Just a verbal discussion cannot explain the situation.
Li Zhen slapped the lesson plan and shouted:
"No theory is as straightforward as practice."
When everyone heard this, they stopped talking.
Li Zhen said: "We can make both a single-wing aircraft and a double-wing aircraft. Then we can conduct tests, right?"
Everyone said: "But over there with the engine..."
Li Zhen waved his hand: "Ignore the engine for now. Let's make the unpowered frame first... Have you ever flown a kite?"
As soon as the words fell, everyone's eyes lit up.
"Hahaha."
"Yes. Kite."
"fly a kite."
"I know what it means."
"Master Li means to make the frame first, then use a rope to pull it, a steam vehicle, or a horse. It will be flown into the sky like a kite."
"Hey, why didn't I turn around? What's the use of verbal discussions? This is science that requires trial and error and countless experiments to reach conclusions."
“…”
It is better to do it once than to say it ten thousand times.
A very simple truth.
No one has experience, and no one has seen what a real airplane looks like, not even Li Zhen. He only described it verbally from Zhang Zhi and then imagined it in his own mind.
Just do it.
Kyushu Academy of Sciences is not short of money. At the call of the Aviation Institute, the internal studio began to take action.
As for the materials.
Don't think about metal materials for now.
Metal aircraft do not belong to this era.
Because the engine power is too weak, even if the radial reciprocating engine comes out, the estimated theoretical power will not be enough to drive the metal fuselage.
After repeated discussions, Li Zhen decided to use wooden materials to complete the fuselage structure of the aircraft.
Using wooden materials to build the fuselage structure will make the job much simpler. Wood is most easily plasticized and easiest to sand, with the help of steam tools, in the condition of the existing drawing. In two days, all the parts needed for the aircraft were polished.
The best workers polish the parts. The greatest artists are responsible for shaping wooden materials.
Li Zhen and others took the drawings and continued to analyze and analyze the internal structure.
Li Zhen wrote a number on the drawing with a pencil, and said:
"In general, the wooden structure is still unable to withstand the pressure of the wing."
Lin Xiufeng frowned and nodded: "Master Li is right. You can't use solid wood for the wings. Solid wood is too heavy. It's so heavy that you can't even fly without even thinking about it. Unless there is a super powerful power to support it, it is obvious that the largest aircraft in our world is currently The power machine comes from the radial reciprocating engine. Unfortunately, this engine has not been successfully developed yet. Power has limited development... "
Liu Jinghong was also extremely embarrassed, so he did it as soon as he was told. It's quite simple to do.
The brilliant woodworkers milled the wings exactly as they wanted, effortlessly and to the nearest millimeter. But the problem is that the problem only arises when we start preparing to build the wings.
The solid wood wings are simply not strong enough to fly and are too heavy. Theoretically, the thickness of the wing can be reduced to reduce weight, but the principle of conservation proves that reducing the thickness reduces the strength.
What to do
Li Zhen slapped his head: "There is a way, you need to try it boldly."
"any solution?"
"We use steel pipes or metal pipes to build the frame of the wing. Then we cover it with canvas or tarpaulin."
Liu Jinghong frowned: "Oilcloth? Canvas? Use cloth? This... can this be done?"
Lin Xiufeng's eyes lit up: "This is a good idea. The metal frame increases the strength, which is higher than the solid wood wings. And covering it with canvas and oilcloth reduces a lot of weight. This method is good, I I think it’s feasible.”
Li Zhen smiled and said: "In a frame made of steel pipes, iron bars are used to connect the opposite corners. This way the strength of the wings is greatly guaranteed. Even if the fuselage falls apart, the wings will be fine."
“…”
Just do it.
Li Zhen still underestimated everyone's enthusiasm for aviation dreams.
Immediately after abandoning the wooden wings, steel tubes began to be used instead. The steel tube as thick as a thumb is heated and pressed, and shaped into the shape of the wing.
The latest achievement of the electromagnetic institute using alternating current - electric welding technology, supports the connection problem between metals.
In half a day's work, the wings took shape. When the wing frame was placed in front of everyone, at that moment, everyone had such confidence that it could fly.
The total length of the wing frame is ten meters and the width is three meters. The total weight is only over fifty kilograms.
The weight was limited and everyone began to feel hopeful. Maybe, it really works...
Because the drawings of two different models have been drawn long ago. The Kyushu Academy of Sciences has the support of industry, capital, and manpower. In just two and a half days, all the parts needed for two different types of aircraft were built.
It's like playing a jigsaw puzzle. No, it's more like playing a game of building blocks.
Even Li Zhen went into battle himself and started assembling it.
"For the wooden fuselage, we need to use steel wires to fix it."
“Try not to use rivets and screws as they will damage the wood’s resistance.”
"Use steel wires to fix everything. Although there is a risk of falling apart, there is no better way to solve it now."
“…”
A monoplane with a total weight of 306 kilograms.
Biplane, total weight is 410 kilograms.
When the two completed airplanes appeared in front of everyone, Li Zhen couldn't help but shake his head and sigh.
No matter how much restraint was applied, when the final product appeared, the weight still exceeded the expected limit.
Under Li Zhen's command, everyone began to cover the wing frame.
First apply a layer of glue on the frame, and then everyone carefully sticks a layer of paper on it.
That’s right, it’s paper. It is the kind of paper used in books, but it is slightly stronger than that kind of paper. It is good paper.
Of course, the wings can't just be made of paper. This is just the first layer.
After the paper is firmly stuck to the wing, soaked in glue and dried. Another layer of glue was brushed on the paper, and everyone began to cooperate with the silk wrapping.
Then brush another layer of glue on the silk and let dry again.
After the silk is dried, the wings are no longer a frame, but actual wings. It looks like it can fly.
But this is only the second step.
Then the silk was covered with glue, and the thinner canvas was pasted on it again. After the canvas was completely glued, Li Zhen and others wrapped thin steel wire around the wings to stabilize all three layers of material.
Just for the aircraft wings, there are three processes.
The first layer is paper. The second layer is silk. The third layer is canvas.
The strength is sufficient and the weight is not too heavy.
After all the glue inside the wings had dried, the frames of the two aircraft without any power facilities were formed.
A single-wing wooden aircraft.
A double-winged wooden airplane.
The length, width and height specifications are all the same.
Li Zhen stood in front of the two planes, suddenly feeling high-spirited.
In a trance, it seems that I have returned to the time when I was developing steam engines with them...
Recommend a friend's new book "My Calabash Baby"
A gourd vine climbed on the earthen wall of his home, blossoming and bearing fruit. Wang Yaowu counted, one, two, three, four, five, six, seven, exactly seven! Look at the colors, red, orange, yellow, green, blue, purple!
"It's terrible, something big is going to happen!"
…
A good man and seven children, the happy story begins with planting a tree.
(End of chapter)