After a while, a team of workers arrived at the testing site carrying several long wooden boxes.
They used a crowbar to open the lid of the long wooden box. There was a long metal object stuck in the wooden support, surrounded by shock-absorbing straw.
Tu Shanyue and Lin Yueru looked curiously and saw a worker taking out this long thing and putting it on his shoulders. I couldn't help but gather around to watch it up close.
"Madam, Second Madam, no one can stand behind this, please stand to the side." Chang Zhu saw the two ladies running to the back to look, and suddenly broke out in a cold sweat, and quickly stopped him.
Yang Fan quickly pulled the two of them over, stood behind the rocket launcher and recoilless rifle, and looked into the nozzle behind. Isn't this looking for death?
"Master, what is this thing? It looks so strange." Xiao Niangpi couldn't help but ask.
"This thing is called the Iron Fist. It is a cannon carried by infantrymen. Its scientific name is a gunpowder-propelled grenade. In essence, it is a front-loaded, smooth-bore, recoilless rifle."
Lin Yueru and Xiao Niangpi were confused when they heard it. It was strange that they could understand so many terms.
In fact, this thing was invented by Mustache back in the day and was used to fight T34 tanks among the people. It was a crude thing.
At that time, everyone in Berlin, whether they were 70-year-old men or 10-year-old children, had one. As long as you are aiming at a close range, just open the T34.
This thing is actually very simple.
The early Iron Fist generation used an iron pipe filled with 30 grams of black powder to launch a one kilogram metal warhead to a distance of 30 meters.
Black powder, Yang Fan has it. There is even a special propellant such as maroon gunpowder. The steel pipe can be made whether it is obtained by a fool who collects scraps, cast by yourself from open-hearth steel, or bored after forging.
The warhead is charged with high-explosive fertilizer explosives.
The only difficult thing is the fuse.
This thing is high-tech. From its invention to modern times, it has been a high-tech that all countries attach great importance to.
Yang Fan's warhead is also spindle-shaped, but it does not have a copper shield or hollow charge. He does not use it to resist armor, so it is boring to do this. The real thing inside is a layer of chemical fertilizers, explosives, steel slag and steel ball fragments. The outside is just a thin layer of iron.
This thing is a super-caliber bullet. The projectile is fired out of the barrel. The warhead does not have to withstand the bore pressure like the artillery shell, so it does not need a strong shell. Just have a fairing to reduce air resistance.
Therefore, the charge can be increased, just like a mortar shell. Because of the low chamber pressure, a strong shell is not required, so the charge is much more than that of a shell of the same caliber. It is also much more powerful.
The fuze and the warhead are usually stored separately. When launching, just screw the fuze on the warhead to prevent accidental triggering and explosion.
Yang Fan's fuse was still made of mixing sulfur powder and glass powder, and then adding elastic, copper wire, and small steel pillars.
Because the warhead is a spindle, when it hits the ground, the fuse on the head must hit the ground first.
The small steel column touches the ground and squeezes the copper wire backward. Under the action of the spring, the spiral copper wire rubs back and forth against the mixture of glass powder and sulfur powder, causing it to catch fire.
This kind of fuze has a low firing rate and can cause duds. In order to increase the fire rate, Yang Fan instructed the pyrotechnics team to add backup measures.
That is to say, a time fuse is added.
After the grenade is launched with black powder, the propellant will ignite the fuse behind the grenade. This is a timed burning fuse.
If the grenade hits the ground but the fuse fails, within about three seconds the fuse will burn from the rear of the grenade to the chamber, detonating the grenade.
In this way, the trigger fuze and the time fuze form a double insurance for firing, which basically guarantees that this kind of gunpowder-propelled grenade can have a fire rate of more than 95% and can be used on the battlefield.
Later generations of the Iron Fist continued to increase the range, from thirty meters to sixty meters. In the end, for the best combination of range and accuracy, the range was finally stabilized at 60 meters.
On the battlefield in this era, the accurate range of bows and arrows was often only more than thirty meters. Jiannu often rushed to more than thirty meters before releasing his arrow. Just to ensure the effect of accurate shooting.
At this distance, Jiannu could shoot directly into the eye.
This kind of gunpowder-propelled grenade has a range of 60 meters, which is sufficient in the current battlefield environment. After all, this is a weapon assigned to infantry.
After that, the Soviet Union's RPG2 was a deeply improved version of Tekken. The range has been increased to 150 meters. But the propellant is still black powder.
Theoretically speaking, RPG2 can also create a beggar's version in this era. There are really no big technical barriers.
In fact, it is just a steel pipe, an ordinary one will do. The gunpowder is sprayed out from the back, and it cannot bear pressure or force. The recoilless gun barrel does not have to be a seamless steel pipe.
It can be fired out, and it also needs to be able to explode loudly. Double safety fuses are enough.
It's not a tank, just a high-explosive grenade is enough. There's really nothing difficult about it.
One kilogram of warhead contains 500 grams of fertilizer explosive. The fertilizer explosive is equivalent to 60% of the power of TNT, which is 300 grams. This charge is already very terrifying.
"Master, this thing is very dangerous. Master and ladies please go to the bunker and watch." Chang Zhu said quickly. This thing is not a machine gun, it is no joke. If there is an accident, he cannot take responsibility.
Yang Fan had no objection. This was something that could not be taken carelessly. He quickly took Xiao Niangpi and Lin Yueru to a cement bunker to watch.
"Master, we have made three backups of the ignition device. The first is the firing mechanism of the flintlock gun, the second is the hair tube of the grenade. The third is to directly use an open flame to ignite the fuse of the propellant. There is always one It can shoot out gunpowder-propelled grenades."
"Okay, you've done a good job. You just need to make more backups so that the soldiers can't die in vain on the battlefield with weapons that can't be fired."
After understanding the principle, Xiao Niangpi and Lin Yueru were not so surprised. They were not as shocked as the machine gun. After all, the Ming Dynasty had too many weapons that relied on gunpowder to propel them.
A dragon emerges from the water, a hundred tigers rush with arrows, and there is a swarm of bees. Isn't it just that the warhead was replaced with a metal one, and high-explosive explosives were added? There is nothing strange about it.
"Master, the range we are currently working on is sixty meters. It was made strictly according to the drawings. Later we tried to install more propellants to increase the range. However, after the range exceeded 60 meters, the accuracy dropped seriously. Later it was maintained at six It’s a ten-meter range.”
"The range of sixty meters is enough. After all, this thing is assigned to the infantry squadron. The battalion level will be equipped with three-pound guns. That one has a range of 500 meters. In the future, we will continue to develop Congreve rockets, which are also long-range. There is no need for this thing." Yang Fan said.
Yang Fan knew that the RPG2 of later generations had a range of 150 meters, and also used black powder propellant. This would be studied slowly in the future. Now that the battlefield is in urgent need, it is not necessary to wait for the product to finally mature.
"Sir, do you want to launch it?"
Yang Fan nodded.
This time, Yang Fan didn't need to say anything. Both Xiao Niangpi and Lin Yueru took the initiative to bring earplugs.
"Master, this thing has a shortcoming, that is, it cannot be launched in a confined space, and there cannot be people behind it, otherwise it will be scorched."
"This problem cannot be solved in the short term. It is a pity that it is not convenient to use in the trenches. However, any weapon has weaknesses, and there is no way around it." Yang Fan said.
After the order was passed, the signal soldier's flag was waved.
The worker pointed at the sky at a forty-five-degree angle and pulled the trigger.
The flintlock gun fired quickly, and the gunpowder propellant was ignited. With a bang, the steel pipe made a loud noise, and the nozzle at the rear of the steel pipe spewed out flames and thick smoke.
In an instant, the grenade flew out. Dragging the smoke trail, it drew a parabola in the air.
Chang Zhu breathed a sigh of relief. The flintlock bolt did not lose its chain this time. There is no need to pull the fire tube or manually light the fuse.
The grenade was shot out in one go.
The muzzle velocity of the grenade is obviously not too high, because it is visible to the naked eye.
If it is a copper cannon, the speed of the spherical solid projectile exceeds the speed of sound and is completely invisible to the naked eye.
The grenade was not stable in the wind and swayed a bit.
Today there is a level 3 cross wind, which is another problem with this weapon. It is easily affected by meteorological interference, resulting in a decrease in accuracy.
If there is a little bit of wind, or under complex weather conditions, it will be difficult to hit accurately.
Although there is a tail boom with stabilizing wings behind the grenade, the actual effect is not ideal.
The grenade flew precariously over the top of the parabola and then began to fall.
Under the acceleration of gravity, head towards the target area.
Finally, it landed in a large circle with a diameter of fifteen meters, drawn with white gray lines.
The grenade hit the ground without exploding.
There are a lot of rocks on the ground here, and the complicated ground conditions caused the fuse to malfunction.
Yang Fan didn't seem to notice Chang Zhu's embarrassed expression and counted softly, one, two, three.
There was a loud bang, and the time message came into effect.
With the same power of three hundred grams of TNT, this one kilogram warhead exploded into an orange-red fireball. In some gloomy weather, it is very dazzling.
The steel slag, steel balls and iron shell wrapped around it exploded instantly and scattered in all directions. The wooden piles and scarecrows erected around them were in a mess under the impact of dense prefabricated shrapnel. Broken and shattered one after another.
The reference objects placed around mark the distance. Can clearly see the effect.
"The killing radius is fifteen meters. Okay, everyone who participated in the trial production has made a meritorious service and will be given a bonus of one hundred silver coins each." Yang Fan said excitedly.
With these two artifacts, let alone the prairie, Liaodong Yang Fan dared to take a group of servants to explore.
