and these things were sold well in the colonies of Africa and Asia. In the nearby oases, large and small, the Saracens are also in great demand for metal.

This is not counting the cold weapons, muskets and artillery confiscated by the dogheads, and there are still a large number of burned wood and ship materials on the dock, which are still no problem to use to burn charcoal to make steel.

But the first question is, what cannon do kobolds want to make?

The enemy to be faced in the future, the level of cannon casting is not below the kobold, and there is definitely no future for eating the old book.

Liu Jingtian didn't have a clue. Eighteen pounds is good, but it is too heavy to pull, and the muzzle is too high, and the dog's head has to climb the ladder to load the shell!

Twelve pounds obviously has no technical advantage, I'm afraid it is only suitable for abusing vegetables.

Let's go to the castle and maybe have some ideas.

In the castle of the Portuguese, the most impressive thing was the two broken bronze cannons. This is a thick and long 'Ko Feilin', also known as a snake cannon and a Hongyi cannon, weighing more than twice as much as the 'eighteen pounds' used by kobolds.

It doesn't matter if it's broken, the kobold have never built a cannon with a length-to-diameter ratio of more than fifteen, and these two waste cannons are very copycat valuable. Moreover, the melting point of the bronze itself is low, so it can be melted and recast.

Liu Jingtian also knew that bronze was more suitable for making cannons, and its life and heat dissipation would be much stronger. But this thing is too expensive, and it was either unaffordable to build before, or there were no materials, how can it be compared with the rich Portuguese!

However, after living a poor life, it is really a bit reluctant to use bronze casting cannons, and the dog-headed cast iron technology is strong, so it can be completely combined......

As a result, a new variety that combines the local and the foreign appeared. The structure imitates this snake cannon, and the dog head man has made a kind of 'dog version of the snake cannon' with copper inside and iron outside, and the performance is not inferior.

First, use the iron fan method to make the iron cannon body on the outside, and then continue to use the iron fan to pour bronze into the inside of the iron cannon body. Because it is divided into two pourings, the phenomenon of thermal expansion and cold contraction is not serious, so the success rate is very high.

Because I also 'picked up' some bronze ornaments - all kinds of bells and statues, so the bronze is enough, and this 'dog version of the snake cannon' is one after another, and it can't be stopped at all.

On the other side, the remaining breech guns, which were called 'Furlong Machine' in the East, although they were a little powerful, were very light and had an extremely fast rate of fire, which also made Liu Jingtian very interested.

The 'Franky' gun, because it has no advantage in weight and range, but the rate of fire is faster, so it is actually outdated in this era.

Its structure is quite similar to the later 'copper cartridge breech gun', and the gunpowder and projectiles are packed in a large iron drum - this part is called a sub-gun - a bit like an oversized copper-shelled bullet.

Then stuff it into a 'barrel that is open both front and back' -- this part is called a female gun -- and it's ready to fire.

This structure is similar to that of a revolver, but the same is true - the airtightness is not very good, and the gap between the cartridge case and the barrel leaks gunpowder gases.

Therefore, the 'Furlong machine' must not be too big, otherwise the leaking gunpowder gas will bring down the gunner next to him first.

Liu Jingtian personally watched this weapon and put a few shots to feel it. I always feel that this thing is still very useful if it is changed.

"To use the analogy of the weapons of later generations, the arquebus is a pistol and a submachine gun, and the lethality is less than 100 meters. And an ordinary field gun is a machine gun. With solid bullets, the range can reach more than a kilometer, while scattered bullets can range from zero to three or four hundred meters. If you shoot a curved shot, the range is longer, but you can't hurt people by bouncing, and you can only use it for siege.

"There is a gap between this firepower, and you need to light artillery to make up the firing distance between 400 and 1,000 meters. However, this distance of twelve pounds can actually be played, but the efficiency is a little worse. If the new artillery does not have a particularly big advantage, it seems that there is no need to make another artillery and mess up the logistics. ”

After struggling for a while, Liu Jingtian still felt that the breech gun was loaded quickly, and this advantage could offset the logistical difficulties and liberate those heavy guns. However, of course, you can't copy the 'Furlong machine', which is about to be obsolete, and on this basis, it is necessary to strengthen the airtightness, and maybe it can be transformed into a good weapon.

As for the modification of the breech gun, for modern people, it is actually quite simple. For example, the pressure cooker is airtight and the structure is very simple. With this idea, pinch it with mud, and the clay mold of the new equipment will come out.

If we use the pressure cooker as an analogy, the 'sub-gun' that fills the back with gunpowder and cannonballs is similar to the 'lid' of a pressure cooker. The part where the "lid" and "body" are combined is made of two metal rings inside and outside, just enough to put the "rim" into it. Hardwood flakes are also used to make gaskets to reduce the gap.

Anyway, if it is broken, it can be replaced at any time, so that there is a lot less gas leakage.

At the same time, there is something like a latch behind the 'sub-gun' that can be fixed to the base, and the huge recoil is borne by the 'latch'.

Next, it depends on the processing accuracy of the kobold, as long as the sample is okay, it can be finalized.

Finally, there was the terrifying 'stone cannon' of large caliber, which was so heavy that the muzzle of the cannon was destroyed by the eighteen-pounder cannon before it could turn its direction. Liu Jingtian was not interested in this kind of bulky old antique, and directly asked people to dismantle and smelt the bronze.

The blacksmiths and cannon casters were busy, and the carpenters and the 'construction corps' did not waste time. In the following days, a series of factories and workshops were also in full swing.

Construction began on a blast furnace with a regenerator and continuous tapping, and supporting facilities such as a steel tank and a crucible furnace were also put on the ground, as well as a large number of machine tools in the gun factory.

Kobolds' cannon dependence, I'm afraid it's getting worse and worse.