Acton really lived up to Lin Hongfei's expectations, and immediately said, "Compared with Gulfstream V, the biggest advantage of TU-134B is his carrying capacity: if I remember correctly, the maximum commercial load of TU-134A is 8200 kg, and the maximum load of TU-134B is more than 9000 kg. ”

"I have analyzed the Gulfstream V, according to the data released by Gulfstream Aerospace, its empty weight is 21.8 tons, and the maximum take-off weight is as high as 41.1 tons, such a large aircraft, but what is its maximum payload? 2900 kg! Can you believe it? Only 2900 kg! 2.9 tons! The remaining 18.2 tons are all loaded with aviation fuel, and the weight of aviation fuel alone is enough to catch up with the weight of this aircraft. ”

Acton waved his arms excitedly, as if the maximum load capacity of 2.9 tons was what a sin Gulfstream had committed, "And our TU-134, with an empty weight of 29 tons and a maximum take-off weight of 47 tons, the comparison of the two numbers means that the TU-134B has a more excellent aerodynamic structure, and the most important point is that because the initial design of the TU-134B is a civil aviation aircraft, so the internal modification space of this aircraft is very, very large, huge!" So it's easy to be modified. ”

"I have studied this TU-134 that already belongs to Mr. Andrade, his fuselage structure is actually a kind of 'top floor plus attic' structure, and the house we live in is different, this 'top floor plus attic' structure is actually upside down, the top floor is the crew compartment, which should have been in the attic above is now under our floor, this 'attic' with an internal height of less than one meter is responsible for two large cargo compartments in front and one in the back and several distributed fuel tanks with a total capacity of 1400 liters. In addition, the wings can carry 16,600 litres of fuel, and the total fuel volume can reach 18,000 litres. 14.04 tons. ”

"That's a huge advantage." In the face of the detailed example given by Acton, Lin Hongfei had to nod in agreement, and what they said did make sense.

"But, Mr. Lin, haven't you noticed that in addition to the problems with the wings and nose fairings just mentioned, your plane has one of the most serious and fatal problems...... It's not elegant enough. ”

"Oh......" Lin Hongfei was really surprised this time, the model is not elegant enough? But in terms of aircraft alone, this TU-134B after installation is enough to afford the word "elegant". What is Acton saying for what is this?

"Let me give you an example, Mr. Lin, those business jets that are known for their elegance have one particularly striking feature: the wing length and the fuselage length are very small."

Is that the case? Lin Hongfei frowned: If it weren't for Acton saying this, Lin Hongfei really didn't notice this.

"Let's give an example, the Gulfstream V that Gulfstream Aerospace is developing has a wing length of 28.5 meters. The fuselage length is 29.4 meters, a difference of only 0.9 meters, and the length of your Gulfstream G200 is 19 meters. Wingspan 17.7 meters. The difference is only 1.3 meters, and the Gulfstream IV, which is now popular in the business jet market, has a fuselage length of 26.9 meters and a wingspan of 23.7 meters, a difference of 3.2 meters...... The Cessna Citation jet fuselage that just went on sale on March 30 this year is 13 meters long, but it has a wingspan of 14.3 meters. Mr. Lin, do you know what that means? ”

"What does that mean?" Lin Hongfei asked modestly, for this kind of thing, he has never been "ashamed to ask".

"Meant as a business jet. Your TU-134B is not elegant enough, you need to know the aesthetics of Westerners on business jets: the length of the fuselage and the width of the fuselage should be roughly equal, the engine is located in the rear of the fuselage, the wings are smooth and elegant, such a business jet is the most beautiful, but look at your TU-134B, the fuselage length is 37.1 meters, but the wingspan is only a pitiful 29.77 meters, of which the difference is 7.33 meters! ”

"That's 7.33 meters!" Acton waved his arms excitedly, "This makes this TU-134B look like a clumsy sparrow, but the other business jets are elegantly like a swan...... Forgive me for saying that, but that's just the way it is! ”

After saying the most, he aggravated his tone heavily, "In my opinion, the length of the fuselage of your aircraft obviously cannot be shortened, which is our advantage in itself, since the length of the fuselage cannot be shortened, then the wings must be lengthened, and the wingspan should be lengthened to the extent that the fuselage is about the same...... Even if there is a gap, it should be controlled within 2 meters, so that the TU-134 aircraft can be elegant enough, and it stands there like a noble white swan......"

Obviously, this guy's youthful temperament has flare up again.

Lin Hongfei is different, as a designer, he will not have a youthful temperament, and his mind quickly began to calculate the possibility that Acton said: even if the wing is enlarged in equal proportions and the wing is lengthened to about 37 meters, then compared to the wing area of 127.3 square meters, the enlarged wing area will reach almost 200 square meters, which is more than 70 square meters, how much additional lift can be provided for the aircraft?

Even if the wing is enlarged, the structure and wing fuel tanks and fuel cause the wing to increase by 30% than the original, but also to provide at least 20% more lift than the original, now TU-134B in the use of D-30-2 engines, carrying 5 tons of personnel and materials, can reach a range of 3700 kilometers, and according to the previous modification plan, after the modification to an ultra-light load business jet with increased fuel capacity, the aircraft has a maximum range of 7000 kilometers, can provide an additional 20% of lift, This means that the aircraft can fly 8400 km.

On this basis, if you change your dress up as Rawls. What happens to Reuss Dynamics' lighter 'Spey' MK611-8 turbofan engines?

The two engines reduce the weight of the whole machine by almost 1.6 tons, reduce fuel consumption by 30%, and carry at least 2 tons more fuel, in the case that the weight of personnel and materials will not exceed 3.5 tons, the range can reach 12,000 kilometers, and the installation of winglets can usually save 3% to 6% of fuel, and if winglets are installed, the aircraft can obtain a range of at least 12,500 kilometers......

Lin Hongfei was frightened by the number he calculated: although he knew that the TU-134B could easily be converted into an ultra-long-range business jet with a range of tens of thousands of kilometers after being equipped with a new engine...... A business jet can only carry about 22 people at most...... But after all, this is still a number on paper, but when he calculated that his plane is likely to have the ability to fly 12,500 kilometers, he suddenly calmed down.

The Gulfstream V, the world's first ultra-long-range business jet that has just begun to be announced, can only achieve its own maximum range of 12,046 kilometers when carrying 8 passengers, and if it is fully loaded with 19 passengers, the maximum range will be sharply reduced to 6,500 kilometers, while its own TU-134B, after increasing the wings, replacing the engine, and replacing it with a new two-person cockpit to further reduce weight, has the ability to fly more than 12,500 kilometers...... Isn't that a little too rebellious?

"Mr. Acton, you can wait a moment......"

Lin Hongfei said, pulled a chair, picked up the pen and began to draw sketches on the paper and began to calculate.

Half an hour later, he threw his pen and let out a long breath, "Mr. Acton, you are right, as long as we lengthen the wings, replace the engines, and upgrade the entire avionics system to an advanced two-person cockpit of American and European standards, this aircraft of ours, in the most conservative way of calculation, also has a range of 12,500 kilometers...... If the shape of the wing is good enough, it can even exceed 13,000 kilometers, which will be the most outstanding work in the history of business jets in the world! ”

"Of course!" Acton pointed to the sketch of the lengthened and enlarged wings drawn by Lin Hongfei, and said proudly, "Look, looking at it this way, is this plane immediately much more elegant?" A spacious and luxurious and comfortable aircraft, we sold it for $25 million, absolutely no problem! ”

"Of course there is no problem, but I need to get a prototype as soon as possible and apply for an airworthiness certificate from the FAA," Lin Hongfei suddenly began to have a headache when he thought of this problem, and it took almost two years to apply for an FAA airworthiness certificate from the FAA, which cost a huge amount of money, which is a big expense, not to mention this, the shape of the nose fairing and the shape of the wing are not casually scribbled, which requires accurate calculations, and at the same time, it is necessary to optimize or even strengthen the design in combination with the strength of the fuselage......

Lin Hongfei is good at car design, but when he is engaged in aircraft design, especially aerodynamic design, Lin Hongfei is blind, especially this kind of thing that needs to be blown out of the wind tunnel...... Do you want to ask for help? A thought suddenly popped up in Lin Hongfei's heart.

As soon as this thought came to mind, it could no longer linger: Shi Lao was one of the 35 top scientists who were explicitly forbidden by the US government to return to the Republic of China, but among these 35 scientists, there was one who was even better, and this was the founder of the Republic's aerospace industry, the winner of the "Two Bombs and One Satellite" Meritorious Service Medal, and a leading figure in the fields of applied mathematics and applied mechanics and aerodynamics in the 20th century, and was known as the "Republic", "Father of Missiles of the Republic", "Father of Automatic Control of the Republic" and "King of Rockets" Qian Lao, who is called by the Americans, is a creation god-like existence that one person is worthy of five divisions. (To be continued......)