Chapter 1205 Attack or defense?
The plan proposed by 601 does seem a bit strange at first glance.
However, the people at the scene were all experts who were very familiar with the layout of the aircraft wing, and they quickly responded.
"Semi-tailless layout?"
There was a buzz of discussion in the venue.
Even Chang Haonan, who thought he had expected it, had a somewhat surprised expression on his face.
The so-called semi-tailless layout is generally understood to combine the horizontal tail and vertical tail of the aircraft into one, and use a set of large-angle V-shaped airfoils to simultaneously function as pitch/heading control and stabilizer. .
Of course the most typical representative is the YF23 fighter jet that once competed with the YF22 in an ATF bid, but ultimately lost because the plan was too radical.
However, perhaps because of lessons learned from Nopoulos Grumman, although the design scheme on the screen adopts a semi-tailless layout, other design features are not as radical as the YF23.
In general, it still has the conventional shape of air intakes on both sides, diamond-shaped upper monoplane, full-span leading edge flaps, trailing edge outer ailerons and inboard flaperons.
It’s just that the distance between the two engines is significantly larger than the canard plan of the 611th Institute, causing the two magazines to change from a parallel layout to a tandem layout.
Although there is no scale bar, it is still not difficult to see that the axial dimension of this solution is shorter and the spanwise dimension is increased, so it also appears more substantial.
Fortunately, the height of the fuselage is still under control, and it does not become an uncoordinated fat duck shape like the F35.
Several representatives from Institute 601 had obviously expected that this plan would have a certain impact on the scene, so they did not start introducing it immediately, but set aside some time to provide a buffer for others.
It wasn’t until a few minutes later that the scene gradually calmed down again.
The attention of many participants also returned to the seats of representatives of House 601.
"As Comrade Yang said just now, if you just follow the technical ideas of the F22, it is impossible to truly obtain a product that surpasses its performance."
As soon as Sun Cong opened his mouth, he was tit for tat. , directly use what the other party said. Head:
“From a technical principle, the airfoil not only provides the basis for aircraft flight, but also increases the aerodynamic resistance and radar reflection area, and the interaction between different airfoils is also The key points and difficulties in the field of aircraft stealth design, so we We tried to reduce the number and area of the airfoil without affecting the lift and control capabilities, and finally came up with this technical solution of a semi-tailless layout.”
“As for the layout itself, I have a lot to say. I think everyone here should be familiar with it, except for the most typical In addition to the YF23 plan, the X32 demonstrator launched by Boeing in the JSF project is strictly a conventional layout with a tailless delta wing and twin vertical tails, but it is consistent in the idea of improving stealth performance by reducing the number of airfoils. of..."
"Although our country has not officially put into service a semi-tailless aircraft in the past, we have gained certain design experience through research on the 'Dark Sword' UAV concept aircraft and have conducted many rounds of control logic for this layout. Ground test..."
"..."
Although Sun Cong's introduction was also quite exciting, it was not difficult for Chang Haonan to see that the atmosphere at the scene seemed to be biased towards the previous plan of the 611 Institute A little more.
After all, the plans proposed by both sides are not conventional, and they have very high requirements for wing surface relationship and flight control.
Ke 611 Research Institute has already verified the feasibility of the canard + delta wing layout on the J-10, and now it has come up with a second similar plan, which can be regarded as familiar.
In comparison, the semi-tailless layout of Institute 601 seems a bit shaky.
Of course, you can say that when the J-10 was built, the risks faced by that plan were no less than today’s semi-tailless layout.
But times have changed after all.
In 2005, China had already passed the stage where it had to take risks and do triple jumps to catch up with the world's leading level.
Seeking stability on the basis of targeted design is the choice that most people prefer to see.
However, Sun Cong, who was making an impassioned speech, could not just die down.
Radical solutions will naturally bring radical performance.
After a short pause, he turned to the next part of the PPT on the computer:
“I have read the report made by comrades in the Air Force last month. Although the dual-base radar was very early Signs of the opponent's stealth fighter were detected, allowing the commander to prepare in the right direction in advance, but to truly capture the specific position of the F22, he still had to grab the opponent and pull it up at a large angle, preparing to face our interceptor. Opportunity. ”
“According to our calculations and simulation tests, after reducing a set of airfoils, although it will not have a significant impact on the RCS paper minimum value directly ahead, it can reduce the noise from the front hemisphere. The RCS value in the up and down 60° direction is reduced by about 40%, which significantly improves the probability of the aircraft being detected during turning, climbing or diving, and improves the tactical flexibility of the stealth aircraft during use.”
"One thing I would like to draw your attention to is that although the Chinese Air Force still focuses on homeland air defense missions, the People's Army still has historical missions to complete. The new generation of main battle equipment should gradually abandon the purely defensive operational thinking and begin to consider The combat environment that may be faced in offensive missions..."
"And, in addition to better stealth capabilities, this half has no The tail layout also provides a greater magazine depth, allowing the aircraft to carry larger-diameter air-to-surface weapons while maintaining stealth, without the need to specially develop small-yield and small-size ammunition like SDB. This This is also one of the original intentions of the US military to develop JSF fighter jets..." This statement actually brought back the balance that had been seriously tilted just now.
In particular, the paragraph "The unfulfilled historical mission of the people's army..." directly hit the hearts of several military representatives.
The sound of discussion once again filled the venue.
Lu Guang, who frowned, lowered his head and thought for a while, then turned to look at Li Jianqiang, who had never expressed his position before:
"Old Li, what do you think... of long-range weapons like AN/FPS-115?" If the warning radar is used for anti-stealth operations, how effective will it be? "
Although Lu Guang is the leader of the Air Force Equipment Research Institute, his main expertise is in the aviation field.
As for air defense and anti-missile, the latter is more professional.
Li Jianqiang was stunned after hearing this:
"You mean paving claws?"
But before Lu Guang could answer, he quickly understood the meaning of the other party's question——
Since Sun Cong had already mentioned the attack For topics related to missions, it is natural to take into account the air defense equipment of the main imaginary enemies in the future.
Air defense systems like Hawke or Tiangong are not something to be afraid of, but if the two paving claws are really built and put into use, they still have to be respected to a certain extent.
“Our country currently does not have similar equipment, so I can’t draw a direct conclusion...”
After Li Jianqiang thought for a moment, he first came up with a disclaimer, and then replied:
"The paving claw was originally designed for high-precision anti-missile warning, so the elevation angle of the array is very large, which is not conducive to long-range observation. Aerodynamic targets flying at medium and low altitudes. "
"Of course, this radar has a theoretical detection range of more than 5,000 kilometers for targets with 10 square meters of RCS, and it uses the UHF band, which is not the comfort zone of stealth aircraft... …So even if the above unfavorable factors are taken into account, without considering low-altitude penetration or electromagnetic interference, the threat to general stealth targets should not be underestimated.”
A few people nearby thought that this was not the case. When he came to the final conclusion, he suddenly changed the subject:
"But having said that... the Paving Claw is a fixed target after all. Even if it is difficult for the Air Force to deal with it, there are still ballistic missiles from the Second Artillery Corps after all. …And Dean Lu, don’t forget, the focus of our future combat scenarios is not how to seize the target, but how to carry out area denial…”
This answer can be regarded as pulling Lu Guang back from being led astray.
What the aviation force currently needs is a fourth-generation aircraft that can form combat effectiveness as soon as possible to compete with the F22 and the larger number of F35s in the future.
After settling on this idea, it is not difficult to analyze that the plan of the 611 Institute is currently the most suitable.
Even if other solutions such as three-wing or conventional layout are proposed, it will be difficult to be more advantageous than the canard+delta wing layout.
At the same time, the aviation industry has also begun to pay attention to some specific technical issues of the semi-tailless layout...
"Academician Chang, the semi-tailless layout needs to be combined with thrust vector technology to achieve controllability and maneuverability comparable to other airfoil layouts. What is the research status of the Aerodynamics Group in this area?"
No Unexpectedly, someone soon took the initiative to bring the topic to Chang Haonan.
To be honest, Chang Haonan himself is really interested in this semi-tailless layout.
But interest is interest, and he cannot affect the fairness of the results simply because of his personal likes and dislikes.
“Our group is conducting ground control testing of a vector nozzle on a turbofan 10 engine, and it is expected to enter the flight verification stage next year at the latest...”
Chang Haonan first briefly mentioned the research and development progress on his side:
“However, the semi-tailless layout requires omnidirectional thrust vector technology. The structure of this vector nozzle is very complex and its service life will be longer than The engine itself is much shorter...Of course, generally the vector nozzle only takes effect for a short time, so it is acceptable, but if the thrust vector is to be frequently involved in flight control, this issue must be considered..."
Aircraft research and development, in the final analysis, is inseparable from power.
Therefore, Chang Haonan’s words set the tone for the entire seminar to a certain extent.
Combined with the opinions of the aviation force, anyone with a discerning eye can basically see that 611 should have the last laugh.
It's just that the level of this meeting is not high enough to make a formal decision...
(End of Chapter)