Yang Wenli simplified the structure of the grenade, made it similar to the grenade, and simplified the safety bolt, it only stuck the pull ring, and the pull ring is a small part of the inlaid groove, so as to ensure that the pull ring can not move a single inch back and forth, left and right, up and down, if you don't pull out the safety bolt, even carry the pull ring is no problem.

The principle of the grenade is very simple, Wang Rucheng only looked at the construction diagram for a few minutes to understand, and with Yang Wenli's detailed explanation, there is no problem, he asked a few points, Yang Wenli did not mark the place clearly: "Great Commander, what kind of substance is this delayed fuse?" What is the flammable substance in the fire pipe? ”

"The delayed fuze is actually ordinary black powder, but the three substances in it are adjusted, the general material combustion needs air to participate, isolating the air, the combustion is unsustainable, but the gunpowder does not need air participation, because it has its own oxidant, the oxidant of black powder is potassium nitrate, we only need to adjust the content of potassium nitrate, we can affect the combustion rate, this is the principle of the delayed fuze.

The principle of flammable substances is similar, except that the content of potassium nitrate and sulfur is increased.

One thing you should pay special attention to here is the crushing and mixing of the three constituent substances of black powder.

The mill must be made of wood, no metal or stone parts, and gunpowder is a flammable and explosive substance, and the slightest spark can cause a fire or explosion.

Second, sulfur is strong adhesion and cannot be crushed alone, the correct way is to crush sulfur in equal proportions with potassium nitrate and charcoal respectively, and then mix the two to make the gunpowder we need, so that the gunpowder is mixed more evenly and can avoid the interruption of combustion.

The interruption of combustion is terrible, after all, we don't know if there will be another combustion explosion, which can easily cause casualties, so we must pay great attention to the full mixing of gunpowder, and do a lot of experiments to ensure that every fuse can burn evenly, and that every ignition tube can ignite.

In addition, the time of delay of the fuze, about five seconds, is the most suitable ......"

Yang Wenli blurted out some new terms as he spoke, and Wang Rucheng hurriedly interrupted him: "Wait, Grand Commander, how long is five seconds?" I have never heard of it. ”

"Five seconds is counting slowly, from one to five, I divide an hour into two hours, sixty cents per hour, sixty seconds per minute, you think for yourself, see how long five seconds is.

It doesn't have to be exactly right, as long as it's about the same, and each grenade burns at the same time. Yang Wenli explained to him in detail.

"Oh! The humble position generally understands that this time is the time when the soldiers tear off the pull ring, ignite the delayed fuse, and then throw it at the enemy, and then explode when they fall on the enemy group. Wang Rucheng nodded thoughtfully and said.

"That's right, that's basically what it means, but in fact, this time only takes three seconds, and I reserved two seconds for fear that the soldiers would forget to drop the bomb in a panic and explode in their hands.

If the soldiers are proficient, they should count the bombs in their hands for two seconds before throwing them, and they may explode above the enemy's head, which will be more lethal. Yang Wenli further explained.

"Oh! By the way, there is another very important thing, the grenade was actually invented as early as the Song Dynasty, the ancients, however, at that time, it was called the earth-shaking thunder and thunderbolt, which was huge in size and weighed more than 20 catties, which was not suitable for single throwing at all, only suitable for defending the city, or used on trebuchets.

The grenade I developed is suitable for one-handed holding and throwing, and it only weighs about three pounds, and the difference is in the explosives.

The explosive I designed is called double-base explosive, which is made of nitrocellulose and nitroglycerin pressed and dried, and the explosive power is large, and its explosive power is about eight times that of black powder, and can produce an effective explosion range of about seven to eight meters, which is similar to the power of the ancient earth-shaking thunder weighing more than 20 catties, and may be exceeded, because the grenade I designed also has a built-in steel ball inside, which can further enhance the lethality.

But...... This kind of double-base explosives is very dangerous to make, and must be gently pressed with sticks and planks, and the composition of the two substances must also be tested by yourself, how not to explode and so on.

In addition, the explosion power is not as big as possible, because it is a manual throw, the throwing distance is generally about forty or fifty meters, if the power of the grenade is too great, then the fragments or steel balls of the grenade are easy to cause casualties to our soldiers, which also requires you to experiment and adjust the formula.

In addition, after the charge of explosives, when the delayed fuse is placed, it should be sealed as tightly as possible with clay, and the power of the explosion comes from the seal, and as long as there is a trace of gap, the power of the explosion can be seriously reduced. ”

"Hmmm! Commander, the principle is basically understood, let's quickly try to make a grenade and try the power! Wang Rucheng was already eager to try.

"Huh! It's still early! There are some details that you haven't understood, but you just know that the surface can easily cause the experiment to fail, or severely weaken the explosive power of the grenade.

For example, the placement of the delay fuze, one end of the delay fuse, should be through to the most central position of the explosive, so as to ensure the fullest combustion of the explosive, so as to produce the greatest power, if you only just pass to the edge of the explosive, then it may make a small part of the explosive explode, it will explode the grenade, its power may only play a fraction of the whole, this point should be noted.

There is also the other end of the delay fuse, which should be slightly redundant, and when assembled, it is easy to insert the ignition tube.

Specific to our grenade, I canceled the ignition tube, replaced it with the cap body of the grenade, the inside of the cap body is hollow, one side is drilled, that is, the place where the pull rope enters, first put the pull rope, then connect the steel wire burr, and then install the pull ring and safety bolt, and then we fill the inside of the cover with a mixture of glass powder and flammable materials, and finally tighten the cover body, and the grenade is assembled. ”

"It's so complicated! It doesn't seem to be easy to use grenades! Wang Rucheng's head was big when he heard it, and he couldn't help but sigh.

"Huh! That's what a match! The grenade is the simplest weapon, and the various types of cannon shells in the future will be more complex and require large-scale mechanical manufacturing, such as the barrel, which must have a large forging hammer and precision forging, as well as the fuse of the shell, which is no longer a simple delay fuse, must be a trigger fuse with high precision, which is very complex. ”

Yang Wenli smiled and said fiercely, the military industry has always been the forefront of social science and technology, the outbreak of military science and technology caused by war, and then the civilian science and technology derived from military science and technology, the society is so progressive, and there are many, many problems in the future.

Next, Yang Wenli personally demonstrated how to use the tapping machine and the round wrench to manually turn the inner and outer wires of the car, because it is made of cast iron, so there is no need for mechanical power, and the wire can be turned manually.

He first polished the part of the wire, measured the accuracy with vernier calipers in place, and then started to wire cutting, so that after the car passed the wire, the male and female wires were tightly sealed, in fact, a lot of trouble was omitted in the follow-up, which was the standard procedure of industrial manufacturing in later generations, and he used it, which was his advantage as a reborn, without him, a simple grenade, and even invented during World War II.

…… To be continued