Lack of power pneumatic supplement, this is the Republic of China's aviation industry shouted for decades of slogans, its degree of deep penetration in the hearts of the people is by no means ordinary, and now encountered the same old problem, Comrade Wang naturally thought of starting from the pneumatic aspect at the first time.

Anyway, the duck pneumatics have long been familiar with the heart, and they only need to give the most suitable aerodynamic design according to the requirements of the other party, and even have a draft in their hearts, and blurt out: "Medium-distance coupling, belly air intake, single shot and single hanging tail." ”

Very concise jargon, it has clearly outlined the design of the South African program, in order to meet the given air combat capability in the case of insufficient power, the aerodynamic aspect must be optimized to the air superiority aspect.

Close-coupled canard aerodynamics such as Rafale and Lion must no longer be considered, this design can only control the vortex and play a role in lifting, which is of course the best balance when the engine performance is sufficient.

Correspondingly, when the engine performance is insufficient, the canard wing can only continue to move forward, so that it has a trim function, and the natural maneuverability can be greatly improved.

As for why the belly air intake is used, this problem is simpler, the first thing to ensure the belly air intake is to be the fighter maneuvering at a high angle of attack, and secondly, it can also simplify the design of the inlet channel flow path, which can also help the power output of the aircraft to a certain extent, compared with the more traditional air intake on both sides, there will usually be an increase of one to two percentage points.

Single-engine single-vertical tail, this is actually even a standard configuration, as a single-engine fighter, it has strict requirements for the weight of the fuselage, and it is better to use a single vertical tail than a double vertical tail.

Comrade Lao Wang simply sketched out the design of the plan, and Wang Zhengguo on the side almost swallowed his tongue into his stomach, isn't this the new design plan adopted by Shudu in the end, what is this going to do?

But looking back and thinking about it carefully, it seems that Dad should know the confidentiality regulations better than himself, maybe the follow-up development is not so simple, or take a look at it later, after all, the requirements of the Republic and South Africa are not the same.

One is to require medium and low-altitude maneuverability and multi-purpose ground attack, and the other is air superiority and volleying, in the case of different positioning, even if there will be some similarities, but there will definitely be a gap in the final details.

Lao Wang took the drawing pen and paper presented by the South Africans, and after having the tools, the design scheme conceived in his mind can be displayed more clearly.

That is, after the top view of the plan gradually became clear, Wang Zhengguo found the difference in design, the fuselage may be no different from the domestic new Jj plan, but the wing design is already very different.

On paper, it is a simple large swept delta wing, but the solution cuts the wingtips and fits wingtip pylons, which is similar to the wing shape of the Rafale fighter.

In terms of wing design, in order to effectively reduce flight resistance, and air superiority and volley operations do not need too many hanging points, the designers also abandoned this.

In addition to the difference that the South African scheme has wingtip pylons, the straight wing used is naturally better in terms of high-speed performance than the compound torsion design of the leading edge of the wing by the No. 10, which is a unique design detail made specifically for interception missions.

Obviously, the two aircraft with different positioning may have a similar fuselage design, but there are already significant differences between the two in the wing design that has the greatest impact on the aerodynamic performance of the fighter, which is not an exaggeration.

Seeing that there is a difference between the two models, Wang Zhengguo's hanging heart finally let go, at least this has proved that Dad is not leaking, but making the best plan according to the needs of the other party.

Looking at the South African side, they and Wang Zhengguo's focus is different, for the wing design on the drawings, this is not a big problem, it is decent, it does meet the needs of multi-purpose, it is definitely the international mainstream design, but the canard wing installation location is more interesting.

Its existence must greatly improve the maneuverability, and it is indeed very suitable for our practical needs. ”

The role of medium-range coupling is self-evident, and it is perfectly fine to say that it is designed for air combat, ensuring the requirements of the vortex while also ensuring the balance requirements of the fighter, and also contributing to the maneuverability.

On this point, at least theoretically, there is no problem, but in the eighties the international did not adopt this kind of design, so most people will ignore, that is, Comrade Wang, a designer who has studied canard aerodynamics for many years, only he will be sure to grasp the advantages and disadvantages of medium-distance coupling.

As for medium-range coupling, after the Republic made Project 10 (New J), Israel soon proposed that the advanced air superiority model of the Lion fighter that had been dismounted at that time also used medium-distance coupling and a generation of high-thrust turbofans, but it is a pity that the so-called advanced air superiority Lion is shorter, and it only exists in the drawings.

Throwing the pen on the drawing in a dashing manner: "That's right, I sprayed the original according to Spey's thrust data, designed a compact medium and light fighter, in the case of sufficient power, even if the use of close coupling can also ensure the needs of air combat, but now no, the power is not enough, we can only make up for it pneumatically, then adjust to medium-range coupling." ”

No matter what kind of canard wing plan, Lao Wang is already familiar with it, and he can easily come up with the best plan according to the requirements of reality, and for the current power system, Lao Wang has to make another trade-off, but this trade-off is not easy for him to get an idea.

Therefore, it is also possible to put forward both options: "In terms of air intake, if you only require subsonic speed at medium and low altitudes, and the maximum flight speed does not exceed Mach 1.6, I personally recommend using a simple and lightweight pitot tube air intake." Of course, a two-dimensional supersonic rectangular air intake is also an option, but it is relatively heavier. ”

For the Spey engine, the thrust is not large enough, and the aerodynamic design of this scheme directly adopts a stronger payload capacity, but also a larger drag airfoil, so it can be guessed that the South African scheme cannot fly too high Mach number.

Since it is impossible to achieve high Mach numbers, the advantages of supersonic air intakes will be lost, and the pitot tube design makes even more sense.

But from another point of view, as said before, the improved and upgraded Mirage 3 can only be in service until 2000 at most, and there is really no need to worry about the interception mission during this time, but if the Mirage 3 is retired after 2000, how to consider the interception mission?

This kind of problem involves South Africa's overall armament development plan, and it is not something that Lao Wang can know now, so he put forward both plans, and the other side can choose whatever he chooses.

"Thank you, Chief Engineer Wang, the plan you proposed is indeed very inspiring, I will immediately go back to South Africa to report to the authorities, in the end how to choose, it depends on the meaning of the high-level, but I personally think that maybe the pitot tube intake you support has a greater chance of winning, after all, when we need to modify a better engine in the future, we will inevitably rematch and design the intake duct, and then redesign it as needed. ”