Chapter 615 The Real Hexagonal Warrior
After no longer worrying about power, when I look at the schematic diagram of the aircraft on the PPT, the feeling is completely different.
There are no disadvantages, only advantages.
If I have to say it, it is because as the aircraft becomes larger and heavier, the flexibility or agility will inevitably decline, and the area ratio design that was almost the theoretical optimal solution in the past has been lost. In the future, the paper maximum speed may be slightly reduced.
But because of the larger thrust engine, there will definitely not be any major regression in terms of overall mobility.
Times have changed, my lord.
Today is no longer the age of machine gun fighting, and the loss of agility is not important at all.
“Then, let’s continue to look at the improvement plan of this Class II prototype.”
“First of all, the most obvious improvement part is naturally the air intake, and the overall design idea of this part , I have discussed it with Mr. Song and Mr. Yang before, and since last year, we have planned research in related fields with the assistance of our brother units.”
“We will also invite you this time. As for Chief Engineer Sun Huizhong from Guihang Industry, he will serve as a member of the No. 10 Project design team in the subsequent design process..."
Hearing his name being mentioned suddenly, Sun Huizhong's face showed an expression of shock and a bit of surprise. He quickly stood up, turned around and greeted the venue behind him.
Originally, Chang Haonan actually wanted Song Wencong to talk about this matter, but the latter said that it was Chang Haonan's intention to leave this part of the work to Guihang and not to take credit for others.
This is the seemingly random sentence just now.
For a project like Project 10, which involves many systems and departments, except for the core leadership members, many people are not familiar with each other at all.
This is especially true for people like Sun Huizhong who joined midway.
If integration into the team is not smooth, it is easy to appear like an outsider here to pick peaches.
For example, when the production of JJ-7 was handed over to Guihang, it was not without objections.
After all, Rong Fei himself was so poor at that time that he was about to lose his pants.
It would be much better now to be mentioned casually like this in the middle of a technical seminar.
After all, if we hold another non-nutritious meeting just for this matter, it will become a burden for everyone.
After introducing Sun Huizhong’s situation to everyone, Chang Haonan quickly returned to the topic:
“The results of the actual installation test of the DSI air inlet are finally reflected in the fact that the current design has been finalized and almost The data collected during the test flight of the JJ-9 advanced trainer aircraft, which is sold both domestically and overseas, will be used in the subsequent research and development of Project 10. "
"Based on the current test flight, it will also be used. There are extended data calculation results. When the incoming flow Mach number of the DSI inlet is 1.2 and below, the pressure coefficient on the lip bulge surface is symmetrically distributed along the center line of the bulge, the pressure gradient is obvious, and it increases along the mainstream direction at different cross-sections. Characteristics, the bulge configuration has a significantly stronger cleaning effect on the boundary layer than the current binary adjustable inlet.”
“After exceeding Mach number 1.4, the boundary layer cleaning ability on the bulge surface will be greater. The sharp reduction will lead to increased boundary layer separation, which will in turn cause greater intake pressure loss and distortion. It is expected that after the use of vortex generators, this obvious inflection point can be extended to Mach number beyond 1.8.”
"Of course, the specific design details need to be determined by the comrades responsible for the air intake design based on the actual situation. However, I already have a relatively mature design method here, so I don't have to start from scratch."
As soon as these words were spoken, there were several faint, slightly thankful exclamations coming from below.
Obviously, the intensity and difficulty of such work are much lower than what they had expected.
“However, considering that there are already heavy-duty aircraft and special interceptor aircraft in the future air force equipment sequence, the J-10 is not required to undertake high-speed interception tasks, and it is difficult for the aircraft to achieve this under common combat loads. The speed is above Mach 1.8, so this kind of performance calibration is no problem for a single-engine medium-sized aircraft.”
At this point, Chang Haonan also paused for a moment.
On the one hand, it allows everyone below to absorb the content. On the other hand, it also takes the opportunity to drink water and turn the PPT to the next page.
It's still the same plane, but the view has been switched to the belly part.
“As can be seen from the first schematic diagram of dimensions, the three-dimensional dimensions of the new design have basically remained the same, but the cross-sectional shape of the aircraft has undergone relatively large changes, which has increased a certain amount of resistance. , but it also increases the area of the belly and the internal volume of the fuselage. "
"In the original design, the aircraft only had a total of 7 main hardpoints, only 4 of which could carry weapons and ammunition. In terms of operation, composite pylons can be used to increase the loading capacity, but it will still limit the multi-purpose performance of the aircraft."
"After modification, the original belly centerline pylon can be divided into two. Eliminate the fuel supply system here and replace it with electrical wiring. If necessary, you can even add two more light-load pylons specifically for air-to-air bombs on the side edges of the inlet between the main and auxiliary landing gear.”
PPT is indeed a good thing. It allows Chang Haonan, who is not good at drawing, to no longer pollute his and others' eyes with chalk and blackboard.
With just a click of the mouse, the new pylon arrangement is displayed on the bottom view of the aircraft.
"Mr. Chang." Taking advantage of this opportunity, an engineer sitting in the first row below raised his hand and asked:
"Two medium-range air-to-air bombs , plus the corresponding hanger, it is about 400-450kg. Will adding such a weight to the side edge of the front half of the air intake affect the strength of the lip? "
His concerns? It obviously makes sense.
After all, in the existing design, the main function of the six sticks connecting the air intake duct and the body is to strengthen the structure...
"This issue was considered at the beginning of the plan. It was initially prepared Additional reinforcement was made at the connection, but later it was discovered that the DSI air intake itself can reduce the mass by nearly 300kg compared to the binary adjustable air intake, so it will not make that big a difference over and over again. "
“What really needs to be properly handled by the comrades involved in the structural design is how to arrange the electrical circuits required for the two hangers in the outer wall of the air inlet...”
“That is, Say...the belly part is not going to be used for auxiliary fuel tanks?”
“That’s right”
Chang Haonan nodded directly:
"The auxiliary fuel tank originally planned to be arranged in the belly of the aircraft is only 900 liters. After modifying the fuselage, the fuel volume in the aircraft is expected to increase by about 1100L, which can completely cover this 900L of fuel in the belly auxiliary fuel tank. ”
“This leaves the prime position between the two landing gears, which can completely mount two air-to-surface weapons that are relatively large in size and weight. ”
“Placing the large mount closest to the centerline of the aircraft, compared to arranging it under the wing according to the conventional plan, although the total weight does not change, the moment of inertia of the aircraft is smaller, so it can maintain a higher Mobility."
At this point, those who reacted quickly have basically understood what Chang Haonan meant.
"Comrade Haonan means to transform our Project No. 10 into a multi-purpose fighter that can be compatible with various types of missions..."
Yang Wei looked at the design plan projected on the screen, The key is pointed out.
It’s not just the application of a certain technology.
It is a change of thinking.
“Yes, a true multi-role fighter.”
Chang Haonan immediately expressed his affirmation, and then began to describe his overall thoughts:
"Although technically speaking, the current J-10 is fully capable of this, but from the overall layout, it is not actually It is suitable for performing missions such as battlefield interdiction or off-zone air strikes.”
“Of course, in terms of the current struggle situation we are facing, a medium-sized aircraft with a focus on agility is preferred for pure air superiority. The aircraft does meet the needs of the aviation force. "
"However, with the continuous development and progress of our People's Air Force, it has transformed from a purely defensive force into an offensive and defensive air force, and even an offensive air force. In fact, it is something that is just around the corner.”
“An aircraft with limited range and mounting capacity will definitely be difficult to adapt to the increasingly complex combat concepts of the People’s Air Force in the future, and the vitality of a model aircraft will depend on it for a long time. To a large extent, it all depends on how well its basic design can meet the needs of users. ”
"That's why I came up with such a preliminary plan. I hope that the Project 10 can truly become an all-round model with no obvious shortcomings in the size of a medium-sized aircraft!"
In fact, , from the beginning when he participated in Project No. 10, his goal was to make this aircraft surpass the F16 in all aspects, not just in air combat performance.
However, before the performance of the turbofan 10 was truly determined, this matter was indeed difficult
So he never stated this goal.
The J-10 in the previous generation was due to technology (it was too heavy and the engine thrust was not enough) and vision (no one could have imagined that the Air Force would have thousands of third/fourth generation aircraft in more than ten years) ) level constraints, we chose a single-function technical route that was short-term and superior.
But the problem is, excluding the special scenario of carrier-based aircraft, medium-sized aircraft cannot beat heavy-duty aircraft of the same technical level in any way except cost.
So whether it is the F16 or the J-10, the "light" part of the light-heavy combination will eventually tend to do the dirty work (licking the ground).
However, when the Air Force really used the original J-10 to do odd jobs, it found that it seemed not suitable for dirty work...
There was even the use of asymmetric mounts, with one side The famous scene where you have an empty weapon on the opposite side and an empty ammo on the other side.
Although it is not impossible to use, it is very awkward to use.
Nowadays, the more powerful turbofan 10B has emerged, which can naturally solve this problem without any worries, thereby creating a true hexagonal warrior!
(End of this chapter)