"In this class, we will learn about aircraft model related knowledge."
In the large classroom of the supervising building, a young academy teacher stood in front of the stage and nervously opened the lesson preparation materials.
His name is Ou Zhiyuan, and he is a sixth-year student of Su Feng, a doctor of science.
Su Feng has been busy researching reciprocating piston engines recently, and the development progress has reached a critical juncture. He has no time to give lectures, so he pulled Ou Zhiyuan, who was about to graduate, over and asked him to teach the students.
It is said to be a class, but in fact it will not involve too advanced content - because it should be understood by students from other countries who do not have a strong foundation in science.
Brush pull.
Li Ang opened the class notes and still sat upright - although he was the first to create the model airplane, with the help of the training system, Su Feng and others also came up with some ideas and ideas that were completely different from other worlds, which were worth listening to. . .
What's more, Ou Zhiyuan was an intern at a publication office and had met Li Ang before. The relationship is okay.
Seeing Li Ang's serious look, the students from Yu State sitting next to him also put away their disappointment and neglect because the teacher in class was not Su Feng, opened their class notes one after another, and pretended to listen.
Ou Zhiyuan on the stage nodded gratefully to Li Ang, coughed lightly, used his mind power to control the chalk to float into the air, and started writing on the blackboard.
"Everyone should know that the flying model aircraft was the latest invention a year ago. It is a man-made instrument that can fly in the air.
The difference from the flying sword is that the power of the flying sword comes from the spiritual power provided by the monks.
The power of the model aircraft comes from the talisman. The talisman generates wind power, causing the model aircraft to fly. There is a layer in the middle. "
"It is true that due to different power sources, the current model aircraft cannot move flexibly like a flying sword, up and down, and command like an arm. But precisely because of the different power sources, the aircraft model has lower requirements for the operator.
Even a monk who has just entered the Qi Sensing Realm can control a medium to large metal aircraft model to change its direction through the air with the help of weak mental power and threads. This is something Feijian cannot do. "
"More importantly, model aircraft have revealed many new possibilities for us - if the model aircraft continues to become larger, will it be able to carry people and cargo?"
"Is it possible for people to sit in the aircraft model and control the steering of the aircraft model directly through ropes and cables? Just like a carriage driver controlling the carriage through the reins."
“The number of monks in a country is limited, but the number of ordinary people is much greater.
If an enlarged version of a model airplane, or airplane, could be controlled by ordinary people and used to carry cargo, it would be countless times faster than today's horse-drawn carriage.
Even more efficient than Feijian transportation. "
When talking about professional content, Ou Zhiyuan's face immediately showed excitement, and he continued: "Planes can carry people and cargo, cross dangerous terrains, and travel thousands of miles in a day.
This is something no monk can do.
Moreover, this possibility is completely feasible in the field of mathematics. "
He manipulated the chalk and wrote several words on the blackboard.
Lift, pressure, speed, density, area, lift coefficient.
"Lift, as the name suggests, is the force that lifts up. Within the scope of science, we regard air and water as fluids. In airflow and water flow, the faster the flow rate, the smaller the pressure generated by the fluid..."
"The one with strong pressure will produce thrust on the one with low pressure... Model aircraft flying and ship navigation are both based on this principle,"
"Why can some aircraft models fly while others cannot? This is related to the concept called lift coefficient. We use the lift coefficient to measure the flight performance of each aircraft model. Its calculation formula is "Lift coefficient equals lift, divided by (speed times speed itself, times wing area times air density times one-half). "
"The greater the lift coefficient, the more perfect the aircraft model's shape will be in theory..."
Ou Zhiyuan was talking eloquently on the stage, and the students in the audience could barely understand him at first. But when he introduced arithmetic and used a lot of mathematical formulas, the students below gradually became numb.
Especially some foreign students.
As for Li Ang, he was once again amazed by the ingenuity of Su Feng and others - they made the wind tunnel on their own with only a few words from him.
Use talismans to generate and control airflow. Place the aircraft model in a wind tunnel for simulation, using telekinesis
Observe airflow and get a lot of data,
In turn, it complements fluid mechanics and aerodynamics.
This is exactly what Li Ang has always wanted to see - to use logical and rational mathematics to replace the vague, perceptual, empiricist part of traditional practice that can only be understood but not expressed.
Experience is extremely personal and will be distorted when written in a book.
Mathematics is a formal science that anyone can learn, verify, and get the same results.
Newton's law of viscosity, Bernoulli's equation, Euler's equation, Navier-Stokes equation, Kutta-Zhukovsky condition, fluid continuity theory...
As long as we continue to develop, aerodynamics will be there, and so will large aircraft.
“The future of model aircraft is infinitely bright.”
With a smile, Ou Zhiyuan took out an exquisite bi-plane propeller model aircraft from under the podium, pushed it gently, and made it hover in the air in the classroom, which attracted exclamations from the audience.
"Everyone should have an engineering subject on their class schedule tomorrow and the day after tomorrow. Then you can apply to the engineering teacher to make a model airplane of your own..."
"Pfft."
The chuckle that came from nowhere broke the atmosphere of curiosity and knowledge in the classroom.
Ou Zhiyuan suppressed his smile slightly and looked towards the direction where the laughter came from, "Does any student have any questions that you would like to ask?"
"Teacher Ou, I have a question."
Bian Chenpei stood up, curled his lips slightly and asked, "You said that the future of model aircraft is infinitely bright.
So, can this model aircraft beware of spiritual intrusion?
Can it resist telekinetic attacks?
Even if we don’t talk about talismans and spells, I’m afraid it can’t even withstand the arrows on the battlefield, right? "
"...Bian Chenpei, right?"
Ou Zhiyuan frowned, "Model aircraft will not be used in war, and there is no direct competition with Feijian. The two have different focuses."
"Then it will be used in the field of people's livelihood,"
Bian Chenpei asked: "How much is the talisman used by the model aircraft worth? What level of talisman master is needed to write it?
What level of mind master control is required?
If the aircraft model is enlarged to achieve the effect you mentioned of carrying people and cargo, how many times will the weight increase?
Do I have to have a Zhuxiao realm talisman master write the talisman every time I use it? "
Bian Chenpei's question made many foreign students have thoughtful expressions on their faces.
They were also surprised by the flying ability of the model aircraft just now, but if they think about it carefully, isn't the power driving the model aircraft still a talisman?
The talisman can only be written by a talisman master, and the talisman master's energy and spiritual power are limited.
If you have a large aircraft model, you need to consume Talisman Masters.
So what is the difference between the various advantages that Ou Zhiyuan mentioned and Feijian?
"this..."
Ou Zhiyuan opened his mouth and immediately reacted when he saw the Taihaoshan costume worn by Bian Chenpei.
The Haotian Dao Sect was originally dissatisfied with the Neo-Confucianism studied in the Academy, and the current model aircraft was a tool that could carry monks and even mortals flying in the sky.
Devout Haotian believers would not want to see the sky filled with aircraft flying above the Haotian Taoist Temple.
Thinking of this, Ou Zhiyuan's retort words were stuck in his throat and he couldn't speak anymore.
"From this point of view, the so-called model airplanes in the Academy are just fancy and large-sized toys. There is no hope of carrying people and cargo in the future."
Bian Chenpei raised a victor's smile on his lips and prepared to sit down.
"Oh, really?"
From the other end of the classroom, Li Ang's voice came.
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