After many attempts, Yuan Fang found that as long as it is not a closed environment, gunpowder will not explode even if it is ignited, which is a new discovery, at least for Yuan Fang, and regardless of the thickness of the container and the amount of gunpowder, as long as the burning speed of the compacted gunpowder is basically the same, invisibly, it solves the problem of non-standard uniformity of the container, in other words, the burning speed of this gunpowder stick does not depend on the amount of gunpowder, but depends on the length of the gunpowder stick.

Before dinner, the sound of artillery on Changhuan Island gradually stopped, and Guan Xiaoyun and Ye Qingru came back one after another and handed over today's statistical results to Yuan Fang for review. Yuan Fang put down the work at hand, one by one carefully looked through, the test of the fighter, because the pilot is more familiar with the performance of the fighter, compared with yesterday is also more skilled, there should be no big problem in operation, of course, this is just a basic override and safety assessment, if you want to fully play the performance of the fighter, it will take a longer time to train and run-in.

After a full day of testing, the results were also very encouraging, the range was very stable, the mechanical fatigue was also very good, as long as the temperature of the gun body was not too high, it could be fired continuously, according to the records, a gun could be fired continuously for almost two hours or more, at least fifty shells, and then it could be used as long as it was taken a short break or cooled down with water.

The selection of artillery is somewhat unsatisfactory, and everyone is still very afraid of this kind of thing with a loud sound, especially in terms of accuracy, which is not very objective, and the best hit rate is about 50 percent, and the worst is less than 10 percent, which is barely satisfactory, and this is still a target ship about the same size as an airship, and it is also a fixed target, and if it moves, I don't know how miserable it will be.

Yuan Fang was not disappointed, after all, it is a new thing, everyone needs to adapt, as long as they continue to practice, they will always get better, sharpshooters are not born, and that is also the result of countless bullets being fed.

However, it is not a way to consume it like this, it is impossible to fish out the shell if it falls into the sea, even if a shell weighs five catties, a cannon can shoot two hundred rounds a day, then it needs a meal of pig iron, fifteen artillery pieces are fifteen tons, such a consumption can not bear even if the Dongsheng Empire has a thick foundation.

For this reason, Yuan Fang decided to change the next test to a ground target, so that the shells shot out can be reused with a little polishing, and if the deformation is serious, they can also be poured back into the furnace from the new, which greatly reduces the cost of consumption. After having dinner in the studio, Yuan Fang showed everyone the results of today's and Hongyi's work, and then continued the next step of research.

The next research direction is the toughness of the fuse, which cannot meet the requirements of straw sticks, glass tubes or oiled paper, so Yuan Fang thought of fabric, that is, cloth, which has excellent toughness, and already, will not leave too many residues.

Yuan Fang thought so, if it is just artillery, it is no problem to change to a fuse without toughness such as a straw stick or wooden stick, but it is not okay for others, such as a bomb, if such a fuse is also used, when the fuse has not burned into the inside of the bomb after the bomb lands, it is easy to break due to the impact or distance vibration, resulting in the bomb cannot explode, but if there is a certain toughness, this situation can be avoided.

I didn't sleep all night, and the next morning Yuan Fang walked out of the stone house with red eyes, and stretched a big lazy waist facing the rising sun, although his face was full of equipment, but he had a triumphant smile on his face.

That's right, the problem was basically solved, Yuan Fang used the theory of red clothes to combine with the previous way, first threaded a silk thread into the glass tube, and then used a very flammable glue to mix the gunpowder mixed in and compacted, basically shaped and then taken out, and then used ciphertext silk to glue a thin layer on the outside.

The glue used by Yuan Fang is very special, even if it is exposed to the scorching sun, it will retain most of the water for a period of time, this water is not real water, but a kind of liquid that is still a liquid, Yuan Fang has tried, the toughness of the gunpowder stick mixed with this glue and gunpowder is quite excellent, just like the wicker in summer, it can be bent and rolled into a disc, and the most important thing is that it will not affect the combustion of gunpowder, and the glue in it also has the effect of combustion, and it will not burn independently, It will not cause the fuse to burn faster because of its existence, and it will continue to burn even if it falls into the water, this discovery made Yuan Fang's spirit greatly lifted, before he was also hesitant that when the air force bombed sea targets, the explosion time of the bomb was not well controlled, and if it fell into the water, it would not explode, and there was also the problem that the rain would soak the fuse of the artillery on rainy days, and now with this thing, all the problems are solved.

The new type of fuse was successfully developed, and Yuan Fang handed over the work of artillery testing and selection of artillery to Situ Muran, of course, Yuan Fang also asked Tian Erniu to find a special person to be responsible for the distribution and supervision of gunpowder. The sound of artillery sounded again, representing the beginning of a new day, this time the target of the artillery attack was changed to a target on the ground, for this reason, Situ Muran almost vacated half of the long roundabout, and transferred all the soldiers on the island to the other side of the island.

With the continuous sound of cannons, Yuan Fang and Tian Erniu and hundreds of female soldiers worked together to make the fuse according to Yuan Fang's instructions and requirements, and the raw materials were not very many, especially the magical glue and silk with dense and thin texture like cicada wings, so Yuan Fang sent Guan Xiaoyun and the impatient red-clothed airship to Xizhou to purchase, both of which were products of the Xizhou Military Factory.

There are also ready-made glassmakers on the island, and they made a lot of glass tubes with thicker outer walls according to Yuan Fang's requirements, and the inner diameter of the glass tubes is different, which is divided into two kinds, one is thicker, which is the fuse used by artillery, and the other is thinner, which Yuan Fang prepared for the bomb. When the glazier was making the glass tube, Yuan Fang took several bombs into the air on an airship, first using stone bombs of the same weight and similar shape at different heights to do several bomb throwing experiments, roughly calculated the speed and time of the bomb falling, and then inserted a fuse with a fuse of about the same burning time to carry out live ammunition experiments.

The result is quite good, the fuse burns very stably, the error in the standard time is almost negligible, the bombs that are dropped are basically exploded soon after reaching the ground, this is no wonder the fuse or the bomb itself, but Yuan Fang's calculation is biased, which is also inevitable, saying that Yuan Fang has no ability to create a bump fuse, if there is that thing, there is no need to worry about the bomb's fuse is too long to cause the bomb to explode after landing, or the fuse is too short, and it will explode in the air before it lands.

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