Around eight in the morning, Fang Bai walked into the classroom and heard the boys discussing the mechanical eight oddities. He asked about it and realized his roommates had put up couplets.
Fang Bai sat for a while, the bell rang, and class began.
After two days of classes, Fang Bai conceived the structure of the concrete pump while listening to lectures.
While running in the morning, he suddenly found that his design The idea is clear, so he started designing the concrete pump.
The first step was to design the concrete conveying speed, which directly affected the selection of the Diesel Engine power.
A faster conveying speed meant a larger Diesel Engine power, higher costs, and a higher selling price.
If the conveying speed was too slow, the cost wouldn't be much lower. Even a low-power concrete pump, no matter how cheap, would still sell for over a hundred thousand yuan. Small companies in that era still couldn't afford to buy one.
Therefore, after much deliberation, Fang Bai set the design conveying speed for the first concrete pump at 30 cubic meters per hour, with stone sizes not exceeding 30 millimeters.
If 30 cubic meters of concrete were to be transported to a height of 50 meters, it would be equivalent to work done.
Each cubic meter of concrete weighs approximately 2.2 tons, or about 22,000 Newtons = 2.2 WN;
30 cubic meters would be 660,000 Newtons.
Work W = Fs = FH = 660,000 X 50 meters = 33 million Joules.
If the theoretical design required vertical transport to 150 meters, which is over thirty stories high, the work done would be even greater, reaching 99 million Joules.
And power: P = W / t time = 99 million W / 3600 seconds = 27,500 W watts = 27.5 kilowatts.
In reality, during the conveying process, friction occurs between the concrete and the pipe wall, resulting in frictional losses in the work done.
Therefore, Fang Bai calculated that a Diesel Engine power of 45 kilowatts would be reasonable.
This also directly led to the second step, which was the Diesel Engine power;
The third step was to calculate the working pressure based on the pipe diameter.
The conveying pipe diameter should not be too small, otherwise, the concrete would easily clog the pipe;
Of course, it should not be too large either, as that would mean lower pressure.
Fang Bai initially chose a pipe with an inner diameter of 125 millimeters, calculating the conveying pressure to be approximately 15 MPA.
This pressure was extremely high; 15 MPA was 150 standard atmospheres!
High-pressure alloy seamless pipes had to be used, and seamless pipes with an inner diameter of 125 millimeters happened to be standard pipes, so there was no need for custom orders.
He calculated the pipe wall thickness and material strength to check if they were strong enough under this pressure.
At the same time, considering that concrete conveying would wear down the pipe wall, sufficient wear allowance had to be provided. Otherwise, if used for a long time, the pipe wall would thin out and burst, which could kill people, as not only water but also high-speed aggregate would be ejected.
The design and calculation workload was considerable, requiring many factors to be considered.
Any change directly affected other conditions.
Designing a product was not about pursuing perfection, but about being reasonable and considering cost factors.
Otherwise, high manufacturing costs would lead to higher selling prices, making sales difficult.
Fang Bai spent an entire morning finally finalizing the preliminary design factors for the first concrete pump.
The main structure of the concrete pump consisted of a hopper, pump body, hydraulic cylinder driving the slide valve, slide valve, conveying cylinder, main hydraulic cylinder, and pilot valve.
After determining the main design factors, the next step was to design the main hydraulic cylinder and conveying cylinder based on the Diesel Engine, and then design other structures.
During class, Yang Tan sat next to Fang Bai and saw that Fang Bai hadn't listened attentively all day, but was instead doodling on a blank piece of paper. In the afternoon, he started drawing, at first thinking it was art, but it eventually looked like mechanical drawings.
When class was over, Yang Tan curiously asked Fang Bai:
"Class Monitor, what are you drawing?"
"Designing a hydraulic cylinder," Fang Bai replied casually, without looking up, continuing to draw.
"We just got our mechanical drawing books and haven't even had a class yet, and you're already designing and drawing?" Yang Tan was discouraged. They started at the same point, they were just born and about to babble, while he had already learned to run.
No, he was about to fly.
"I learned it by reading books during the summer vacation, I've already finished it."
"You're a freak, you're too discouraging!"
Before long, many classmates knew that the Class Monitor had already started drawing and designing.
Although they weren't very optimistic that what the Class Monitor designed would be usable, at least he could already draw and design, and his learning speed was many times faster than all other classmates.
For the next two days, Fang Bai was drawing.
There were times when drawing was exhausting. After school, he asked several Class Committee members to stay behind to discuss part-time work.
Li Kai, the Youth League Branch Secretary, was the first to ask, "Class Monitor, are you really doing part-time work?"
"Do you think I'm joking?" Fang Bai asked with a smile, "Everyone is short on money, and many classmates have trouble even eating meat. Since I'm the Class Monitor and I have some business acumen, I'll consider this a welfare for the class.
But I will only provide the plan and the money; the remaining tasks will be divided among you Class Committee members, and then done by the classmates. We'll earn money together, share money together, and if we lose money, it's on me.
Of course, the premise is that it must not affect studies, otherwise, it would be like picking up sesame seeds and losing watermelons. Consider it early social practice.
You help collect the names of classmates who are willing to participate. If they don't participate, they certainly won't get any share of the money."
"Okay, Class Monitor, just arrange it. I also want to participate."
"I'll participate too, I just don't know what you want to do, Class Monitor."
The four Class Committee members had no objections. Since the Class Monitor was putting up the money, everyone would contribute some effort.
The Class Monitor was right; there were many poor students, and many classmates found it difficult to even have a meal with meat.
Fang Bai nodded. In the past few days, he had considered several ways to make money and analyzed and compared them.
First, open a student supermarket. Students would be responsible for management, taking turns on duty during non-class hours, and hired staff would be needed for main operating hours. After deducting various costs and interest, the remaining profit would be distributed according to contribution.
An investment of 100,000 yuan would be enough to open a 300-square-meter student supermarket, though finding a large space was difficult.
The supply chain needed for opening one or multiple stores was the same. Xinghai Company had been preparing for opening supermarkets for several months and had already found many product supply chains. Now, it was just a matter of picking out what sold best.
Currently, opening student supermarkets was highly profitable and would remain so for the next thirty years without a problem, with great potential.
Second, set up middle school tutoring classes. There weren't many tutoring classes now, though there were quite a few private tutors. However, many parents couldn't afford one-on-one tutoring or couldn't find satisfactory tutoring institutions.
Compared to tutoring institutions, Fang Bai felt that opening a supermarket would bring in money faster.
He had many other ways to make money, but it was not advisable to do too many things. One was enough, and Xinghai Company had already done a lot of preparatory work. The only thing left was to keep the supply chain confidential.
"I've decided to invest 300,000 yuan to open three open-concept student supermarkets, located at Jiao Tong University, Textile University, and Medical University, respectively. Your current task is to organize classmates to survey potential store locations, find out what sells well, whether the locations can be sold or rented, and what the rent is."
Before Fang Bai finished speaking, the four Class Committee members were already stunned: "Class, Class Monitor, are you really investing 300,000 yuan?"
"Not 30,000 yuan? 30 millionaires?"
"My goodness, Class Monitor, you have so much money!"
Zhang Li's eyes were wide and round. She couldn't believe the Class Monitor was so rich; how much assets must his family have?
Fang Bai calmly said, "This is what I saved with great difficulty from my own startup. An average of 100,000 yuan per store, about 300 square meters, should be enough. First, try to find locations within the schools, the key is the location.
Of course, if school locations are difficult to secure, then find places with high foot traffic outside the campus."
After he finished speaking, he saw that the four people's expressions were still in shock.
Fang Bai clapped the table, and everyone snapped back to reality.
Li Kai said excitedly, "Class Monitor, I'm listening intently, I'm just too shocked."
Zhang Li also had a look of pleasant surprise, but with some concern, she said, "Yes, such a large investment, what if we lose money? Don't we need to do market research?"
Fang Bai understood the students' reactions. 300,000 yuan was a lot in that era; if distributed among each student, it would be more than enough for four years.
But he didn't plan to do that. Directly donating money had no meaning and could even harm people.
Letting classmates help him make money was quite interesting. It helped others and also helped himself.
He didn't care how much money he made; being able to direct so many classmates to mess around with him was enough to make him happy. People shouldn't just make money in life.
"No need for research, let's just do it directly.
The research that needed to be done, I've already done it. Just follow my arrangements, don't act on your own.
If we lose money, it's on me, but you must listen to my arrangements." Fang Bai said seriously. 300,000 yuan was not a small amount for him either.
However, what he hated most when investing was people messing around below him.
Currently, there were 60 people in the class. If every matter had to be discussed, there would definitely be different opinions, which was certainly not feasible. He wouldn't do the voting thing; he would make all the decisions himself.
Fang Bai continued, "If there's a profit, each Class Committee member will receive a 0.8% dividend, and other participating classmates will receive a 0.6% dividend each. Work will be calculated at an hourly wage, currently 1 yuan per hour, temporarily subsidizing some classmates who urgently need money.
You need to list the tasks and remuneration. Classmates will come to you to take on tasks and will only receive remuneration after completion.
I'd like to remind you that within the four years of university, you will only have dividends, but no equity.
If you do anything that harms the team, your dividend for that year will be canceled;
If you fail a course, your dividend will be deducted, 0.1% per course;
If you make special contributions and have excellent grades, there will be additional rewards.
If you do well, earning a few thousand yuan a year per person is not a problem.
If the target is not met, it means everyone didn't do well, and naturally, there will be no dividends.
After graduation, if the development goes smoothly, I will distribute equity based on everyone's contributions over these four years. Do you understand?"
Fang Bai didn't have time to participate in this supermarket, so he would be a hands-off boss, relying mainly on the classmates for management. Giving dividends was naturally normal.
If it did well and became a chain store, Fang Bai would naturally benefit.
If no dividends were given, these classmates would only receive fixed wages and would not actively pursue building a chain. After all, expanding territory had nothing to do with them, so why work so hard? Their work enthusiasm would be poor, and in reality, Fang Bai would earn less.
It seemed like a loss, but in reality, you had to give to gain.
Giving more bonuses couldn't solve the sense of belonging issue; only when they felt they were working for themselves would they work hard.
Moreover, 300,000 yuan was not much for him; it was just a whim, one percent of his assets.
If you had 100 million, taking out a few hundred thousand to tip, or donate, or buy a big toy, as long as you were happy, that was fine.
So why couldn't he accept a group of top talents helping him open a company and taking dividends? And they would even help him make money.
In fact, the feeling of disapproval, thinking that Xinghai Mechanical Company might give shares to classmates and friends, was completely unfounded. This was a misconception caused by reading other books.