Is the wisdom of the working people infinite, or is it that an old craftsman solved the problem?????? w?w                                                                                                               �

?b?i?q?u       He used a thin rope as a core, then twisted five leads around the core rope, wrapped them tightly with oil paper and wrapped them with hemp rope. After the test, neither the strong wind nor the infiltration into the water could be extinguished. Zhao Bing was overjoyed and praised the craftsmen who participated in the test. The successful development of the fuse not only solved the problem of the shell, but also solved the problem of the rocket being silent after falling into the water.

Although it was already dark at this time, Zhao Bing had no intention of leaving. Zhou Xiang could only prepare food for His Highness and set a room for His Highness to rest for a while. He now didn't care what to eat, wherever he rested, and his mind was still thinking about the fuse. This thing not only had the function of igniting explosives, but also had a timing function. Therefore, it was necessary to ensure that the combustion time was the same, and only in this way could the shell explosion not be advanced or lagged. He thought that it would be difficult to ensure uniformity by hand operation, and only mechanical can do it.

Zhao Bing spent the whole night lighting the lamp and did not sleep. He drew a set of drawings and immediately asked someone to take it to trial. The newly cast shells there had been prepared overnight. He ate something quickly and immediately rushed to the test site, chose a smallest one, and watched the craftsmen weigh the medicine and fill it into the shells. After the fuse was installed and weighed again, he lit up and threw it into the wooden house made of thick wooden boards.

"One, two, three, four, five..." Zhao Bing lay behind the pile of sand and counted the time counting silently. Before he could even make a sound, he felt that the time had frozen in an instant. He wanted to look up, but Ni Liang held it tightly.

'boom……'

"Go and have a look!" After the muffled sound, Zhao Bing broke away from Ni Liang's arm and jumped up and shouted, only to see that the closed wooden house had been lifted off, shaking and waving, smoke was emitting.

"Ph, ph..." Zhao Bing, who was rushing in front, opened the door and was thrown into the face of sand.

"Your Highness, let's do it!" The craftsmen smiled as they looked at His Highness dancing with both hands. Everyone thought that if His Highness was not young, they would only look at him as if he was more like his colleagues when he was working.

"Look carefully, and you should also pick the wooden boards off to see how many pieces are broken, and don't miss them!" Zhao Bing thought about it and stopped causing trouble, and retreated two steps.

"Yes, Your Highness!" Several craftsmen said, and when the smoke of gunpowder completely disappeared, they carefully collected the scattered shrapnel.

"It's much better than in the past, right?" Zhao Bing counted the shrapnel collected twice, the largest ones were four or five, the size of a fingernail was more than thirty, and the size of a bean was more than ten, which should be quite satisfied.

"It's done, Your Highness, some of these fragments are embedded in the wooden board more than half an inch. If they hit someone, they will be seriously injured even if they don't die." A craftsman nodded vigorously.

"I just loaded with 4 liang of medicine. How about we change the bigger one this time?" Zhao Bing asked with his lips twisted and turned his face.

"Well, listen to your highness." Several people nodded. They were actually curious to see how powerful it was.

The people here weighed, loaded medicine, installed fuses, and prepared for a second trial blowout. Someone there repaired the wooden house. Zhao Bing ordered the fuse to lengthen and moved the hidden place back thirty steps before he could order someone to ignite the fire again after everything was finished.

‘Boom!’ This time the charge was two and a half pounds, and the power would be even greater. Zhao Bing asked everyone to lie on the ground and no one could move, so as not to be injured by the scattered shrapnel. Although it was quite far away, everyone felt like a thunder was blowing in their ears, and their heads were like a gust of wind blew over their heads, and their bodies were shocked. After a while, everyone got up and looked in the direction of the wooden house. There was already chaos over there, covered in smoke and dust.

"Oh, even the gods may have been killed!" After the smoke and dust dissipated, I saw clearly that the wooden house that was pieced together in half a piece of wood should be scattered aside in a split second, and I could see what it was like. Ni Liang opened his mouth wide and said in surprise.

"If someone is inside, you will really be crushed to pieces!" The craftsman next to him also sighed.

"Look!" Zhao Bing waved his hand and led everyone over to check carefully. A crater nearly two feet deep was blown out at the explosion point. Thick shrapnel were found within three feet of the surrounding area. The wooden boards were basically broken into several pieces, and there were also many shrapnel embedded in it. The largest shrapnel found was the top of the shell, which was the heaviest part of the shell.

After the verification was completed, Zhao Bing breathed a sigh of relief. The explosion power and shrapnel lethality of the shells had exceeded his expectations. The following depends on the test firing of the crossbow. Although he had considered the balance at the beginning of the design, if the shells rolled in flight or the ballistic was unstable, it would still not be considered successful. The wooden house could no longer be used, so he asked someone to raise a wooden wall as a target and select three of the remaining shell shells to fill with gunpowder according to their weight, but there was no need to install a fuse.

Sure enough, Zhao Bing unfortunately predicted that the stability of the shell was very poor. Although it did not roll, the ballistic was unstable. It often did not hit the ground with a bullet, but was horizontal and vertical. It was difficult to penetrate the thick gangway board, and the hit rate was not as good as the spherical bullet in the past. He could only readjust the elastic shape again, change the counterweight, and conduct repeated tests. The failures again and again forced him to give up, but he still changed back to the spherical bullet.

Zhao Bing knew his failure, one was because of his design problems; the other was that he had to consider the complexity of the process and the manufacturing cost, and did not install a tail wing on the shell. After several trade-offs, he could only sacrifice some power, and still used spherical bullets with simple manufacturing technology, easy quality control, and low cost, but after marking, the fragmentation rate was still guaranteed, basically stable at about 40 pieces. After multiple tests and comprehensive considerations, only three types of bullets, five and ten kilograms were retained, and half a kilogram, one and two kilograms were charged respectively.

The last item was live ammunition target shooting. Zhao Bing asked someone to find two medium-sized warships that had no use value as targets, and invited the main officials and officers above the commander to visit. He personally served as the commander. He first used medium-sized and heavy crossbows to test the penetration power without gunpowder and air shell ammunition. This test has been carried out many times. If the shooting angle is correct, it can basically penetrate the four-layer gangway plate. The success rate of this shooting has also reached 60%.
Chapter completed!