"Is there another way to increase speed? Big brother, say it quickly! Qi Niang couldn't help but hug Li Xiu's arm excitedly when she heard Li Xiu's words, and her little face was full of ecstasy.

"Don't be too happy, although my method can greatly increase the speed of the voyage, and even when you go to sea in the future, you don't need to consider the impact of ocean currents and monsoons on the ship, it can be said that it will be a subversive reform for the current navigation, but it is by no means so easy to achieve!" Li Xiu was so happy to see Qi Niang, which also made him feel relaxed for a while, but when it came to the end, the look on his face became very serious.

"Is it that powerful?" Although Qi Niang believed that Li Xiu would not lie to herself, she still asked with some suspicion when she heard Li Xiu's words, after all, she couldn't imagine anything that could subvert the current navigation industry?

"It's so powerful, in fact, you should also be able to find that no matter how you design it now, all sea ships rely on the wind to move forward, of course, there are also oars, but most of them are inland river navigation, and they can't be used for long-distance ocean voyages, but my second way is to let the ships get rid of the dependence on the wind!" Li Xiu said confidently.

"Impossible, what other force can drive such a large ship than the wind?" Qi Niang heard Li Xiu's words but immediately shouted, she has been designing ships for a lot of years, but as long as it is a sea ship, the first thing is to consider the design and layout of the sails, and she has never heard of a sea ship that does not rely on wind power.

"Qi Niang, you are indeed a first-class master of the Tang Dynasty in terms of shipbuilding, but it is precisely because of this that your thinking is restricted, but it is not as dare to think and do as a layman like me!" Li Xiu denied his words when he saw Qi Niang being so arbitrary, and he was a little unhappy at the moment, after all, Qi Niang was a student he taught, and such a stubborn performance was not an attitude towards learning.

"I admit that what you said makes sense, big brother, but how can a sea ship sail on the sea if it doesn't make wind power, does it only create ocean currents or manpower?" Qi Niang was still a little unconvinced at this time, she really didn't believe that there was any ship that didn't make wind power to sail.

"Not ocean currents or manpower, of course, but by the power of machinery!" Li Xiu said with a smile at this time.

"The power of machinery? What is that? Qi Niang heard this, but she was a little unclear.

"Where have you learned the physics I taught you, machinery is a tool device that can help people reduce the difficulty of work or save effort, and the machine I am talking about, called the steam engine, is simply to use steam to drive the machine, and then use the power of the machine to drive the ship, of course, the steam engine can not only be used on ships, but also for vehicles and other tools!" Li Xiu first clicked on Qi Niang's brain, and then explained.

"Steam engines? This name is so familiar, big brother, have you ever told us before? When Qi Niang heard the name of the steam engine, she also asked with some confusion.

"That's right, when I used to teach you physics, I talked about the conversion of several kinds of energy, and I mentioned the steam engine at that time, and the principle of this kind of thing is also very simple, that is, to heat water with fire, and then let the water turn into water vapor, which causes the volume to expand, and then use the power of water vapor to drive machinery, so as to convert heat energy into mechanical energy!" Li Xiu saw that Qi Niang still remembered the name of the steam engine, and he was very relieved at the moment, when he first talked about physics, he only mentioned a few words in passing, and did not explain in depth.

"Does water vapor really have that much energy to move a huge ship into action?" Qi Niang is not only Li Xiu's sister, but also one of Li Xiu's best students, so she can naturally understand the principle of the steam engine at this time, but she is still a little skeptical about the energy generated by steam.

"Of course, in fact, if you put some water into a closed iron ball, and then put the iron ball on the fire to roast, the steam generated in the end will burst the iron ball, and the power is no worse than gunpowder, so as long as it is used properly, the water vapor can completely generate the energy to drive the giant ship!" Li Xiu nodded with great certainty.

Qi Niang is still her own student, but even she can't help but have some doubts about the steam engine, let alone ordinary people, so the person who can think of using steam energy in history is definitely a genius, of course, Watt is not the first person to invent the steam engine, but he is the person who improved the steam engine to make the steam engine more practical, and it was his improvement that opened the first industrial revolution, so he is also very great.

"Since the steam engine can produce such a huge amount of energy, its process must be very complicated, can we build it?" Qi Niang is worthy of being Li Xiu's student, and she has experience in designing ships, so she also asked the key at this time, after all, if the steam engine was easy to manufacture, I am afraid that Li Xiu should have made it a long time ago.

"With the current technology, it is indeed difficult to make a steam engine, but its principle is still very simple, and as long as a prototype can be made, it can be slowly improved, and one day it can be applied to practice!" Li Xiu nodded first, and then said encouragingly.

"Really?" Qi Niang still asked a little unconfidently.

"Of course you can, and I can also help, and there are also Jin'er and them, I believe that as long as you gather the wisdom of everyone, one day you can make a steam engine!" Li Xiu said confidently at this time.

Hearing that Li Xiu was also willing to help herself, this made Qi Niang finally have some confidence, and nodded solemnly at the moment and said: "Okay, then I will go both ways, first start with the most familiar design boat, design the multihull ship you said, and then start to design and manufacture the steam engine, and then see which plan is better!" ”

"Haha~, this is my good sister!" Li Xiu saw that Qi Niang finally cheered up, and he also laughed out loud at the moment. However, at this time, Li Xiu found that the night was already late, and now it was the second half of the night, so he comforted Qi Niang a few words, and then persuaded her to rest early.

Qi Niang had the two solutions given by Li Xiu, and her mood was much better, and she was very obedient at the moment and went back to sleep first, Li Xiu watched Qi Niang return to the bedroom, and then left Qi Niang's yard, but when he walked out of the courtyard gate, he couldn't help but stop, turned his head to look at Qi Niang's room, and then let out a long sigh.

In fact, Li Xiu didn't really want Qi Niang to make any multihull ships or steam engines, but he just used this method to cheer up Qi Niang and forget the distress in his heart for the time being, but now Qi Niang has indeed reached the age of marriage, which makes Li Xiu very entangled in his heart, I don't know if I should agree to the matter between her and Li Chengdao?