"Speaking of which, I have the impression that French aircraft used metal materials during the European War, and the effect was pretty good."

Bayusao frowned and thought for a while, then said with some uncertainty:

"Hiss~ It seems to be called the Breguet 14. It is known as one of the most outstanding models. It is characterized by the extensive use of metal materials in the fuselage frame parts. It is also the first metal-based aircraft to enter large-scale mass production in the history of aviation.

The model of the main material of the fuselage.”

Wang Zhu obviously knew more about this aspect. He crossed his arms and shook his head: "Strictly speaking, the Breguet 14 is not a metal aircraft. It is just that part of the metal is used on the frame, and the rest is like the fuselage skin.

They are all traditional materials.”

Cheng Nuo smiled and nodded: "Yu Peng is right. The Breguet is not a new model across the ages. It is at most an improved version of a wooden aircraft. But this kind of aircraft has become a strong player in the European war sky."

, enough to show how broad the future prospects of metal materials are."

Bayama was a little confused: "If this one isn't the one, then is it the German one?"

"Bingo!" Cheng Nuo snapped his fingers happily and said with a smile: "It's the J1 designed by Junkers. As far as I know, this aircraft is the world's first pillar-less cantilevered all-metal single-seat aircraft. It is similar to the previous one.

Breguet is fundamentally different.

The J1 skin is made of aluminum plates and the interior is reinforced with corrugated steel plates. The J1 aircraft is equipped with a 200 horsepower (149 kilowatts) engine and has a speed of 155 kilometers per hour. It is the fastest flying aircraft in Germany."

"How come I haven't heard of this aircraft?" Wang Assistant held his chin with one hand, his eyes full of confusion: "And Dean, you are also a layman in the aircraft industry. Where did you get these data?

?”

Cheng Nuo was speechless for a moment. Of course, it cannot be said that it was because he had read "Aviation History" in his previous life, and he was trying to deceive him by saying, "I happen to have some classmates in Germany, and I got it through them. The source of the data is absolutely true and reliable.

"

"But this..." Matters involving the cutting-edge development of the aircraft industry, Wang Zhu wanted to break the casserole and ask the truth.

"Business matters, we'll talk about the rest later. There's not much to say." Bayuzao stopped his friend and didn't let him continue asking: "If the data is true, let alone Germany being the fastest, it is possible that it is the fastest in the world, but

It’s such an amazing aircraft, why haven’t we heard of it?”

Cheng Nuo was stunned for a moment, and then he wisely said: "The mass production of any aircraft must go through repeated test flights, not to mention it is still in wartime, and the rigor will be even higher. In the meantime, J1, J2, and J3 were successively iterated, because

There is not enough experimental data, so it is basically still in the experimental stage.

However, it is understood that by the beginning of this year, the new J4 has officially begun to be installed, and aluminum alloy has become the main material of the body."

The description in words alone was a bit weak, so Cheng Nuo simply pushed aside the documents on the table, took out a large piece of white paper and began to draw on it, drawing the J1J4 series aircraft one by one.

Some people say that it is often the few people at the top of the pyramid who play a decisive role in promoting the development of a certain industry. The same is true in the aviation field.

Professor Hugo Junkers, the designer of the J series aircraft, was first a famous industrial inventor before becoming a pioneer in the German aviation industry. In the fields of engines, power transmission and machinery manufacturing, Professor Junkers has as many as 1,000 employees

The remaining patent rights.

When the company was founded, its initial business was the manufacture of steam boilers and radiators. In the process of transforming the patented invention into industrial products, Junkers' business developed smoothly.

Unfortunately, the good times did not last long. When the German Air Force entered World War I and was in urgent need of a large number of combat aircraft, the government began to widely "mobilize" well-known factories to transfer to manufacturing aircraft. Junkers was one of the companies "transferred"

.

When he changed careers, Junkers was already 55 years old. At an age when he should have been able to defend his country, he had no choice but to fight for it again.

"Traditional aircraft use wooden trusses and floors to form the body frame structure, which are reinforced with brackets and cables and covered with cloth skins. However, the J1 uses steel floors and bulkheads to form the trusses and skins. This is not

It’s not that Junkers is reluctant to use aluminum, but the price of aluminum is simply too high.”

Cheng Nuo bent over the desk with both hands, holding a ruler in one hand and a pencil in the other. It didn't take long to draw the structure of the J1 model aircraft.

"Of course, as an outsider, my focus on aircraft is definitely different compared to the two of you who are experts. If you point out the wrong things in the drawing, I can learn more while I'm at it."

"Dean, what you said is too outrageous. This drawing is too detailed. If we didn't know your origin, I would have thought that you personally designed this aircraft." Wang Zhu, who was watching the drawing on the side, became more and more excited.

I admire it and sincerely praise: "There are even labels on the scale, it's really amazing."

After all, people are still emotional animals. Listening to the praises of his subordinates, even Cheng Nuo was a little shaken. If he didn't pay attention, his pencil would make an extra scratch and he quickly wiped it with something: "I drew this to let everyone give their opinions, and

I’m not trying to flatter you, if you have any problems, let’s just say it.”

Bayama hesitated for a moment and asked: "Looking at your sketch, I just calculated it in my mind. It is indeed very practical. However, this aircraft uses thin plate steel. As a result, the aircraft is very heavy and can easily cause it to climb.

It has poor maneuverability. I wonder if you have considered this?"

Cheng Nuo's pen tip paused for a moment, and then explained: "But we must also consider its clean single-wing layout, which makes the aircraft's resistance very small. Although it is only equipped with a 120-horsepower engine, its actual speed reaches 170

Kilometers per hour, this is already great, but what will happen if it is replaced by aluminum?"

Inspired by this sentence, the expressions on the faces of Bayama Zao and Wang Zhu were wonderful.

Doubtful, shocked, enlightened, unbelievable, reasonable.

However, Cheng Nuo did not struggle with this issue, but struck while the iron was hot, continued to take out the straw paper, and drew the remaining J2, J3 and J4.

"The J2 is optimized as much as possible on the basis of the J1 to become a single-seat fighter with weapons. The J3 is an unfinished mid-wing aircraft design equipped with a rotary engine. It uses corrugated (corrugated) aluminum alloy to replace the original

steel plate structure.”

The screen changed to J4, and suddenly it switched from a monoplane back to a biplane.

Cheng Nuo felt a little regretful: "Although the J4 is better, all flight control surfaces (wings, horizontal tails) are made of corrugated aluminum alloy to achieve weight reduction, and it is possible to mass-produce it, but it is a pity that it has to return to bi-wings.

It's a pity."

Bayama said with emotion: "If I were the head of the military, I would definitely choose a biplane. A small amount of material can make the wings very strong, thereby improving the aircraft's flight performance."

Cheng Nuo smiled and shook his head, questioning: "The power of the aircraft is getting stronger and stronger, and the flying speed is getting faster and faster. The pillars in the middle of the two-layer wings bring a lot of resistance, which seriously restricts the improvement of the aircraft's flight performance.

Aerodynamically speaking, biplanes are only suitable for low-speed flight. As soon as the speed increases, not to mention that the support in the middle of the wing will increase the flight resistance, even the upper and lower wings themselves will interfere with each other.

It’s a pity that the German military doesn’t appreciate the structural design of the monoplane, so it wastes such excellent performance and goes against the development trend of aviation. It’s a pity, it’s a pity.”

Historically, the J4 prototype was designed and completed in early 1917, but it did not debut on the Western Front in Europe until September 1917. By the end of World War I, the military had placed a total of 283 orders, of which only 227 were completed.

Only 184 were delivered to the troops.

But it is such an aircraft that turns stably, flies freely in strong winds, has good unpowered gliding performance, and has a flight record of being hit 85 times and in good condition. It was not until 1918 that the French army claimed to use high-speed aircraft.

Cannon record of this type of aircraft.

More and more detailed information from later generations showed that this record was probably a false report of military information. In other words, this aircraft has never been shot down since its test flights, to its mass deployment in the army, and to the end of the war. It is known as a

The most outstanding German ground attack aircraft during the war, its performance was terrifying.

The Soviet/Union aircraft designer who later designed the aircraft began to leave. After returning to China, he designed the IL-2 attack aircraft on the basis of it. The Soviet army called it a "flying tank" and the German army called it the "Black Reaper".

Uncle Qiao compared the machine to being as indispensable as the bread and air of the Red Army.

Of course, all this has nothing to do with Cheng Nuo. What he needs most right now is for Bayuzao to absorb the concepts of these aircraft and design an all-metal monoplane to successfully complete this transition period.

"In other words, the double wing solves the problem of whether the aircraft can take off. Now what we have to do is the question of whether it is good or not. If we want to design a higher, faster, and larger aircraft, we must use a single wing.

Design." After drawing J4, Cheng Nuo put down the pencil. Although he was still smiling, his tone was unquestionable.

Bayuzao originally wanted to fight for the wings again, but seeing that Cheng Nuo seemed to be very knowledgeable about aircraft design, and that his words sounded like orders rather than discussions, he gritted his teeth and said, "Okay, let's go back and learn it again."

Cheng Nuo felt a little relieved: "As for the landing gear, you can continue to use the pontoon type. You can also change it to wheels when the technology matures. I respect your past designs on this point."

According to Cheng Nuo's vision, although the aircraft was heading in the direction of preparing for future wars, there was still some time before the end of World War I, and there was also a long time before "September 18th", so this period of time could not be wasted.

The road for military use was temporarily blocked, so it was natural to think of civilian use.

Especially after the end of World War I, a large number of fighter aircraft poured into the commercial aircraft market. For example, the DH.9 bomber produced in Britain was converted into a civilian aircraft and was very cheap. This made the competition in the commercial aircraft market very fierce.

Even in this era, Junkers Aircraft designed the world's first all-metal passenger aircraft based on the J series aircraft. Even though it could only carry 4 to 6 passengers at the time, it was still sold all over the world.

From tropical Colombia in South America to the snowy areas of Canada and Finland in the north, people used this kind of aircraft, dominating the international aircraft market in the 1930s.

Thinking of this, Cheng Nuo couldn't help but secretly swear in his heart that the C919 Shang Aircraft in the previous life was stumbling, and even had to use materials from other countries in some key parts in order to obtain international licenses, which made people choke.

We must make good use of the advantages of time travel and plan the international aviation market in advance.

"Dean, if the previous design plan is completely overturned and redesigned, the manpower, material resources, and financial resources we need will be greatly increased. You'd better be mentally prepared." Following the aircraft design drawings Cheng Nuo took out,

Wang Assistant looked at it for a while and gave his thoughts.

"Yes, it means that all we use in this area are new technologies and new methods. Just running in will take a long time. Is it worth it, Dean?" Bayuzao asked sincerely.

Rather than new technologies, he wants to get domestically produced aircraft into the sky first, and let’s talk about the rest later.

Cheng Nuo smiled and said: "That's not a coincidence. You can use this time to design our first domestically produced wind tunnel and lay the foundation for the subsequent aircraft design. It just so happens that the comrades from Watson Electrical Manufacturing Factory are coming over, so you can just do it."

Find them to cooperate with.

Regardless of the cost, we will make some low-speed, high-speed, and ultra-high-speed fans to support your work. In other words, if you raise your needs, they will solve the problem."

Bayuzao's eyes lit up and he agreed very much with this suggestion: "This is great. We have long wanted to have our own wind tunnel. This way we can not only experiment with new aircraft, but also compare the advantages and disadvantages of double wings and single wings."

"

Cheng Nuo smiled. It seemed that the other party still missed Shuang Yi, but he didn't blame him for these trivial things.

"Right now, you are designing a new monoplane all-metal aircraft based on the J series aircraft and combined with your previous experience. We will try to build the prototype as quickly as possible, and we will open the door to you in terms of funding."

Bayuzao immediately straightened his body: "No problem, we will make the design drawing as soon as possible and hand it over to you for review."

Cheng Nuo smiled and waved his hand: "You all know in your mind whether the design can fly and whether it is good or not. I don't want to repeat it if necessary. But one thing is that you all know the situation in our country. In terms of prototype production,

Don’t think about localization yet.

Aluminum, steel, and copper can all be made from foreign materials first, and then we can gradually replace them after we figure it out."

Of course, in this bad era, it is difficult to find these heavy industrial materials purely domestically produced. Even if you struggle to find them, their quality lags behind those in Europe and the United States.

Therefore, in terms of heavy industry, we still have to rely on Cheng Nuo and the Academy of Sciences to promote it.

If everything goes well and the plane designed by Bayuzao and the others can fly into the sky normally, Cheng Nuo will naturally bring out his killer weapons.
Chapter completed!