Looking at the excited Zhang Fei, Wang Xuan was really a little speechless, he didn't bother to pay attention to this guy who didn't stop, just silently watched the test effect of this horse-drawn iron car.

The test site was large enough, a lap down to 20 kilometers, enough time for the vehicle to accelerate, gradually, the horses ran faster and faster, looking at the speed, there was already a speed of about 30 miles.

This speed is already very fast, but obviously not yet reached the limit speed, but the front of the driver has begun to turn pale, after all, it is the first actual test, the four carriages are loaded with counterweight iron, in order to test the performance of various road conditions after the load, but if it rolls over at this speed...... The coachman felt that he was afraid that he would not be crushed into a meatloaf and die.

The front is okay, it is all straight line acceleration, the test is the speed, the back, there are different angles of curves, there are climbs, there are downhills, it is to test the ultimate performance, seeing that entering the first corner, the coachman tremblingly waved the whip to direct the direction of the horse, while gritting his teeth, for fear of overturning directly.

When cornering, the whole track is to have a certain angle of inclination, with the combined force of gravity and support force, it can also be said to be the component of the support force in the horizontal direction to ensure that the vehicle turns smoothly, if it is completely horizontal, then it is necessary to rely on the deformation of the rail to provide centripetal force, which is too dangerous, tantamount to derailment, so it should be slightly tilted.

Huh~~ The first small curve was successfully passed, the driver did not feel the feeling of the vehicle leaning, after the corner, he breathed a sigh of relief, followed by the first uphill, when going uphill, it was obvious that the vehicle was decelerating rapidly, fortunately, after the speed was reduced to a limit, the vehicle finally climbed up, the driver just breathed a sigh of relief, and suddenly felt that the speed of the vehicle increased sharply, and the speed of acceleration exceeded the normal limit.

"Ahh The coachman screamed, subconsciously began to pull the handbrake, the vehicle slammed, even the horses with the cart were neighing, the coachman then reacted that he was a little too aggressive, and quickly released the handbrake, and the vehicle accelerated again.

Slowly, the speed of the car has obviously exceeded the time when it had just accelerated in a straight line, but fortunately it has not reached the limit of the horse, and it is still within the tolerable range.

After entering a straight road safely, the driver breathed a sigh of relief, but he felt that the curve or ramp behind him was more dangerous than just now, and he suddenly felt like he was going to die.

Cornering, climbing, downhill...... It was safe to pass twice again, but by the third time, there was still a problem after all, and the corners were a little too sharp.

Yes!!!

In the screams of the coachman, the car derailed directly, and the huge momentum caused the carriage to rush out sideways, even the four horses in front of it were not spared, and they were directly carried out by the carriage in the neighing.

Seeing that the coachman was about to be crushed to death on the spot, he suddenly felt that his body was first light and then tight, and the whole person flew out directly, pulling the long sound of screaming, and flew out more than ten meters before landing safely.

"!" With a shout and scolding, Zhang Fei kicked the coachman out, "It's so peeing, it's so timid!" ”

"Okay, you're as rough and thick as someone else!" Wang Xuan glared at Zhang Fei and then said, "Take the coachman down, a good life reward." ”

"The test effect is obvious, just follow the last curve and slope as the maximum standard, there is no need to test the limit, and with the results of the current test, it has been able to achieve the original design plan."

A group of people walked back while saying this, and on the way, Wang Xuan said to Liu Bei: "In the previous war, the grain and grass needed by the army of 10,000 people needed 30,000 people to transport, with the increase in the duration of the war, the increase in the distance of grain and grass transportation, the grain and grass really used for the soldiers was less than one-tenth of the consumption, and the other ninety percent was wasted out of thin air, and a large number of people were requisitioned, delaying the grain planting and losing even more." ”

"And the people have no money and food, resulting in the wife and children at home helpless, causing local unrest and other problems, a series of chain reactions, the cost of war is extremely high, many times, a few years or even more than ten years of accumulation is enough to launch a foreign war, and afterwards will be greatly injured, this is why the war is won, a large number of booty and land have been obtained, the national strength will be exhausted, the most obvious example is the early Han Dynasty After the rule of Wenjing', the national strength was strong, and after Emperor Wu of the Han Dynasty destroyed the Xiongnu, he harvested countless cattle, sheep and horses, but the reason for the great decline of the national strength. ”

"And after the railway, it is different, the cost of transportation is low, if the chain reaction is counted, it can be reduced to one percent of the original, and there is almost no loss of national strength, as long as the railway construction keeps up, even if the war is waged year after year, it will only get richer and richer."

"The importance of the railway, for a country, is tantamount to the lifeblood of the country, where the railway goes, the rule can be extremely stable, and the influence brought by it is not just a matter of how much grain is formed, which is also the reason why I made up my mind to build the railway, which is like the capital around the country, which is the strongest place for the dynasty to rule, the reason is because the distance is close enough, and the railway, can expand this distance dozens of times."

Liu Bei didn't seem to understand it, but there was one thing he remembered, the railway is the lifeblood, and with the railway, the dynasty will not fail!

When the group arrived at the house, Zhang Fei, who had been listening to it all the way, suddenly came to his senses, patted Wang Xuan's arm, pointed to something in the distance and said, "Zaizhi, what is that?" ”

Following the direction of Zhang Fei's finger, it was a four-wheeled flatbed-like thing parked on the railroad tracks, and a vehicle with a lever similar to a seesaw on it.

This thing is called a 'human-powered rail car', and it was originally designed to be used as a vehicle for inspection along the railway, and it is powered by two people pressing the seesaw back and forth, and it travels at a high speed.

"Well, this is a rickshaw that doesn't need horses, and can move automatically as long as you step on the seesaw in the middle back and forth."

Wang Xuan explained casually, but as soon as he finished speaking, Zhang Fei jumped up with great interest, it was supposed to be a human-powered rail car where the two of them stepped on each other, and he split his thighs and stepped on it alone.

The power transmission device of this thing is extremely simple, but the simpler it is, the smaller the intermediate loss, and the faster the relative speed, and before Wang Xuan could say anything, Zhang Fei, a giant monster, stepped on the human-powered rail car and 'shot' out.

Yes, it can only be described as shooting, the speed is too fast, which is the same as a motorcycle with a large displacement accelerates far more than a car in 100 kilometers.

Just a breath, in about three or four seconds, the rickshaw was stepped on by Zhang Fei at a speed of about 40 miles and sped in front of the crowd, leaving only a burst of 'quack' demonic laughter echoing in the air.

When a few people chased out of the house, the speed of the rail car was definitely more than 60 miles, Zhang Fei screamed excitedly, his legs exerted force again, and he was very fast to step out of the phantom, and the speed of the rail car jumped up a step and flew up the first ramp, and then ...... Sou...... Yes...... Boom......

The rail car shot straight out of the ramp at high speed, and finally jumped more than ten meters before falling heavily to the ground.

That is, it was Zhang Fei who controlled the vehicle, and if an ordinary person flew out at this speed, when he found it, it was directly a powder fracture, and after this guy flew out, he simply didn't come down, turned his head and flew back directly, and shouted at Wang Xuan excitedly after landing: "How about it, Zaizhi, this is much faster than your horse-drawn cart!" ”

"Hurry up your uncle!" Wang Xuan rolled his eyes fiercely, "You should be as strong as you and bigger than an animal, and you can step on the rail car and fly out!" ”

"Well, there must be very few people who want to find me with so much strength, but ......" Zhang Fei's eyes rolled, and he smiled: "Can you find more people to step on at the same time, I think it's better than horses, horses are beasts after all, and they may not all be so obedient." ”

Wang Xuan was stunned for a moment and blinked, this world is different from normal after all, people's strength is several times greater than normal, it may not be feasible!

Especially under the premise of pursuing faster speed, after all, the horse is hung with ten horses, and more cannot be controlled, but it doesn't matter if there are more people!

Wang Xuan glanced at Zhang Fei up and down, and said, who is pretending to be this guy today, why did he suddenly become smarter, or is this guy a scientist who has been delayed by the war!