The cheering crowd soon discovered that the boat was floating straight on the water, dumbfounded and motionless.

It was only at this time that the more amateur fellows discovered that the boat had no oars, and of course it was impossible for a boat without oars to move, even if it was enlarged to normal proportions, it would be equally impossible to move, because no one could push it.

Facing increasingly strange eyes, Li Chengqian beckoned to a woman in palace clothes in her thirties behind him: "Tian Zhangsu, come here." ”

"What does Your Highness command?"

Palm seam, the prince of the East Palace, there should have been three people, but Li Chengqian was too lazy, and he didn't choose another after choosing one.

"You watch from the side first, and then you need to sew a few pieces of cloth on the mast of that ship." Li Chengqian motioned to Tian Zhangsui to wait for a while, and then asked the two guards to bring the boat up, pointed to the top positions and said: "Here, here, here, you look at the size ......of the cloth, in short, cut out these shapes, and then sew them on."

"Whoa!" Tian Zhangsui agreed, and then turned around and left the carriage where he came, preparing the fabric.

Li Chengqian's requirements are very simple, just a few pieces of fabric with special shapes, and it is not very laborious to cut them out, and he doesn't even need to measure them.

Compared to clothes, those few pieces of cloth are simply not too simple.

Li Chengqian took advantage of the time when Tian Zhangsui left to chat with Liu Min about gears, chains and bearings, ignoring the increasingly strange eyes around him.

However, Liu Min is not as ignorant as others, although he doesn't know why the boat designed by Li Chengqian can't move forward in the water, he is still full of confidence, but the question raised by Li Chengqian made him take his thoughts away from the boat in an instant, and turned in another direction: "Your Royal Highness the Prince, you said that the bearings should be installed on those cylinder cars?!" ”

"What do you think?" Li Chengqian asked.

"Your Highness, the minister now knows the role of bearings, but it seems that the bearings are not suitable for installing on the cylinder car." Based on the instinct of a craftsman, Liu Min felt that Li Chengqian's idea was very unreliable.

After thinking about it, he said slowly: "Your Highness, if you put the cylinder car on the bearing, don't you think it will spin too fast?" And if the speed is very uncontrollable. ”

"Speed?" Li Chengqian pondered for a while, and found that it seemed that he really thought things simple.

Originally, I thought that if the rotation speed of the cylinder car was increased, the hydraulic press could be driven at a faster speed, and the faster the speed, the work efficiency of stamping could be improved.

But now that Liu Min says this, it seems that he is poking at the weakness of this set of equipment.

Many people know that there is a limit to the force that a material can withstand, and the same is true for the hydraulic press that is being used today. While increasing the speed of the cylinder car, the speed of the middle shaft will inevitably increase, but the 50,000 catties of iron in the other direction have not changed.

As we all know, the faster an object of the same mass moves, the greater the force it will experience. If the frequency of hammering up and down 50,000 catties of iron is ten times per minute, then if you want to double its speed, then you have to exert double the force on it.

In this way, it is very likely to cause another situation, that is, the torsion resistance of the upper axle of the cylinder car does not meet the requirements, and cannot meet the requirements of double torque, resulting in deformation and other consequences.

Thinking of this, Li Chengqian sighed, and the idea of using a chain instead of a cow tendon leather cord also faded.

It seems that the wisdom of the ancients should not be underestimated, although they did not necessarily know many of the principles, but they could make many correct judgments through past experience.

This made Li Chengqian think about his father in the future.

It was winter, and he and the old man were assembling a shelf, and because the shelf was high, they had to use one hand to fix their bodies, so they had to work with one hand free.

The shelves are bolted in place, but twisting the bolts with one hand is a laborious thing that anyone with any experience knows.

Just as his own bolt was spinning, and he was even grumbling because it took a lot of trouble to get the bolt into the hole, he found that his old man had done the job in a disgusting way.

The way to accomplish this job is actually very simple, the old man just spits on the bolt and then threads it into the screw hole, and in the cold winter, the saliva will soon freeze, and then freeze one end of the bolt with the iron.

Then the old man would calmly twist his nut to it.

Simple water, under certain conditions, can be turned into glue, this is simply the best idea used by an old man who has not read a book for a few days in his life.

This method is very simple, and people who have gone to school can understand the principle at a glance, but relying only on imagination, Li Chengqian believes that even with his current ability, it is estimated that he still can't think of it.

It's a combination of experience and wisdom, and it's not something that can be compensated for by being smart.

"Your Highness, Tian Zhangsui is back!" Just when Li Chengqian was in a daze, Yang Yuxin reminded on the side.

"Oh!" Li Chengqian shook his head, threw out the messy thoughts, made some gestures to Liu Min that he would say later, and turned to Tian Zhangxi: "You start, don't make it too strong, this will need to be changed often in the future, so as long as it doesn't fall off." ”

The craftsmen who can enter the palace to work have their own unique craftsmanship, and the same is true for Tian Zhangse.

Therefore, Li Chengqian thought that the work needed to be carried out for an hour or so, and it was over in her hands in less than a cup of tea, and the handwork was surprisingly beautiful.

Pieces of white silk cloth are delicately sewn on the mast of the wooden ship, the foresail, the main sail, and the sail are each so beautiful, and the ship model that still maintains the true color of the wood has also completely changed its appearance under the decoration of the silk cloth.

Refined and beautiful are not enough to describe this model, although it came from the ancient craftsmen, but no matter how Li Chengqian looks at it, this model is not inferior to those well-crafted ship models of later generations.

Once again, the guards carefully lowered the silk model into the water, and the moment they let go of the rope, the change in the model caused everyone to let out a sigh of surprise.

"Moved, moved, really moved." The old shipwright had a ghostly look on his face.

The boat was indeed moving, and in the gentle breeze, the model that had been parked on the surface of the water was actually moving slowly with the direction of the wind, and the speed was getting faster and faster.

Subversion, this is a complete subversion, the culet boat can really be unsinkable on the water, and it can indeed sail on the water without oars, which is simply a miracle.

(End of chapter)