Since it is an empirical formula, it must be wrong, and Li Hui asked to be as concise as possible, this error is naturally greater, but in reality, the number of shell hits required to cripple a warship has a large fluctuation, as long as the general law can be summarized, it should have a lot of reference value, "It seems to be proportional to the power of a single shot to the 3/2 power, which is amazing!" After replacing it with silver explosives, the explosive power of the shell is not 4 times that of the original (the ultimate power of military black powder explosion in an absolutely enclosed space can reach 45% of TNT, but it is difficult to have such a high level in reality, generally between three and four percent, Li Hui here uses a power coefficient of 0.35 as the calculation benchmark). ), but 8 times, this is too much of an increase."

This result made Li Hui's mouth open in surprise, and when he compared the explosion power of the imaginary 305mm blasting bomb after switching to silver explosives with the two main shells of the Japanese Navy, the mouth suddenly opened so wide that even a goose egg could be put in, "Even if it is a picric acid shell, the power of a 6-inch blasting shell is only equivalent to less than 1/27 of a 305mm silver explosive explosive projectile, and the 120mm caliber blasting shell is only about 1/77. The amount of ammunition projected has become meaningless, in fact, the devil didn't have many picric acid shells available in the Sino-Japanese War, most of them were still filled with black powder, and the difference in explosion power was even more exaggerated, they were 143 times and close to 400 times, well, the gap was so big that there was no need for accurate numbers, it didn't matter if it was infinite."

"Even the Yoshino, which has the most firepower in the Japanese Navy, can only fire at the same target with a maximum of 3 152mm rapid-fire guns and 4 120mm rapid-fire guns, the former has the fastest rate of fire in actual combat of 4 rounds per minute, and the latter is 7 rounds per minute, and can fire up to 48 152-mm shells and 112 120-mm shells in 4 minutes. If it is all picric acid charge, it is only slightly stronger than Dingzhen, which can only use one side of the main gun (the fastest rate of fire of Dingzhen's 305mm main gun in actual combat is 1 round in 4 minutes, and the power of two main guns on one side and two blasting shells with silver explosives is equivalent to 55 rounds of 152mm picric acid blasting shells). And if black powder is used, all the firepower of a tour is not as good as the firepower of any unilateral main gun in Dingzhen", Li Hui is now fully aware of the significance of his invention, and understands how wrongfully the Beiyang Navy Division lost in history, "In fact, even if black powder is still used, the power of the 305 mm steel-shelled blasting bomb is also very amazing, although the total firepower output is not as good as the devil, but considering the advantage of the defense of the second ship in Dingzhen, Dadonggou may not have no chance of winning." Historically, it may be that the Japanese army was not trained enough, or it may be that the Japanese army did not use smokeless propellant kits (there are sources that say so, and I personally doubt it.) In short, the advantage of the Japanese Navy's rapid-fire guns in the Battle of Daidonggou was far less than the artillery parameters showed, and if calculated by the whole time, the average rate of fire per minute of each naval gun on the Yoshino was only 0.3 rounds, which was less than three times that of the main gun in Dingzhen. It is a pity that in history, the Beiyang Navy Division was equipped with very few imported large-charge blasting bombs, and most of the others were solid bombs that could not explode at all, or they were iron-shelled flowering bombs with a charge of only one-half of the imported steel-shelled blasting bombs, and more than two-thirds of them could not explode (although some of them were positioned as blasting bombs, Li Hui felt that calling them blasting bombs was an insult to blasting bombs). After calculating the firepower, it is strange to win! Deng Shichang: They are really blind! ”

Although he was so excited by this surprising conclusion that he stayed up all night, Li Hui did not tell the good news to the generals of the Beiyang Naval Division, on the one hand, because the source of this empirical formula could not be made public, and on the other hand, there were many foreigners in the Beiyang Naval Division, and there was a great possibility of leakage.

Li Hui knew very well that Japan in history did not exert all its strength in the First Sino-Japanese War, and if he knew this empirical formula, he would definitely be desperately trying to strengthen the navy like crazy. Li Hui even suspected that the news of a large number of demolition bombs in the future Beiyang Navy Division was likely to cause the Japanese Navy's strength to exceed that of the same period in history

As a matter of fact, even if the empirical formula summed up by Li Hui is not disseminated, the four-fold explosion power calculated directly according to the proportional relationship is enough to make the officers and men of the Beiyang Navy who know about it full of confidence.

Although he is a naval expert, he also knows that he will not be able to help the Beiyang Naval Division increase even twice the combat effectiveness of the Beiyang Naval Division no matter what, and a seemingly simple invention can make the firepower of the Beiyang Fleet increase to four times that of the previous one, which makes Yan Fu, a person who has studied both China and the West, more and more deeply realize the power of science and technology, and the wise saying "science and technology is the primary productive force" after a hundred years has also spread rapidly in China with Yan Fu's vigorous publicity, almost the same as "science" This concept is in no particular order.

On May 16 of this year, Li Hui finally completed the research of all the main technologies and qualified sub-technologies in the second line of the system science and technology tree, and in less than half a year, he had reached the scientific and technological level of Europe in the late seventies and early eighties of the nineteenth century (although only military-related aspects were included). ）。

However, the third line of system technology is not so easy to study, and the time required and precious metals are far from comparable, so Li Hui can only give up the previous practice of comprehensive rollout, and give priority to the research of high-value, especially those that can be used soon.

Although the "blasting bomb" technology is a sub-technology of the second line, it has not yet begun to be studied, because one of its prerequisites is the third-level main technology of the industrial branch of mining and metallurgy, "low-cost steel smelting", which has thus become the first third-level system technology researched by Li Hui. Although it is the main technology of the third line, the scientific research difficulty has reached 3, but the scientific research age of "low-cost steel smelting" is unusually high, it is actually only 1860, so the time and silver required are not much; And it's just a second-level technology, not to mention a "blasting bomb" of a sub-technology

As a result, it took only 3.09 kilograms of silver and 14 days to study these two technologies, but the next major technology of mining and metallurgy, "Advanced Metallurgy", which is the fourth level of mining and metallurgy (after the completion of this scientific and technological research, the system can produce aluminum powder. But Li Hui immediately felt the difficulty of studying system technology