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The legend about Chen Liang is widely spread, and there is an interesting story that Xu County Order has also heard, saying that Chen Liang rode a horse and stepped on the snow to visit Xin Qiji, but said that Chen Liang hit a horse and came to the small bridge not far from Xin Qiji's house, Chen Liang dismounted from his crotch and refused to cross the bridge, as a result, Chen Liang was furious, drew his sword and cut off the horse's head, and then walked across the bridge to see Xin Qiji.

Xu Xianling also felt that this was an interesting thing, and he was so downcast that Chen Liang could still perform this play recklessly, this is a real celebrity.

In short, Chen Liang has a lot of tricks, I don't know what tricks Chen Liang used to match Mao Geng and the little girl of the Su family this time. Anyway, it's a happy event, but you might as well join in for a while.

Chen Liang is unscrupulous here in Xu County, and in front of Mao Geng, who is a little younger, he never pays attention to it, and he is stupid and stupid at every turn, but Mao Geng has cross-era insight, and Chen Liang's Taoism is difficult to gain a sense of superiority here in Mao Geng. But Chen Liang is still a warm-hearted person, and he can't point fingers at business, which is just as difficult for him. You can't help but admire Chen Liang's ability to find trouble when he has nothing to do, Chen Liang will always have a heart that is not willing to be lonely, always have a strong spirit of participation, and an irrepressible desire to command, and he must find something he can toss around here in Mao Geng.

In the end, as he wished, Chen Liang finally found something that he could point fingers at, that is, the love affair between Mao Geng and Su Zhiyan, and, by chance, Chen Liang immediately appeared a magical prop, and Chen Liang immediately decided to direct a love drama.

In other words, this prop is actually used by Mao Geng to determine the length unit.

Mao Geng's previous design all tried the metric system, but the Great Song Dynasty used the Song ruler, Mao Geng felt that in his own engineering practice, it was necessary to use the metric length unit of "meter" and "millimeter".

Theoretically, it is possible to obtain a length of one meter through a simple free-fall motion test, because the gravitational increase of a thousand or even five thousand years ago has not changed from the gravitational increase of later generations, which is 9.8, although there are slight differences in different longitudes and latitudes, but after all, there is little difference, as long as you put the formula of free fall:

h＝1/2xgxtxt

As long as the time of free fall is measured, the height of the free fall can be calculated in meters, and then the length of one meter can be obtained.

Now the clock has it, in order to keep the time more accurately, Mao Geng also added a plus drive stage to the time watch, so that the watch has a stopwatch function, the longest and fastest hand is the stopwatch pointer, so that the accurate timing of free fall has been fully satisfied.

But this free-fall test must be at a sufficient height, even at a height of 12o meters, the free-fall time is less than five seconds. Based on the principle of rigor, in order to obtain as accurate a number of samples as possible, Mao Geng finally set four general test height ranges: 1oo meters - 2oo meters interval, 2oo meters - 3oo meters interval, 3oo meters - 4oo meters interval, 4oo meters - 5oo meters interval.

All right! The trouble is coming, the tallest building in the Great Song Dynasty is about a pagoda, and the highest is only a few tens of meters, of course, it can't meet Mao Geng's free fall test. Mao Geng is a little nostalgic for the high-rise buildings that rose from the ground in later generations, the skyscrapers of those later generations are higher than one another, the tallest Burj Khalifa in Dubai is more than 8oo meters high, and the king of Shenzhen is nearly 4oo meters, but these buildings suitable for freefall tests are not without Song at this time! Well, well! Let's think of other ways.

In order to carry out this inexplicable experiment in the eyes of his disciples, Mao Geng decided to make the hot air balloon come out in advance, this hot air balloon must also be the kind that carries people, in Mao Geng's design, someone must operate on the balloon, he is responsible for straightening the rope that measures the height, and is also responsible for throwing the iron ball and recording the time of throwing the ball. So not only did you have to put a person on the balloon, but you also had to put on a time table, an iron ball, a rope for measuring altimetry, and an alcohol blowtorch to provide heat for the hot air balloon.

The diameter of the airbag of this hot air balloon is more than five zhang, counting the loss of more than 30 pieces of silk, a piece of silk is three pieces of money, plus ropes, the material cost of the light airbag is more than 1oo times, which is definitely an extremely extravagant move. But mulberry silk has an advantage, that is, it can withstand a certain high temperature, and chemical fibers pretending to be silk abound in later generations, but the chemical fibers will be scorched as soon as they are burned, and mulberry silk is burned with a lighter, as long as the time is short, the silk will not be damaged. Therefore, even if silk is a little more expensive, it is the best hot air balloon airbag fabric.

At this time, the liquor was also very expensive, just because the government implemented the liquor law, which added heavy taxes, so it cost a lot of money to distill 30 catties of alcohol. Fortunately, it was not too difficult to distill the liquor to more than 95% alcohol, and after investing money and manpower, the disciples distilled the alcohol as fuel as scheduled.

Copper alcohol blowtorch is more difficult, forging copper tank shell and welding technology has been more popular in the Song Dynasty, and there is Mao Geng's guidance, it is not a difficult thing, but the alcohol blowtorch is also a pressure vessel, the pressure is of course not large, but it needs to be sealed, and there is a pumping device, in the absence of rubber, Mao Geng uses felt impregnated asphalt as a seal, and also pieced together this alcohol blowtorch to make, tried, the effect is actually passable, anyway, it can make the hot air balloon rise, in terms of function, this is enough.

This hot air balloon was so big that in order not to alarm the people nearby, Mao Geng deliberately chose the early morning time to conduct the test after he was ready.

Several rows of simple houses have been built on the Hongniwan Beach, with red brick walls and cement and bamboo fiber pores, where Mao Geng and Chen Liang now live.

Winter water, sailing than other seasons are less, the opportunity to use the water wheel winch every day is not much, Mao Geng of course will not waste the power that the water wheel can output, when the tugboat is not used, the water wheel power is used to drive the production of the drive shaft, by this drive shaft to drive the woodworking machinery and the new metal lathe. The woodworking machinery here has to mass-produce sheets and components for the water wheels and winches that will be built in the future, and Mao Geng's design principle is a standardized modular design, and he is now making standard wooden parts for the two sizes of water wheels. The metal lathe is being assembled and will be completed in about four or five days, when the first hydraulic metal lathe will be built, which is obviously something to look forward to. All of these required Mao Geng's guidance, so Mao Geng simply moved here. And Chen Liang refused to leave Mao Geng in order to get some more materials and construction technology for building a house from Mao Geng, and also took his concubine to live here, as for the more than 150 reformed people who had been recruited, they were sent to two bases for queue training, and Chen Liang didn't have to worry about it for the time being.

In the early morning of this day, there was just no wind, and Mao Geng's free-fall test quietly began in Hongniwan.

Mao Geng didn't wake up Chen Liang, but just took ten people to the newly leveled Hongniwan Square. After the airbag is puffed up, the airbag is inflated first, the blower driven by the water wheel power starts, and the air bag is poured straight into the airbag, and after the airbag is puffed up, the alcohol blowtorch is lit and the air in the airbag is heated, and after a while, the airbag staggers off the ground, and the rope connected to the gondola is straightened little by little. At this time, Fugui, who was in charge of the aerial test, had already waited for the balloon to rise in the gondola, and as the alcohol blowtorch continued to spew flames, the temperature of the air in the airbag rose further, and the buoyancy also rose at the same time, until the gondola was lifted off the ground, and the hot air balloon began to soar.

There are three ropes hung on the hot air balloon, two of which are pulled by two people to control the hot air balloon at a predetermined height and a predetermined position, and the third rope is the rope of altimetry, on which is hung an iron cone weighing about five catties, and the support in the hanging basket needs to control the handle on the hanging basket winch, so that the iron cone is just off the ground - of course, it is best to keep the altimeter rope perpendicular to the ground, and this free-fall test is really complicated.

Of course, such a complicated thing needs to be communicated up and down at any time, and the tin horn once again came in handy, helping to return to the condescending position, with the help of the power of the tin horn, listening from below, his voice was really resounding in the sky.

The upper and lower tongguò tin horns shouted, the altimetry link also came to an end, Fugui marked the altimetry rope, and the following entered the finale of the free fall time.

In fact, it was only a matter of a moment, and almost at the same time as the mark was marked, Fugui shouted "Below, release the ball." Fugui exhaled, violently released the iron ball, and at the same time read the time on the timetable, and the sound of the time was echoed in the air through the tin horn:

"6:49:15.34."

The ten pairs of eyes below were staring at the iron ball painted red from the sky, only to see the iron ball fly down, and as soon as the iron ball landed, there was a time report in charge of telling the time:

"6:49:20.21."

Mao Geng breathed a sigh of relief, this first set of numbers jù was obtained.

This is followed by raising the balloon and repeating the previous qiē, resulting in the other three groups of numbers jù.

But such a movement, after rising to the first height, woke up Chen Liang, Chen Liang is a very lively person, when he hurriedly got up, the experiment was almost over, but Chen Liang finally caught up with the scene of the balloon rising to the highest point and slowly descending after that, this Jun was immediately attracted by this scene. Good boy! This can be called the pinnacle of performance art, and the performance art of cutting off the horse's head back then is already shocking, but compared with Mao Geng's handwriting, it is simply a small thing.

After the hot air balloon was completed 6, Mao Geng was busy counting the number jù and determining the length. Mao Geng calculated the height value based on the time taken in free fall and obtained four height values in meters. And the four height marks marked on the altimetry rope are also recorded with four ropes, so that four long ropes of known length in meters are obtained, and the following work is nothing more than to measure the length of one meter based on these four ropes, which is just a simple arithmetic problem.

In this way, Mao Geng got a length of one meter in the Great Song Dynasty, and he was excited for a while, and a person was thinking about how to implement the metric system in the Great Song Dynasty in the future, including kilograms - isn't that the weight of a cubic decimeter of water!

But the hot air balloon in Chen Liang's eyes is a very good prop, Chen Liang pondered it for a while, and decided to use this wonderful prop in the place where it should be the most brilliant.

Chen Liang was a little worried, Mao Geng seemed to be born with a lack of romance, for fear that Mao Geng would reject his kindness. As soon as Chen Liang told Mao Geng about his thoughts, Mao Geng did not refuse as he imagined, but just thought silently for a while, and then readily agreed to Chen Liang's seemingly nonsensical plan.

******

Su Zhiyan actually went to watch the trial demonstration of Hongniwan last time, but she sat on a boat downstream from a distance and watched it from a distance behind the curtain.

Father and brother are bent on marrying Mao Geng, before Mao Geng marries Ling'er, Su Zhiyan has actually secretly agreed, but after Mao Geng married Ling'er, his father and brother still did not change his original intention, Su Zhiyan felt that he wanted to entrap Mao Geng, which seemed to be no different from Qu Jiatong.

After the enthusiastic mother-in-law came to persuade herself, but her words were still listening, since ancient times, beauties love heroes, Su Zhiyan is no exception, and her mother-in-law praised Mao Geng as a responsible man, not only talented, but also pure-hearted, which is a rare husband. Su Zhiyan took Feng Saburo as a reference, and also felt that Feng Saburo was just a gentleman compared to Mao Geng, and Feng Saburo was really lackluster in other aspects except for his deep affection for himself.

But it is precisely because Feng Saburo is extremely devoted to Su Zhiyan that Su Zhiyan feels that Mao Geng didn't even come to see him after marrying Ling'er, even if he was forced to marry Ling'er, at least you have to explain it and confess it! At this point, Su Zhiyan is a little childish, and she always has awkwardness in her heart.

That day, Su Zhiyan secretly watched the scene by the Zishui River, and her mind was full of Mao Geng's shadow, Su Zhiyan knew that all this qiē was directed by Mao Geng behind her, and this wonderful performance made Su Zhiyan blush and warm, and looked forward to Mao Geng suddenly appearing in front of her at some point.

However, the hateful thing is that Mao Geng has not come to the door for a long time, and he has not said anything for so long, Su Zhiyan was extremely disappointed in her heart, and remembered the various benefits of Feng Saburo, in the past two days, her nose is not a nose and her face is not a face, and she looks negative, which makes Su Fu a little worried about her.

Yesterday, Su Zhiyi came to inform him that the Su family was going to hold a happy event in Hongniwan today, where there was a good platform, and I heard that a large piece of land had been leveled, which was a good place to do a happy event. Su Zhiyan wanted to know who was in the Su family to do the happy event, but Su Zhiyi was vague and claimed that he would know when the time came.

The Su family today chartered a new luxury passenger ship built by the Dun family, it is said that this is also Mao Geng's design, the size is comparable to the 150,000 catties of woolen boats, but this ship is built very elegantly, the boat is carved and painted, the line of sight is extraordinarily good, the water of the Zijiang River in winter is particularly clear, the sky is blue and the water is blue, in fact, the scenery on the boat is still good, Su Zhiyan feels that the two sides of the strait are smashed, and the feelings in his heart are very low.

The boat arrived at Hongniwan, and now there are only one or two thousand people surrounded by Hongniwan, and what makes Su Zhiyan strange is that the big ship dropped anchor at this time and stopped on the river.

Suddenly, a burst of drum music sounded, Su Zhiyan was attracted by the sudden drum music, and her eyes involuntarily looked at the place where the drum music sounded, but saw a large colored ball on the side of the crowd of onlookers bulging little by little, and then getting bigger and bigger, more and more round, and suddenly rising to the sky.

Su Zhiyan immediately saw that there was a hanging basket under the big colored ball, and the person on the top of the hanging basket couldn't see clearly, but Su Zhiyan felt that it was Mao Geng.

The balloon went all the way up, and at this time, the same voice came from the high platform as the commentary on the trial that day, it was Zhang Haisan:

"Dear relatives and friends, distinguished guests, today is a good day! Day! ”

At this time, someone actually sang:

"Hey, today is a good day, everything you want can come true, today is a good day, and the balloon is raised to celebrate the celebration."

As soon as the singing stopped, Zhang Haisan's voice sounded again:

"Distinguished guests, relatives and friends, everyone knows Mr. Chen Liang, now, Mr. Chen Liang is by my side, on this festive day, please Mr. Chen Liang to say a few words for us."

Then, I saw Chen Liang raise the iron horn and shouted almost with all his might:

"I, Chen Liang, have a friend who likes a woman, and before that, he didn't confess to this woman, but it's not too late. Today, he wants to say his favorite in front of everyone out loud, and everyone says, okay! ”

Chen Liang's sensational words made all the people present burst into great enthusiasm, and for a while, gossip and wishes flowed arbitrarily on both sides of the Zishui River, and even Su Zhiyan, who was far away on the boat, also felt a warm atmosphere.

Chen Liang looked up at the balloon in the air, and the iron horn was also facing the sky, shouting loudly:

"Mao Geng, she's looking at you, do you still have to wait! Fast! Tell her what you like. ”

At this time, the balloon was getting higher and higher, and Mao Gengxin said that he had never thought of confessing like this, it was not his character. If it weren't for Chen Liang, he really wouldn't have the courage to confess loudly to Su Zhiyan on such an occasion, it was Chen Liang who awakened his passion, at this moment the passion burned, Mao Geng no longer had the shackles in his heart, and the voice of love spread far and wide through the tin horn:

"Su Zhiyan, I like you! I want you to marry me! Marry me Mao Geng! ”

Mao Geng shouted out this sentence, and suddenly felt that he didn't come to Da Song in vain, I don't know what Su Zhiyan would think, but I, Mao Geng, will not regret it, I like this moment, this moment of passion. Although Mao Geng's heart was burning with passion, he was also worried in his heart, lest Su Zhiyan would not be able to accept such a confession.

With Mao Geng's confession, the sound of gongs and drums below suddenly sounded, and hundreds of red Kong Ming lanterns flew on both sides of the strait at the same time.

At this moment, on Mao Geng's hanging basket, a huge red scroll was also opened little by little:

"Su Zhiyan, I like you, marry me!"

The unfolding of this huge scroll immediately made the onlookers on both sides of the strait boil, they had never seen the spectacle of a hot air balloon carrying people into the sky, and at this moment they were even more stunned by this bizarre show of love.

Su Zhiyan heard and witnessed all this, and suddenly felt a feeling of happiness to the point of dizziness. Su Zhiyan said in her heart, I am very happy that you are willing to do this for me, but do you want me to answer you loudly with a tin horn - "good"! Although I am willing to say 10,000 "good" words in my heart, I am a daughter's family, so I can't shout like you!