"Understood, then do you know, what is wrong with this steam car you built?"

Hearing this, Ying Changsheng looked at Gong Yi Shangzao, and then asked him.

At this time, Gong Chuan Shangzao's face changed slightly, and he looked carefully at the steam car he had built, although it was a failed product, but he could learn some experience from it, only to see it, and after staring at it for a long time.

He said, pointing to the wheels under the car.

"There are too many wheels in this car!"

"Obviously, four wheels can make it walk, but the minister is on top and has six wheels on it!"

"With more wheels, there will be more resistance!"

"Uh, who told you this?"

Ying Changsheng's face changed slightly, and he said with some embarrassment.

He said.

"Six wheels, put there, the weight of this steam car, pressed on the six wheels, the resistance generated, is about the same as the resistance he pressed on the four wheels, the resistance!"

"It's like if you push this little wooden cart and walk on the ground, the more force you press, the harder it will be to push, it has nothing to do with how many wheels he has!"

"This ......"

Hearing this, Gong Lose's face turned red and a little embarrassed, he continued to scan the steam car in front of him, and then, he pointed to the ground and said.

"Didn't the nineteenth prince say that all this is because the road surface of this steam car made by the minister is too rough, so the resistance increases?"

"Not bad!"

Ying Changsheng nodded.

Immediately, he pointed to the wheel of the steam car.

"Not only the road surface, but also the surface of the wheels is too rough......

"But, but ......"

Hearing this, Gong Yi Shangzao glanced around.

Then, a little embarrassed said to Ying Changsheng.

"Nineteen sons, having said that, the problem is that how difficult is it to build a road as smooth as glass?"

"How high is the cost?"

"Yes, Nineteen Sons, this is too difficult!"

Hearing this, the craftsmen on the side bowed their heads and said.

Build a dirt road to connect the upper and lower parts of Daqin, which is the so-called Qin Straight Road.

It has already exhausted the strength of Daqin.

If, according to what Ying Changsheng said, build an extremely smooth road, wouldn't that be a fool's dream?

Seeing that everyone thought so, Ying Changsheng said with a smile.

"Who said to build such a road?"

"Didn't I just say, resistance, resistance, resistance, important things, say it three times, didn't everyone understand?"

"How does resistance come about?"

"It's because of friction, the public is on the building, look at it, this steam car!"

As he spoke, Ying Changsheng pointed to the four steam cars, and then pointed to the wheels, the part that connects with the wheels, where the wheels are directly inserted into the axles, and there are no connecting objects in them.

I saw that Win Changsheng said to the public.

"Look, if you put on a bearing, wouldn't it be possible to reduce some friction?"

"What is a bearing?"

Hearing this, Gong Lose was confused, well, this thing has never heard of this thing.

Hearing this, Ying Changsheng was stunned for a moment, and then reacted.

Yes, the efficiency of this steam engine is so low, and it is inseparable from the lack of bearings.

You know, bearings are a good thing.

It can reduce the friction generated by the mechanism and gear rotation, which can greatly improve the efficiency of the machinery.

Thinking of this, Ying Changsheng slapped his thigh violently, secretly scolding himself for being stupid, and only then did he think of this thing.

He smiled slightly awkwardly, and then said.

"Bearing, it's a kind of machinery that can reduce friction and reduce resistance, what Ben Gongzi just thought of, go back and let people make it!"

"yes, let's hurry up and make it!"

Hearing this, Gong Yishangzao's eyes suddenly lit up, and he said to Win Changsheng.

Win Changsheng said.

"This matter is not in a hurry, you just said the road, I will tell you now, why do we want to build the road?"

"We can replace the road with two, smooth railroad tracks!"

"Rails?"

The moment he heard what Ying Changsheng said.

Gong Yishangzao's face changed slightly, and he didn't react.

And Win Changsheng said to him.

"The surface of the iron bar is much smoother than the road, right?"

"If you let this car drive along this smooth railroad track, wouldn't it mean that it can reduce a lot of friction and improve a lot of efficiency?"

"Besides, it's much easier to build a railroad track than to build a road, a road that is extremely smooth, right?"

"What the nineteenth prince said, there is some truth!"

Gong Yi Shangzao nodded, he frowned and said.

"It's just that this rail consumes more iron?"

Well, Gong Yi Shangzao thought of the consumption of iron when making rails, but all this was not a problem in Win Changsheng's opinion.

Well, iron?

What kind of thing is this?

Nowadays, Daqin's steel production is increasing steadily, and there is no longer a shortage of such a little iron.

It can be said that the current Great Qin Empire can easily produce countless railroad tracks without any effort at all!

"Iron this thing, I'm afraid he won't have enough? It's a big deal, it's just a matter of adding a few more workshops! ”

Win Changsheng said to the public loss in front of him.

"That's right!"

Gong Yi Shangzao pondered carefully, and it was really true, he said.

"But, Nineteen Princes, how can you turn on this railroad track?"

"That's what I said earlier, how to solve the steering problem!"

Hearing this, Ying Changsheng laughed loudly and asked the prince.

"The car itself is not driving on the road, but on two railroad tracks that have been prepared in advance, in such a situation, where is the need for a steering device?"

"How the rails are laid, just walk them!"

"This, this ......"

Hearing this, Gong Yi Shangzao was slightly stunned, and some did not react, but immediately, his eyes lit up, and in an instant, as if he saw the sun through the clouds, his mind suddenly opened, and he said to Ying Changsheng on the side.

"The nineteenth prince is simply a god, how could the minister not have thought that there would be such a way!"

Saying that, Gong Lose Shangzao looked at Win Changsheng and said.

"But, Nineteen Princes, how is the bearing you mentioned before made?"

"Well...... this"

Hearing this, Win Changsheng thought a little, and then made a statement about the loss of the public.

"The track I just envisioned, the locomotive running on it, in my opinion, the locomotive is only responsible for providing traction!"

"It's like an ox pulling a cart, only responsible for pulling the cart, not for carrying the goods!"

"Do you understand?"

"The minister understands, the car running on the railroad tracks is only responsible for providing power, and in the back, if you want to pull the goods, you can hang the car box in the back, what the minister said, there is no problem, right?"