By mid-March, the winter cold had completely subsided, and the land outside Bonta had begun to become hot and humid, and countless green grasses broke through the soil.

In this season, it is a good time to go out, so when the weather is clear, there will always be countless young masters and ladies from aristocratic families riding their own luxury carriages, driving out of Bangta City and heading towards the verdant wilderness outside the city.

Although the western suburbs are full of factories and little green space because they have been identified as an industrial area by the city lord, the southern suburbs have not only retained green grass and trees because they have been identified as a leisure and entertainment area by the city lord, but also opened up a canal to divert the water of the Sandy River, transforming the southern suburbs, which was originally just a wilderness, into an excellent place with green mountains and green waters, and the singing of birds and flowers.

Today is another sunny day, the sun has just risen in the sky, and the carriages of countless nobles in the city have driven out of the south gate of Bangta City, heading towards the green south of the city.

Countless aristocratic young masters and young ladies plan to take advantage of this good weather to go out in the suburbs, and hold a relaxing and joyful wild feast by the way.

Today, however, is a little different than usual.

Among the countless carriages that rushed out of the city gates, there were two different things mixed in.

The young masters and ladies in the carriage heard the exclamations outside, and they lifted the curtains of the carriage one after another, and saw that on the road leading to the southern suburbs, two people were sitting on a flat, strange-looking thing composed of two wheels and an iron bracket.

Two people with two pedals under their feet. Keep kicking with their feet. Rotate rapidly around a disc.

With this disc turntable. The two wheels on the iron frame kept rolling forward, driving the two men along the road.

To everyone's surprise, the strange thing that these two people sat on obviously looked very thin, except for two wheels, there was only one bracket for everything, but it could carry the two people above it quickly, and it actually overtook several carriages in an instant, and ran in front of many noble young masters and ladies.

Watching the two of them speed down the highway on this unknown strange thing, whether it was the noble young masters and ladies in the carriage. Or the pedestrians on the road, they couldn't help but be stunned.

What the hell are those two people sitting under their butts, and how can they run so fast with them?

However, those two people disappeared into the distance of the road, leaving everyone's questions unanswered.

The next day was another sunny day.

As usual, numerous carriages drove out of the city gates and rushed out of the city.

But at the same nine o'clock in the morning, the two strange-looking things again carried the two men out of the city gates, and once again overtook the numerous carriages, and disappeared at the far end of the road.

The doubts in people's minds have deepened.

On the third day, it was sunny again.

The same thing happened again.

Day 4......

Day 5......

......

For a whole week, every day was a rare sunny day, and every day there were countless aristocratic young masters and ladies who wanted to go out for an outing. But every day, those two strange things rushed out of the city gate with two people, and then quickly disappeared from everyone's sight.

Accumulation for seven consecutive days. Let this mysterious strange thing spread throughout the city of Bonta City, arousing everyone's curiosity.

Someone with good deeds had been waiting outside the South City Gate for a few days and had drawn the appearance of those two strange things.

After analysis, everyone found that the principle of these two strange things was actually very simple, just relying on two flat tires pressed on the ground, with an iron frame as a support, and then two gears connected together as a drive, and finally let the people above use pedals as power.

However, the principle seems to be very simple, and it is really a little strange that these two strange things can run so fast under the drive of human power.

At first, people didn't know what it was or where it came from, but then someone who was careful guessed a little bit from the two tires.

Tires are now only produced by the Xinfei Chamber of Commerce, and the Xinfei Chamber of Commerce has always been able to produce all kinds of strange things, so these two strange things are very likely to be the magic machinery newly developed by the Xinfei Chamber of Commerce!

All doubts and speculations were finally answered on the eighth day. ，

Early in the morning of the eighth day, the newly released "Bonta Daily" finally revealed the mystery.

People guessed correctly, these two strange things are indeed the latest products developed by the Xinfei Chamber of Commerce, but unlike what everyone imagined, this thing has nothing to do with magic.

This thing, called a bicycle, is a human-powered machine that is completely human-powered and does not contain any magic.

But even if it's just human-driven, as long as the cyclist is strong enough, the bike can still be fast.

According to internal information obtained by the "Bonta Daily", it is said that when the new flying chamber is testing the bicycle, it can even ride a bicycle from Bonta City in the early morning and reach the Falling Rain Valley before noon.

You must know that the Falling Rain Valley and the city of Bonta are a full sixty kilometers apart, and it would take more than three hours to run in the best horse-drawn carriage.

This bike is not much slower than the best horse-drawn carriage!

Seeing the report of the "Bonta Daily", people instantly boiled.

With such a good thing, it will be much more convenient when you travel in the future!

Although the carriage is good, raising horses is simply unaffordable for ordinary families.

Although the city's urban public transport system is now beginning to be established, you can take a horse-drawn carriage to most of the places you want to go, but it costs money to take a horse-drawn carriage, not to mention that there are many places where horse-drawn carriages are not available.

Compared to this simple and light bicycle, the carriage is undoubtedly much bulkier.

So after confirming that this bicycle was indeed produced by the Xinfei Chamber of Commerce, the door of the Xinfei Chamber of Commerce Product Service Center in the city was instantly broken by countless people, and countless people came to ask when this bicycle would start to be sold. Everyone can't wait to buy one.

"It seems that the sales of this bicycle are not worried. Xu Yi laughed. Put down the "Bonta Daily" in your hand. Turning his head to look at the bicycle in the R&D workshop of the magic machine tool, the tires are rotating at high speed under the drive of a wind system magic engine.

Strictly speaking, this bicycle is just an by-product developed by Xu Yi for the development of the engine.

Although the bicycle is only a commercial product of the light industry system, the bicycle is a product that contains a lot of extremely important engineering technology.

For example, a series of technologies that can be used in many aspects, such as power structure, bearing drive, gear casting, etc., will be used in bicycle production.

Xu also asked Camby and others to develop bicycles, in addition to adding a new product to the Xinfei Chamber of Commerce, but also allowing Camby and others to gain more experience and theoretical knowledge about these technologies in the research and development process.

It's very different from what it is on Earth.

Mechanical engineers on the planet learn theoretical knowledge first and then start practical production.

And the mechanical engineers represented by Camby in the Xinfei Chamber of Commerce. However, under the guidance of Xu Yi, he first carried out practical production, and then learned theoretical knowledge.

This is also something that cannot be helped, Xu Yi wants to accelerate the development of the industrial system, so he can only forcibly instill his theoretical knowledge in them like this.

Fortunately, Camby and other dwarves really have super talents in this regard, and Xu Yi can understand them deeply with just a little mention, and even be able to draw inferences.

Tongguò developed bicycles, and Camby and others have become mechanical engineers with a deep understanding of power theory.

The next step was for them to combine the wind magic engine, which had been developed to a certain extent, to combine the bicycle.

If we can make a magic bike with a wind system magic engine as the driving force, it means that the development of the magic engine can really be used in practice.

Now Camby et al. are doing the real yàn. It is a test of the power output stability of the wind system magic engine and the test of the bearing strength.

Now this test has been going on for ten days, but the results have not been very satisfactory to Xu Yi.

The first is that the wind magic engine can't keep its output all the time. However, it often stops without warning, and the output power is sometimes fast and sometimes slow.

After careful inspection by Xu Yi and several researchers from the Magic Research Institute, it was found that this was because the wind system magic array engraved inside the engine rotated at high speed because the bearings inside the engine drove the air flow inside the engine to be disordered, which also had a certain impact on the magic array, thus affecting the output power.

If this effect accumulates to a certain extent, it will cause the magic array to temporarily lose its effect, causing the engine to lose its driving force.

There is also a very important issue, which is the issue of materials.

The gears and bearings of the bicycle are not too much of a problem at low speeds, but when they are rotated at high speeds for a long time, the losses increase dramatically.

According to the evaluation, if the maximum speed of the wind magic engine is maintained, whether it is the bearing of the bicycle or the bearing of the engine itself, it is afraid that it will not last for ten hours before extremely strong wear and tear will occur, and even breakage.

There is no way to do this for the time being.

Because it's a material problem, and the material problem happens to be the most difficult problem to solve in the industrial system.

Although the industrial system of the Celestial Empire on Earth is basically perfect, it has always lagged behind in material technology.

As a mechanical engineer in the Celestial Empire, Xu Yi was not particularly good at material problems, and coupled with the restrictions of the country, he was even less able to master the most advanced material technology.

For this question, he can only pin his hopes on the Materials Research Institute led by Patriarch Sluby.

Before this, this material research institute led by Patriarch Sluby had already given Xu Yi a lot of surprises.

Now Xu Yi will hand over this question to him, and when the non-ferrous metal veins on the Black Rice Wasteland are mined and smelted, I believe that Patriarch Sluby will give Xu Yi a satisfactory answer.

Until then, we can only wait patiently.

No matter how eager Xu Yi is for engine research and development, there is no room for negligence in mechanical technology research and development.

As a genius mechanical engineer on Earth, Xu also has this awareness, and also has this patience. (To be continued......)