Li Ang dipped some dew from the weeds on his thumb, raised his thumb to face the morning wind, and felt the wind speed, wind direction, temperature, humidity and other factors.
Everything is appropriate.
He turned to look at Yu Feiyu and smiled: "The special envoy can check this aircraft to make sure that no threads or talismans are used on it."
Yu Feiyu frowned slightly, took half a step forward, released his spiritual consciousness, and scanned the "work" shaped aircraft.
Indeed, as Li Ang said, the metal wires, masts, propellers, transmissions, etc. on the aircraft are all made of ordinary metals and light wooden boards, which are not the best carriers of telekinesis.
As for the skin of the aircraft...
"Is this the skin of a raccoon rabbit?"
Yu Feiyu asked.
"It's paper made of raccoon and rabbit skin..."
Su Feng nodded and said: "Peel off a layer of rabbit skin into five pieces, tan them, dry them in the shade, soak them in water and grind them into pieces, then fuse them with the red bamboo fibers to make a whole piece."
Bian Chenpei's eyes lit up and he immediately said: "The raccoon rabbit is a fourth-class monster. Materials made from its skin are naturally alienated materials and are considered contraband!"
"I'm afraid not."
Su Feng glanced at him and said calmly: "The raccoon rabbit paper is very light in weight and extremely tough. It will not break when being torn or exposed to water.
It can be used as a high-quality leather armor lining, or as paper to record important information.
In the third year of Qian's reign, the paper we used again in the academy was raccoon rabbit paper.
It is already a common item in the Yu State, and part of it is provided to Taihao Mountain every year. Among the books and classics carried by the envoys, there may be paper made of raccoon and rabbit skin. "
"..."
Was put together.
Bian Chenpei's face turned ugly again.
Taihao Mountain gathers all the resources in the world, and the students' food and clothing expenses are even more "lavish" than ordinary royal children, and they don't care about the daily necessities at hand.
If he said that raccoon rabbit leather paper was contraband, how would he explain it if the Academy found related items from them?
You can't offer wine in front of the academy or in front of foreign students.
You insist that the contraband in the Academy is contraband, but the contraband in Taihao Mountain does not count, right?
"If there's no problem, then I'll start."
Li Ang smiled slightly, opened the cockpit's skin door, and sat on the seat.
Calling it a cabin is actually a stretch.
There is not much redundancy in the narrow space. The crankset, chain, etc. are all exposed. You need to be extra careful when pedaling to prevent scratches and bruises.
To outsiders, this aircraft looks particularly weird and crude, but in Li Ang's eyes, every part of this aircraft is the crystallization of human wisdom.
It has a very beautiful name in the memory of another world - Gossamer Albatross.
It was designed and manufactured by American aerospace engineer Mike Creedy, and uses human muscle power to drive gears, chains, and propellers to fly.
And on June 12, 1979, piloted by Brian Allen, it took 2 hours and 49 minutes to fly 37 kilometers across the sea and flew across the entire English Channel.
All kinds of information flashed through Li Ang's mind. He looked at the outside world through the cockpit skin.
Under the command of Su Feng, everyone around them dispersed and cleared a runway in the open forest.
Everyone's eyes were focused on this strange-looking aircraft and Li Ang in the cockpit.
"Can this fly?"
"It looks so bulky. It's completely different from the previous model aircraft."
"And it's made of wood. Is it really not going to fly apart halfway?"
The surrounding discussions reached my ears with the breeze,
Li Ang smiled slightly, looked away, put his hands on the handles, and slowly stepped on the pedal.
The high-precision transmission device manufactured by Tantai Leshan itself has no harsh metal friction sound. The pedal drives the crankset and drives the flywheel to rotate from slow to fast.
The chains flowed at high speed, driving the propeller blades behind the aircraft to rotate slowly.
The propeller blades generate wind, pushing the aircraft forward slowly and accelerating.
The pulley under the cockpit rotated across the lawn until it detached from the ground.
Amidst the disbelieving looks, the aircraft left the earth.
The huge horizontal wings were shrouded in the morning light, spreading shadows like the wings of a giant beast.
"It actually, really flew..."
Students from all over the world subconsciously opened their mouths.
Yu Feiyu's eyes narrowed slightly, and his profound spiritual consciousness that was incompatible with his age swept into the sky and enveloped the aircraft.
There is no telepathy, no talisman, not even the slightest fluctuation of spiritual energy.
This aircraft, indeed, as Li Ang said, was driven purely by human power and completed its flight.
"How can it be..."
Bian Chenpei looked livid and muttered to himself,
It is difficult for ordinary people to even lift heavy objects equal to their own weight.
And with such an aircraft, it can break away from the constraints of the earth?
"nothing is impossible, "
Ou Zhiyuan looked at the aircraft and said with emotion: "Do you remember that lift formula that you abandoned like a worn-out shoe?
Lift is equal to the lift coefficient, times one-half, times the speed times yourself, times the density of the air, times the wing area.
Because it is driven by human power, the speed cannot be very fast. In order to increase the lift,
The only way is to optimize the lift coefficient of the wing and increase the wing area.
The wings of this aircraft are specially designed with a lift coefficient of up to three-half and a lift-to-drag ratio of more than 40.
And because the material is extremely light, the total weight is only about fifty kilograms, which means it only weighs one hundred and fifty kilograms including the rising sun.
This makes the load on the average wing area extremely low, and even when flying slowly at an extremely low speed of thirty miles per hour, it will not stall.
Ordinary manpower, when plugged into the propeller's power, rotational speed, pulling force, and speed formulas, can fully satisfy the minimum speed required to keep the aircraft flying. "
Following Ou Zhiyuan's words, Li Ang drove the aircraft around twice in the sky, drew an "8"-shaped trajectory, and then slowly landed.
"Neo-Confucianism is the study of the principles of heaven and earth."
He pushed open the cockpit door and said: "Air, water flow, vegetation, land. Everything has its own rules.
It is true that the speed of this aircraft is far less than that of running fast, and its load capacity is far less than that of a carriage. As for its defensive performance and maneuverability, it is far behind the flying sword.
But its existence proves one thing - human wisdom is the most precious wealth.
In the past, the privilege of flying in the sky, which was considered only for birds and a few monks, can now be possessed by any mortal.
This is the charm of science. "
Li Ang smiled, looking past Bian Chenpei and other Taihao Mountain disciples with ugly faces, and said: "To prove again, I did not use any means of reading or talismans just now.
I wonder if there are any volunteers willing to try flying this aircraft? "
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